./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs --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 279a162aa90145a7316b3266460570a8e3cad8e6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs --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 279a162aa90145a7316b3266460570a8e3cad8e6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:04:15,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:15,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:15,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:15,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:15,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:15,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:15,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:15,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:15,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:15,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:15,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:15,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:15,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:15,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:15,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:15,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:15,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:15,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:15,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:15,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:15,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:15,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:15,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:15,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:15,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:15,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:15,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:15,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:15,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:15,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:15,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:15,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:15,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:15,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:15,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:15,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:15,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:15,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:15,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:15,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:15,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:04:15,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:15,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:15,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:15,566 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:15,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:15,567 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:15,567 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:04:15,568 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:15,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:15,575 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:04:15,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:04:15,577 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:15,577 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:04:15,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:04:15,578 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:04:15,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:15,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:15,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:04:15,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:15,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:15,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:04:15,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:15,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:04:15,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:15,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:15,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:04:15,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:15,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:04:15,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:15,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:15,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:15,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:15,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:15,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:04:15,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:04:15,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:04:15,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:04:15,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:15,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:15,586 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-16 03:04:15,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:15,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:15,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:15,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:15,937 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:15,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-16 03:04:16,007 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/fe3d5021b/8ba0e957ad54431d8bdfaa57e4cf4f05/FLAG6d6c910a7 [2021-10-16 03:04:16,611 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:16,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-16 03:04:16,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/fe3d5021b/8ba0e957ad54431d8bdfaa57e4cf4f05/FLAG6d6c910a7 [2021-10-16 03:04:16,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/fe3d5021b/8ba0e957ad54431d8bdfaa57e4cf4f05 [2021-10-16 03:04:16,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:16,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:16,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:16,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:16,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:16,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:16" (1/1) ... [2021-10-16 03:04:16,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:16, skipping insertion in model container [2021-10-16 03:04:16,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:16" (1/1) ... [2021-10-16 03:04:16,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:16,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:17,351 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-16 03:04:17,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:17,375 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:17,435 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-16 03:04:17,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:17,471 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:17,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17 WrapperNode [2021-10-16 03:04:17,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:17,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:17,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:17,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:17,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:17,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:17,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:17,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:17,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:17,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:17,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:17,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:17,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (1/1) ... [2021-10-16 03:04:17,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:17,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:17,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:17,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:17,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:04:17,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:04:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:17,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:17,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:17,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:17,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:04:17,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:17,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:18,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:18,088 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:04:18,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:18 BoogieIcfgContainer [2021-10-16 03:04:18,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:18,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:18,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:18,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:18,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:16" (1/3) ... [2021-10-16 03:04:18,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d0aaac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:18, skipping insertion in model container [2021-10-16 03:04:18,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:17" (2/3) ... [2021-10-16 03:04:18,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d0aaac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:18, skipping insertion in model container [2021-10-16 03:04:18,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:18" (3/3) ... [2021-10-16 03:04:18,115 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-16 03:04:18,121 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:18,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:04:18,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:18,203 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, mConcurrency=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 [2021-10-16 03:04:18,203 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:04:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) [2021-10-16 03:04:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:04:18,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:04:18,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,238 INFO L82 PathProgramCache]: Analyzing trace with hash 74567963, now seen corresponding path program 1 times [2021-10-16 03:04:18,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581140862] [2021-10-16 03:04:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:18,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581140862] [2021-10-16 03:04:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581140862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:18,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874995378] [2021-10-16 03:04:18,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:04:18,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:04:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:18,498 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:04:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,513 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2021-10-16 03:04:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:04:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-16 03:04:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,524 INFO L225 Difference]: With dead ends: 17 [2021-10-16 03:04:18,524 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 03:04:18,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 03:04:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 03:04:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-10-16 03:04:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-16 03:04:18,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2021-10-16 03:04:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,563 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-16 03:04:18,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:04:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-16 03:04:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:04:18,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:04:18,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:04:18,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1997841778, now seen corresponding path program 1 times [2021-10-16 03:04:18,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756074653] [2021-10-16 03:04:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:18,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756074653] [2021-10-16 03:04:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756074653] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:18,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:18,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:18,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182582015] [2021-10-16 03:04:18,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:18,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:18,634 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) 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) [2021-10-16 03:04:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,650 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-16 03:04:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 [2021-10-16 03:04:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,651 INFO L225 Difference]: With dead ends: 18 [2021-10-16 03:04:18,652 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 03:04:18,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 03:04:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-16 03:04:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-16 03:04:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 03:04:18,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-10-16 03:04:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,658 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 03:04:18,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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) [2021-10-16 03:04:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 03:04:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:04:18,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,659 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:18,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:04:18,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash -106563549, now seen corresponding path program 1 times [2021-10-16 03:04:18,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832829834] [2021-10-16 03:04:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:18,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832829834] [2021-10-16 03:04:18,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832829834] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:18,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:18,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:04:18,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135542014] [2021-10-16 03:04:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:18,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:18,753 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:04:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:18,786 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-16 03:04:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 [2021-10-16 03:04:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:18,788 INFO L225 Difference]: With dead ends: 17 [2021-10-16 03:04:18,788 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 03:04:18,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 03:04:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-10-16 03:04:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-10-16 03:04:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-16 03:04:18,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-10-16 03:04:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:18,794 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-16 03:04:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:04:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-16 03:04:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:04:18,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:18,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:04:18,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash -649059074, now seen corresponding path program 1 times [2021-10-16 03:04:18,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:18,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585134455] [2021-10-16 03:04:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:18,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:18,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585134455] [2021-10-16 03:04:18,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585134455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:04:18,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019131157] [2021-10-16 03:04:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:18,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:18,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:04:19,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:04:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 03:04:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:19,254 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 13 treesize of output 9 [2021-10-16 03:04:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:04:19,389 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 [2021-10-16 03:04:19,394 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 [2021-10-16 03:04:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:19,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019131157] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:19,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737541126] [2021-10-16 03:04:19,559 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 03:04:19,561 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:04:19,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:04:19,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:04:19,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:04:19,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,629 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:19,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 03:04:19,643 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:19,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 03:04:19,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-16 03:04:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:19,697 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 03:04:19,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 03:04:19,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:04:19,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:04:19,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:04:19,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:04:19,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:19,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-16 03:04:19,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:04:19,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-16 03:04:19,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:19,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-16 03:04:19,942 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_11| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) 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:608) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-16 03:04:19,945 INFO L168 Benchmark]: Toolchain (without parser) took 3061.31 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 52.0 MB in the beginning and 79.1 MB in the end (delta: -27.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:19,946 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 70.3 MB in the beginning and 70.3 MB in the end (delta: 33.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:19,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 584.00 ms. Allocated memory is still 90.2 MB. Free memory was 51.7 MB in the beginning and 58.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:19,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.70 ms. Allocated memory is still 90.2 MB. Free memory was 58.5 MB in the beginning and 56.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:19,948 INFO L168 Benchmark]: Boogie Preprocessor took 27.20 ms. Allocated memory is still 90.2 MB. Free memory was 56.9 MB in the beginning and 55.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:19,949 INFO L168 Benchmark]: RCFGBuilder took 534.84 ms. Allocated memory is still 90.2 MB. Free memory was 55.6 MB in the beginning and 44.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:19,950 INFO L168 Benchmark]: TraceAbstraction took 1840.56 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 43.9 MB in the beginning and 79.1 MB in the end (delta: -35.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:19,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 70.3 MB in the beginning and 70.3 MB in the end (delta: 33.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 584.00 ms. Allocated memory is still 90.2 MB. Free memory was 51.7 MB in the beginning and 58.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.70 ms. Allocated memory is still 90.2 MB. Free memory was 58.5 MB in the beginning and 56.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.20 ms. Allocated memory is still 90.2 MB. Free memory was 56.9 MB in the beginning and 55.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 534.84 ms. Allocated memory is still 90.2 MB. Free memory was 55.6 MB in the beginning and 44.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1840.56 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 43.9 MB in the beginning and 79.1 MB in the end (delta: -35.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_11| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_11|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:04:20,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:04:22,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:22,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:22,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:22,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:22,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:22,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:22,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:22,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:22,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:22,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:22,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:22,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:22,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:22,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:22,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:22,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:22,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:22,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:23,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:23,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:23,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:23,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:23,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:23,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:23,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:23,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:23,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:23,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:23,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:23,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:23,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:23,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:23,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:23,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:23,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:23,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:23,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:23,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:23,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:23,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:23,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:04:23,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:23,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:23,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:23,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:23,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:23,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:23,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:23,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:23,102 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:23,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:23,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:23,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:23,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:23,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:04:23,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:23,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:04:23,107 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:23,107 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:04:23,107 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:04:23,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:23,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:04:23,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:23,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:04:23,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:23,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:04:23,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:23,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:23,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:23,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:23,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:04:23,110 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:04:23,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:23,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:04:23,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:23,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:23,111 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-10-16 03:04:23,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:23,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:23,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:23,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:23,637 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:23,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-16 03:04:23,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/ff4d0ea23/56d1d4adf09c4e02aaa12b463307d4c5/FLAGbf3b61045 [2021-10-16 03:04:24,333 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:24,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-16 03:04:24,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/ff4d0ea23/56d1d4adf09c4e02aaa12b463307d4c5/FLAGbf3b61045 [2021-10-16 03:04:24,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/data/ff4d0ea23/56d1d4adf09c4e02aaa12b463307d4c5 [2021-10-16 03:04:24,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:24,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:24,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:24,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:24,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:24,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:24" (1/1) ... [2021-10-16 03:04:24,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493d09cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:24, skipping insertion in model container [2021-10-16 03:04:24,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:24" (1/1) ... [2021-10-16 03:04:24,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:24,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:25,246 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-16 03:04:25,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:25,270 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:25,338 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_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-16 03:04:25,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:25,389 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:25,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25 WrapperNode [2021-10-16 03:04:25,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:25,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:25,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:25,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:25,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:25,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:25,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:25,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:25,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:25,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:25,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:25,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:25,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (1/1) ... [2021-10-16 03:04:25,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:25,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:25,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:25,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:04:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:04:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:04:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:25,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:25,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:25,964 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 03:04:25,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:25 BoogieIcfgContainer [2021-10-16 03:04:25,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:25,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:25,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:25,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:25,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:24" (1/3) ... [2021-10-16 03:04:25,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0052d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:25, skipping insertion in model container [2021-10-16 03:04:25,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:25" (2/3) ... [2021-10-16 03:04:25,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0052d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:25, skipping insertion in model container [2021-10-16 03:04:25,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:25" (3/3) ... [2021-10-16 03:04:25,977 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-16 03:04:25,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:25,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:04:26,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:26,041 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, mConcurrency=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 [2021-10-16 03:04:26,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:04:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) 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) [2021-10-16 03:04:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:04:26,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:26,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:04:26,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 890006222, now seen corresponding path program 1 times [2021-10-16 03:04:26,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:26,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239989854] [2021-10-16 03:04:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:26,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:26,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:26,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:26,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:04:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:26,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:04:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:26,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:26,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:26,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239989854] [2021-10-16 03:04:26,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239989854] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:26,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:26,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:04:26,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354620626] [2021-10-16 03:04:26,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:04:26,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:04:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:26,374 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) 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) 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) [2021-10-16 03:04:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:26,390 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-10-16 03:04:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:04:26,392 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 [2021-10-16 03:04:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:26,401 INFO L225 Difference]: With dead ends: 22 [2021-10-16 03:04:26,402 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 03:04:26,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 03:04:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 03:04:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2021-10-16 03:04:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-16 03:04:26,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-16 03:04:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:26,440 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-16 03:04:26,440 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) [2021-10-16 03:04:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-16 03:04:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:04:26,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:26,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:04:26,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:26,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:26,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash 889648730, now seen corresponding path program 1 times [2021-10-16 03:04:26,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:26,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318679962] [2021-10-16 03:04:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:26,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:26,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:26,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:04:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:26,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:04:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:26,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:26,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318679962] [2021-10-16 03:04:26,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318679962] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:26,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:26,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:04:26,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380491364] [2021-10-16 03:04:26,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:26,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:26,833 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-10-16 03:04:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:26,879 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-16 03:04:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-10-16 03:04:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:26,881 INFO L225 Difference]: With dead ends: 19 [2021-10-16 03:04:26,881 INFO L226 Difference]: Without dead ends: 13 [2021-10-16 03:04:26,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-16 03:04:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-10-16 03:04:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-16 03:04:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 03:04:26,886 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-10-16 03:04:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:26,887 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 03:04:26,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-10-16 03:04:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 03:04:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:04:26,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:26,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:26,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:27,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:27,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash 671286241, now seen corresponding path program 1 times [2021-10-16 03:04:27,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:27,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886432549] [2021-10-16 03:04:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:27,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:27,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:27,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:04:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:04:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:27,270 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 03:04:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-16 03:04:27,305 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 [2021-10-16 03:04:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:27,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:27,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:27,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886432549] [2021-10-16 03:04:27,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886432549] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:27,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:27,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:04:27,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981502746] [2021-10-16 03:04:27,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:27,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:27,387 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:04:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:27,469 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-16 03:04:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 [2021-10-16 03:04:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:27,470 INFO L225 Difference]: With dead ends: 18 [2021-10-16 03:04:27,471 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 03:04:27,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:04:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 03:04:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-16 03:04:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-10-16 03:04:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-16 03:04:27,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-10-16 03:04:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:27,476 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-16 03:04:27,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:04:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-16 03:04:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:04:27,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:27,477 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:27,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:27,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:27,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash 925471903, now seen corresponding path program 1 times [2021-10-16 03:04:27,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:27,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759780481] [2021-10-16 03:04:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:27,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:27,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:27,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:04:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 03:04:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:27,910 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 13 treesize of output 9 [2021-10-16 03:04:27,925 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 13 treesize of output 9 [2021-10-16 03:04:28,013 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 37 treesize of output 25 [2021-10-16 03:04:28,032 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 22 treesize of output 10 [2021-10-16 03:04:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:28,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:28,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:28,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759780481] [2021-10-16 03:04:28,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759780481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:28,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797609371] [2021-10-16 03:04:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:28,185 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:04:28,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:04:28,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 03:04:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:04:28,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:28,499 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 [2021-10-16 03:04:28,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-16 03:04:28,655 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 [2021-10-16 03:04:28,665 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 [2021-10-16 03:04:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:28,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797609371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:28,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921922614] [2021-10-16 03:04:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:28,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:28,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:28,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:04:28,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 03:04:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:04:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-16 03:04:28,980 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 [2021-10-16 03:04:29,049 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 [2021-10-16 03:04:29,053 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 [2021-10-16 03:04:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:29,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:29,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921922614] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:29,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:04:29,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 4, 5, 4] total 6 [2021-10-16 03:04:29,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279115920] [2021-10-16 03:04:29,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:04:29,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:04:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:29,202 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-10-16 03:04:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:29,343 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-16 03:04:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:04:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) Word has length 12 [2021-10-16 03:04:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:29,345 INFO L225 Difference]: With dead ends: 27 [2021-10-16 03:04:29,345 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 03:04:29,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:04:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 03:04:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-10-16 03:04:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-10-16 03:04:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 03:04:29,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-10-16 03:04:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:29,350 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 03:04:29,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-10-16 03:04:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 03:04:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:04:29,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:29,351 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:29,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-16 03:04:29,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:29,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:29,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:29,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1819205402, now seen corresponding path program 2 times [2021-10-16 03:04:29,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:29,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096809316] [2021-10-16 03:04:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:04:29,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:29,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:29,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:29,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 03:04:30,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:04:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:04:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:04:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:30,170 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 18 treesize of output 7 [2021-10-16 03:04:30,258 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 37 treesize of output 33 [2021-10-16 03:04:30,276 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:04:30,277 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 1 case distinctions, treesize of input 30 treesize of output 22 [2021-10-16 03:04:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:04:30,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-16 03:04:30,460 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 [2021-10-16 03:04:30,493 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 [2021-10-16 03:04:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:30,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:30,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-16 03:04:32,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-10-16 03:04:34,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-10-16 03:04:34,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:34,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-16 03:04:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-16 03:04:34,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:34,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096809316] [2021-10-16 03:04:34,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096809316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:34,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910506584] [2021-10-16 03:04:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:04:34,933 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:04:34,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:04:34,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 03:04:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:04:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:04:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 03:04:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:35,184 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 [2021-10-16 03:04:35,250 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 18 treesize of output 7 [2021-10-16 03:04:35,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:04:35,328 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 14 treesize of output 14 [2021-10-16 03:04:35,446 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 41 treesize of output 37 [2021-10-16 03:04:35,466 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:04:35,467 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 1 case distinctions, treesize of input 38 treesize of output 30 [2021-10-16 03:04:35,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:04:35,658 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 48 treesize of output 36 [2021-10-16 03:04:35,663 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 33 treesize of output 25 [2021-10-16 03:04:35,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 03:04:35,774 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 26 treesize of output 14 [2021-10-16 03:04:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:35,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:35,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:35,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:04:37,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) is different from false [2021-10-16 03:04:37,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-16 03:04:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-16 03:04:38,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910506584] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:38,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984325407] [2021-10-16 03:04:38,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:04:38,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:38,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:04:38,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 03:04:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 03:04:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:04:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 03:04:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:38,295 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 [2021-10-16 03:04:38,376 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 03:04:38,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-16 03:04:38,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:04:38,460 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 [2021-10-16 03:04:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-10-16 03:04:38,637 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-10-16 03:04:38,638 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 1 case distinctions, treesize of input 49 treesize of output 41 [2021-10-16 03:04:38,644 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 38 treesize of output 34 [2021-10-16 03:04:38,839 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 45 treesize of output 33 [2021-10-16 03:04:38,846 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 30 treesize of output 22 [2021-10-16 03:04:38,979 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 03:04:38,979 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 26 treesize of output 14 [2021-10-16 03:04:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:38,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:39,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:39,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:04:41,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) is different from false [2021-10-16 03:04:41,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:41,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-16 03:04:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-16 03:04:41,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984325407] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:41,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:04:41,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 8, 8, 8] total 29 [2021-10-16 03:04:41,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771777499] [2021-10-16 03:04:41,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-16 03:04:41,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-16 03:04:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=493, Unknown=4, NotChecked=196, Total=812 [2021-10-16 03:04:41,325 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2021-10-16 03:04:43,589 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-16 03:04:45,597 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-16 03:04:47,622 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_20))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_20) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (not (= .cse0 c_ULTIMATE.start_main_~p~0.base)) (forall ((v_ULTIMATE.start_main_~t~0.base_18 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_18))) (= (_ bv1 32) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_18) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_3)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) (= (_ bv1 32) (select (select |c_#memory_int| .cse0) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-16 03:04:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:47,850 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-16 03:04:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:04:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 [2021-10-16 03:04:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:47,852 INFO L225 Difference]: With dead ends: 22 [2021-10-16 03:04:47,852 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 03:04:47,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 15132.2ms TimeCoverageRelationStatistics Valid=147, Invalid=576, Unknown=7, NotChecked=392, Total=1122 [2021-10-16 03:04:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 03:04:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-16 03:04:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2021-10-16 03:04:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-10-16 03:04:47,859 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-10-16 03:04:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:47,860 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-10-16 03:04:47,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2021-10-16 03:04:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-10-16 03:04:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 03:04:47,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:47,862 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 03:04:47,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-16 03:04:48,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:48,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:48,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:48,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2045993606, now seen corresponding path program 3 times [2021-10-16 03:04:48,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:48,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272868060] [2021-10-16 03:04:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:04:48,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:48,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:48,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 03:04:48,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 03:04:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:04:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 03:04:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:48,802 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 [2021-10-16 03:04:48,811 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 [2021-10-16 03:04:48,956 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 18 treesize of output 7 [2021-10-16 03:04:48,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:48,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 03:04:49,039 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-16 03:04:49,039 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 1 case distinctions, treesize of input 55 treesize of output 62 [2021-10-16 03:04:49,046 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 57 treesize of output 45 [2021-10-16 03:04:49,073 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:04:49,073 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 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-16 03:04:51,820 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-16 03:04:51,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-16 03:04:51,849 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:04:51,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-10-16 03:04:51,981 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 19 treesize of output 11 [2021-10-16 03:04:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:52,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:52,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:52,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-10-16 03:04:52,490 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:52,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-16 03:04:52,497 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 782 treesize of output 704 [2021-10-16 03:04:52,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:52,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 637 [2021-10-16 03:04:55,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_8) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_10) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= .cse0 c_ULTIMATE.start_main_~t~0.offset) (= .cse1 ULTIMATE.start_main_~t~0.base)) (and (= .cse1 (_ bv0 32)) (= .cse0 (_ bv0 32))))))) is different from false [2021-10-16 03:04:57,833 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_10) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_8) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2))) (or (and .cse0 (= ULTIMATE.start_main_~t~0.base .cse1)) (and .cse0 (= .cse1 (_ bv0 32))))))) is different from false [2021-10-16 03:04:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-10-16 03:04:58,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:58,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272868060] [2021-10-16 03:04:58,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272868060] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:58,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987890468] [2021-10-16 03:04:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:04:58,147 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:04:58,148 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:04:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 03:04:58,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 03:04:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:04:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 03:04:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:58,533 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 [2021-10-16 03:04:58,627 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 [2021-10-16 03:04:58,635 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 [2021-10-16 03:04:58,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:04:58,736 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 [2021-10-16 03:04:58,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:58,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-16 03:04:58,928 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:04:58,928 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-10-16 03:04:58,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:58,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-16 03:04:58,958 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:04:58,958 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-10-16 03:04:59,413 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-16 03:04:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-10-16 03:04:59,440 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:04:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-10-16 03:04:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:59,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:01,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:01,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-16 03:05:01,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:01,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-16 03:05:04,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_26))) (and (forall ((v_DerPreprocessor_14 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_26 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_14) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((v_DerPreprocessor_13 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_26 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_13) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (_ bv0 32)))))) is different from false [2021-10-16 03:05:04,782 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 35 treesize of output 33 [2021-10-16 03:05:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-16 03:05:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987890468] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:05:04,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186286826] [2021-10-16 03:05:04,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 03:05:04,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:05:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:05:04,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:05:04,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 03:05:05,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 03:05:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:05:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 03:05:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:05,124 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 [2021-10-16 03:05:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-16 03:05:05,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:05:05,234 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:05:05,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-16 03:05:05,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:05,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-16 03:05:05,372 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:05:05,372 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-10-16 03:05:05,380 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 57 treesize of output 45 [2021-10-16 03:05:05,408 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:05:05,408 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 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-16 03:05:07,848 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-10-16 03:05:07,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-10-16 03:05:07,873 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:05:07,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-10-16 03:05:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:07,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:08,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:08,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-16 03:05:08,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:08,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-16 03:05:21,061 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 34 treesize of output 32 [2021-10-16 03:05:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186286826] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:05:21,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:05:21,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 8, 8] total 27 [2021-10-16 03:05:21,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967257144] [2021-10-16 03:05:21,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-16 03:05:21,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-16 03:05:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=468, Unknown=8, NotChecked=138, Total=702 [2021-10-16 03:05:21,094 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2021-10-16 03:05:23,370 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_10) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32))) (.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_8) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2))) (or (and .cse0 (= ULTIMATE.start_main_~t~0.base .cse1)) (and .cse0 (= .cse1 (_ bv0 32))))))) (forall ((v_ULTIMATE.start_main_~t~0.base_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_26))) (and (forall ((v_DerPreprocessor_14 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_26 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_14) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (_ bv0 32))) (forall ((v_DerPreprocessor_13 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_26 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_26) (_ bv0 32) v_DerPreprocessor_13) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (_ bv0 32)))))) (exists ((v_ULTIMATE.start_main_~p~0.base_44 (_ BitVec 32))) (and (= (_ bv1 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_44) (_ bv0 32))) (or (= c_ULTIMATE.start_main_~p~0.base (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.base v_ULTIMATE.start_main_~p~0.base_44)))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-10-16 03:05:25,383 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_8) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_10) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= .cse0 c_ULTIMATE.start_main_~t~0.offset) (= .cse1 ULTIMATE.start_main_~t~0.base)) (and (= .cse1 (_ bv0 32)) (= .cse0 (_ bv0 32))))))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-10-16 03:05:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:32,306 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-16 03:05:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 03:05:32,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 [2021-10-16 03:05:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:32,308 INFO L225 Difference]: With dead ends: 36 [2021-10-16 03:05:32,309 INFO L226 Difference]: Without dead ends: 24 [2021-10-16 03:05:32,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 36245.9ms TimeCoverageRelationStatistics Valid=127, Invalid=695, Unknown=10, NotChecked=290, Total=1122 [2021-10-16 03:05:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-16 03:05:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-16 03:05:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-10-16 03:05:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-16 03:05:32,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-10-16 03:05:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:32,325 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-16 03:05:32,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2021-10-16 03:05:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-16 03:05:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:05:32,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:32,326 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 03:05:32,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-16 03:05:32,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:32,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-16 03:05:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:32,933 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:05:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1299552385, now seen corresponding path program 4 times [2021-10-16 03:05:32,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:32,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410161118] [2021-10-16 03:05:32,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 03:05:32,934 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:32,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 03:05:33,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 03:05:33,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:05:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 03:05:33,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:33,248 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 [2021-10-16 03:05:33,297 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 18 treesize of output 7 [2021-10-16 03:05:33,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:05:33,348 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 14 treesize of output 14 [2021-10-16 03:05:33,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:05:33,450 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 41 treesize of output 37 [2021-10-16 03:05:33,474 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:05:33,474 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 1 case distinctions, treesize of input 38 treesize of output 30 [2021-10-16 03:05:33,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:33,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-16 03:05:33,744 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-16 03:05:33,744 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 1 case distinctions, treesize of input 92 treesize of output 95 [2021-10-16 03:05:33,821 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-16 03:05:33,822 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 3 case distinctions, treesize of input 101 treesize of output 96 [2021-10-16 03:05:33,827 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 90 treesize of output 78 [2021-10-16 03:05:33,849 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:05:33,850 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 1 case distinctions, treesize of input 75 treesize of output 74 [2021-10-16 03:05:33,851 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-16 03:05:35,786 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-16 03:05:35,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 77 [2021-10-16 03:05:35,817 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:05:35,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 58 [2021-10-16 03:05:36,202 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-16 03:05:36,202 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 48 treesize of output 35 [2021-10-16 03:05:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:36,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:38,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:38,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-16 03:05:38,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:38,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-16 03:05:38,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:38,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-10-16 03:05:40,865 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse1 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse0 v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_19) .cse0 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_21) .cse0 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse1))) (_ bv1 32))) is different from false [2021-10-16 03:05:42,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32))) is different from false [2021-10-16 03:05:42,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:42,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2090 [2021-10-16 03:06:20,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) is different from false [2021-10-16 03:06:20,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:20,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-16 03:06:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 7 not checked. [2021-10-16 03:06:23,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410161118] [2021-10-16 03:06:23,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410161118] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:06:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188381192] [2021-10-16 03:06:23,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 03:06:23,279 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:06:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:06:23,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:06:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 03:06:23,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 03:06:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:06:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 03:06:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:23,902 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 [2021-10-16 03:06:23,932 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 18 treesize of output 7 [2021-10-16 03:06:23,986 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:06:23,986 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 21 treesize of output 28 [2021-10-16 03:06:24,132 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 52 treesize of output 48 [2021-10-16 03:06:24,151 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:06:24,152 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 1 case distinctions, treesize of input 53 treesize of output 45 [2021-10-16 03:06:24,174 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 [2021-10-16 03:06:24,316 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:06:24,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:06:24,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:24,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-16 03:06:24,650 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:06:24,650 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 1 case distinctions, treesize of input 104 treesize of output 99 [2021-10-16 03:06:24,656 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 118 treesize of output 106 [2021-10-16 03:06:24,681 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:06:24,682 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 1 case distinctions, treesize of input 103 treesize of output 102 [2021-10-16 03:06:24,735 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-16 03:06:24,736 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 3 case distinctions, treesize of input 99 treesize of output 94 [2021-10-16 03:06:24,737 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-16 03:06:25,528 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-16 03:06:25,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 70 [2021-10-16 03:06:25,550 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:06:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2021-10-16 03:06:25,928 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-16 03:06:25,928 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 41 treesize of output 25 [2021-10-16 03:06:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:06:25,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:26,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:26,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-16 03:06:26,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:26,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-16 03:06:26,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:26,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-16 03:06:32,748 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0))) (_ bv1 32)))) is different from false [2021-10-16 03:06:32,799 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:32,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4208 [2021-10-16 03:08:34,832 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) is different from false [2021-10-16 03:08:34,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:34,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-16 03:08:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-16 03:08:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188381192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:08:40,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536974303] [2021-10-16 03:08:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 03:08:40,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:08:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:08:40,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:08:40,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 03:08:41,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 03:08:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:08:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 03:08:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:08:41,290 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 [2021-10-16 03:08:41,396 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-16 03:08:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-16 03:08:41,528 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:08:41,528 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 21 treesize of output 28 [2021-10-16 03:08:41,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-16 03:08:41,723 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-10-16 03:08:41,723 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 1 case distinctions, treesize of input 56 treesize of output 48 [2021-10-16 03:08:41,728 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 45 treesize of output 41 [2021-10-16 03:08:41,934 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:08:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 33 [2021-10-16 03:08:42,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:42,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-10-16 03:08:42,189 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:08:42,189 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 1 case distinctions, treesize of input 101 treesize of output 96 [2021-10-16 03:08:42,265 INFO L354 Elim1Store]: treesize reduction 230, result has 13.2 percent of original size [2021-10-16 03:08:42,265 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 3 case distinctions, treesize of input 115 treesize of output 110 [2021-10-16 03:08:42,270 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 104 treesize of output 92 [2021-10-16 03:08:42,295 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:08:42,295 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 1 case distinctions, treesize of input 89 treesize of output 88 [2021-10-16 03:08:42,296 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-16 03:08:43,120 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-16 03:08:43,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 67 [2021-10-16 03:08:43,145 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-16 03:08:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 48 [2021-10-16 03:08:43,473 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-16 03:08:43,473 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 41 treesize of output 25 [2021-10-16 03:08:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:08:43,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:08:43,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:43,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-16 03:08:43,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:43,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-10-16 03:08:43,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:43,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-16 03:08:46,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse0 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse0)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) is different from false [2021-10-16 03:08:46,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:08:46,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1040 [2021-10-16 03:09:10,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-10-16 03:09:10,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:10,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-16 03:09:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-10-16 03:09:12,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536974303] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:09:12,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:09:12,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11, 11, 11, 11] total 44 [2021-10-16 03:09:12,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051875528] [2021-10-16 03:09:12,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-16 03:09:12,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:09:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-16 03:09:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1125, Unknown=17, NotChecked=532, Total=1892 [2021-10-16 03:09:12,830 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:17,147 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset))) (let ((.cse2 (= c_ULTIMATE.start_main_~t~0.base v_ULTIMATE.start_main_~t~0.base_33)) (.cse1 (= .cse4 (_ bv0 32)))) (or (and (or (not .cse1) (not .cse2)) (or (= (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse4 v_DerPreprocessor_22)))) (store .cse3 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse3 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (and .cse2 (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32))))) (and .cse2 .cse1 (forall ((v_DerPreprocessor_19 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_22)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) v_DerPreprocessor_19) v_DerPreprocessor_21)))))))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse7 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse6 v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_25) .cse6 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse7)) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_27) .cse6 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse7))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse8 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse8 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse8 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse9 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse9 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse9 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))))) is different from false [2021-10-16 03:09:23,918 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse4 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse5 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse5)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse5))) (_ bv1 32)))) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse6 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse6 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse6 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-16 03:09:25,944 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse1 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) .cse0 v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_19) .cse0 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_21) .cse0 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse1))) (_ bv1 32))) (not (= .cse2 c_ULTIMATE.start_main_~p~0.base)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base .cse2)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~t~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~p~0.base)) (= (_ bv1 32) (select (select |c_#memory_int| .cse2) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)))) is different from false [2021-10-16 03:09:27,966 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse1) (_ bv4 32)))) (and (forall ((v_DerPreprocessor_20 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_33 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_34 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_34) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_22)))) (store .cse0 v_ULTIMATE.start_main_~t~0.base_33 (store (store (select .cse0 v_ULTIMATE.start_main_~t~0.base_33) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (= v_ULTIMATE.start_main_~t~0.base_33 v_ULTIMATE.start_main_~t~0.base_34) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_34)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~p~0.base)) (_ bv1 1))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (not (= .cse1 c_ULTIMATE.start_main_~p~0.base)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) (_ bv4 32)) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse1))))) (_ bv1 1))) (forall ((v_ULTIMATE.start_main_~t~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (= (_ bv1 32) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_39) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_39))))) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_20)) (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_19) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_21) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (_ bv1 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_37 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (= (select (select (let ((.cse4 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_37) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse4 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse4 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_37 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_37))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_36))) (= (let ((.cse5 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (select (select (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_25) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse5)) (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) v_DerPreprocessor_27) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse5))) (_ bv1 32)))) (not (= .cse1 .cse6)) (not (= c_ULTIMATE.start_main_~p~0.base .cse6)) (= (_ bv1 32) (select (select |c_#memory_int| .cse1) (_ bv0 32))) (forall ((v_ULTIMATE.start_main_~t~0.base_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_40 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_40 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_36)))))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_40))) (= (select (select (let ((.cse7 (store |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40 (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~t~0.base_40) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_28)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_36 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_36) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) (= (select (select |c_#memory_int| .cse6) (_ bv0 32)) (_ bv1 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))))) is different from false [2021-10-16 03:09:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:31,164 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-16 03:09:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:09:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 03:09:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:31,167 INFO L225 Difference]: With dead ends: 28 [2021-10-16 03:09:31,167 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 03:09:31,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 82700.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1320, Unknown=21, NotChecked=946, Total=2550 [2021-10-16 03:09:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 03:09:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-16 03:09:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2021-10-16 03:09:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-16 03:09:31,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-10-16 03:09:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:31,177 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-16 03:09:31,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:09:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-16 03:09:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:09:31,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:31,178 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-16 03:09:31,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 03:09:31,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:09:31,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 03:09:31,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:09:31,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:09:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash 134691839, now seen corresponding path program 5 times [2021-10-16 03:09:31,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:09:31,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975483599] [2021-10-16 03:09:31,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 03:09:31,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:09:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:09:31,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:09:31,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 03:09:32,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 03:09:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:09:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-16 03:09:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:09:32,322 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 [2021-10-16 03:09:32,386 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 [2021-10-16 03:09:32,398 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 [2021-10-16 03:09:32,485 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:09:32,485 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 [2021-10-16 03:09:32,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:32,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-10-16 03:09:32,707 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:09:32,708 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 1 case distinctions, treesize of input 78 treesize of output 81 [2021-10-16 03:09:32,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:32,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-16 03:09:32,751 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:09:32,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2021-10-16 03:09:32,916 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:09:32,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-10-16 03:09:33,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:33,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-16 03:09:33,257 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-16 03:09:33,257 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 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-16 03:09:33,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:33,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-16 03:09:33,323 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-16 03:09:33,324 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 3 case distinctions, treesize of input 92 treesize of output 98 [2021-10-16 03:09:36,633 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-16 03:09:36,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 100 [2021-10-16 03:09:36,682 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-16 03:09:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 51 [2021-10-16 03:09:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:36,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:09:37,223 INFO L354 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2021-10-16 03:09:37,223 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 52 treesize of output 51 [2021-10-16 03:09:37,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:37,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-10-16 03:09:37,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:37,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-10-16 03:09:40,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_42 (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_42 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_41) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset))) (.cse5 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_42 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_40) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base))) (.cse6 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse5 c_ULTIMATE.start_main_~p~0.base) .cse6)) (.cse4 (bvadd (select (select .cse2 c_ULTIMATE.start_main_~p~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4)) (.cse1 (select (select .cse2 .cse3) .cse4))) (or (and (= .cse0 (_ bv0 32)) (= (_ bv0 32) .cse1)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_42))) (and (= c_ULTIMATE.start_main_~p~0.base .cse0) (= c_ULTIMATE.start_main_~p~0.offset .cse1))))))) is different from false [2021-10-16 03:09:40,727 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:40,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 517 [2021-10-16 03:09:40,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:40,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 537 [2021-10-16 03:10:08,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_43 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_42 (_ BitVec 32))) (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_43 (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~t~0.base_43) (_ bv0 32) v_DerPreprocessor_42) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)))) (store .cse7 v_ULTIMATE.start_main_~t~0.base_42 (store (store (select .cse7 v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_41) (_ bv4 32) (_ bv0 32))))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_43 (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~t~0.base_43) (_ bv0 32) v_DerPreprocessor_43) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)))) (store .cse6 v_ULTIMATE.start_main_~t~0.base_42 (store (store (select .cse6 v_ULTIMATE.start_main_~t~0.base_42) (_ bv0 32) v_DerPreprocessor_40) (_ bv4 32) v_ULTIMATE.start_main_~t~0.base_43))))) (let ((.cse3 (select (select .cse2 v_ULTIMATE.start_main_~t~0.base_43) (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 v_ULTIMATE.start_main_~t~0.base_43) (_ bv4 32))))) (let ((.cse1 (= (_ bv0 32) (select (select .cse5 .cse3) .cse4))) (.cse0 (select (select .cse2 .cse3) .cse4))) (or (and (= (_ bv0 32) .cse0) .cse1) (and .cse1 (= v_ULTIMATE.start_main_~t~0.base_43 .cse0)) (not (= (_ bv0 1) (select (store |c_#valid| v_ULTIMATE.start_main_~t~0.base_43 (_ bv1 1)) v_ULTIMATE.start_main_~t~0.base_42))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_43)))))))) is different from false [2021-10-16 03:10:08,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:08,963 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 1180238 treesize of output 1158676 [2021-10-16 03:10:21,062 WARN L207 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 467 DAG size of output: 409 [2021-10-16 03:10:21,288 INFO L354 Elim1Store]: treesize reduction 30, result has 52.4 percent of original size [2021-10-16 03:10:21,290 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 224526 treesize of output 223758 [2021-10-16 03:10:42,438 WARN L207 SmtUtils]: Spent 21.15 s on a formula simplification. DAG size of input: 1090 DAG size of output: 1053 [2021-10-16 03:10:42,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:10:42,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975483599] [2021-10-16 03:10:42,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:10:42,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358592447] [2021-10-16 03:10:42,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 03:10:42,450 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:10:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:10:42,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:10:42,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 03:10:43,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 03:10:43,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:10:43,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 03:10:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:10:43,275 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 [2021-10-16 03:10:43,320 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 [2021-10-16 03:10:43,328 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:10:43,390 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:10:43,390 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 [2021-10-16 03:10:43,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:43,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-16 03:10:43,590 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:10:43,591 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 1 case distinctions, treesize of input 76 treesize of output 79 [2021-10-16 03:10:43,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:43,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-16 03:10:43,618 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:10:43,619 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 1 case distinctions, treesize of input 66 treesize of output 69 [2021-10-16 03:10:43,722 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:10:43,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2021-10-16 03:10:43,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:43,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-16 03:10:43,946 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-16 03:10:43,946 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 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-16 03:10:43,957 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-16 03:10:43,957 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 104 treesize of output 95 [2021-10-16 03:10:43,997 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-16 03:10:43,997 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 89 treesize of output 91 [2021-10-16 03:10:44,959 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-16 03:10:44,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 89 [2021-10-16 03:10:45,009 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-16 03:10:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 44 [2021-10-16 03:10:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:10:45,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:10:45,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:45,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-16 03:10:45,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:45,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-16 03:11:19,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:19,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-10-16 03:11:19,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:19,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-16 03:11:19,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_48 [2021-10-16 03:11:19,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857090235] [2021-10-16 03:11:19,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 03:11:19,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:19,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:19,443 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:19,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 03:11:20,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-16 03:11:20,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:11:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 03:11:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:20,256 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 [2021-10-16 03:11:20,298 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 [2021-10-16 03:11:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:20,361 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:11:20,362 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 [2021-10-16 03:11:20,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:20,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-10-16 03:11:20,561 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:11:20,561 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 1 case distinctions, treesize of input 74 treesize of output 77 [2021-10-16 03:11:20,568 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 76 treesize of output 64 [2021-10-16 03:11:20,586 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:11:20,587 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 1 case distinctions, treesize of input 61 treesize of output 60 [2021-10-16 03:11:20,732 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:11:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-10-16 03:11:20,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:20,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-16 03:11:20,946 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-16 03:11:20,947 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 3 case distinctions, treesize of input 90 treesize of output 87 [2021-10-16 03:11:20,955 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-16 03:11:20,955 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 104 treesize of output 95 [2021-10-16 03:11:20,991 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-16 03:11:20,992 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 89 treesize of output 91 [2021-10-16 03:11:21,719 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-16 03:11:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 89 [2021-10-16 03:11:21,767 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-16 03:11:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 44 [2021-10-16 03:11:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:21,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:21,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-16 03:11:21,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-10-16 03:11:44,989 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:44,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 272 [2021-10-16 03:11:44,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:44,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 274 [2021-10-16 03:11:45,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_48 [2021-10-16 03:11:45,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:45,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:11:45,220 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:11:45,220 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:11:45,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:11:45,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:45,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-16 03:11:45,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:45,838 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:11:45,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:11:45 BoogieIcfgContainer [2021-10-16 03:11:45,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:11:45,851 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:11:45,851 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:11:45,851 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:11:45,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:25" (3/4) ... [2021-10-16 03:11:45,853 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:11:45,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:11:45,854 INFO L168 Benchmark]: Toolchain (without parser) took 441219.17 ms. Allocated memory was 54.5 MB in the beginning and 574.6 MB in the end (delta: 520.1 MB). Free memory was 29.5 MB in the beginning and 409.6 MB in the end (delta: -380.1 MB). Peak memory consumption was 139.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,854 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.4 MB in the beginning and 34.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:45,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 753.61 ms. Allocated memory is still 54.5 MB. Free memory was 29.3 MB in the beginning and 30.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.55 ms. Allocated memory is still 54.5 MB. Free memory was 30.4 MB in the beginning and 28.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,855 INFO L168 Benchmark]: Boogie Preprocessor took 58.20 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 28.5 MB in the beginning and 49.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,856 INFO L168 Benchmark]: RCFGBuilder took 440.89 ms. Allocated memory is still 67.1 MB. Free memory was 49.0 MB in the beginning and 38.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,856 INFO L168 Benchmark]: TraceAbstraction took 439881.47 ms. Allocated memory was 67.1 MB in the beginning and 574.6 MB in the end (delta: 507.5 MB). Free memory was 38.2 MB in the beginning and 410.6 MB in the end (delta: -372.4 MB). Peak memory consumption was 133.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,856 INFO L168 Benchmark]: Witness Printer took 2.72 ms. Allocated memory is still 574.6 MB. Free memory was 410.6 MB in the beginning and 409.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:45,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.4 MB in the beginning and 34.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 753.61 ms. Allocated memory is still 54.5 MB. Free memory was 29.3 MB in the beginning and 30.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.55 ms. Allocated memory is still 54.5 MB. Free memory was 30.4 MB in the beginning and 28.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.20 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 28.5 MB in the beginning and 49.0 MB in the end (delta: -20.4 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 440.89 ms. Allocated memory is still 67.1 MB. Free memory was 49.0 MB in the beginning and 38.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 439881.47 ms. Allocated memory was 67.1 MB in the beginning and 574.6 MB in the end (delta: 507.5 MB). Free memory was 38.2 MB in the beginning and 410.6 MB in the end (delta: -372.4 MB). Peak memory consumption was 133.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.72 ms. Allocated memory is still 574.6 MB. Free memory was 410.6 MB in the beginning and 409.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 543]: 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: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND TRUE p->h != 1 [L543] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 439805.5ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 14.1ms, AutomataDifference: 36444.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 64 SDtfs, 37 SDslu, 242 SDs, 0 SdLazy, 452 SolverSat, 29 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10361.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 297 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 23 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 134175.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 145.6ms SsaConstructionTime, 696.9ms SatisfiabilityAnalysisTime, 262571.6ms InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 408 ConstructedInterpolants, 74 QuantifiedInterpolants, 10113 SizeOfPredicates, 118 NumberOfNonLiveVariables, 840 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 55/248 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 [2021-10-16 03:11:45,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cfbda33-9f76-4b5f-a0fc-7923f13281e7/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...