./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8 --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 495c0a8d92ee0996091cacb8f0345f4ec1c2207f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8 --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 495c0a8d92ee0996091cacb8f0345f4ec1c2207f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:26:27,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:27,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:27,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:27,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:27,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:27,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:27,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:27,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:27,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:27,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:27,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:27,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:27,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:27,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:27,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:27,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:27,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:27,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:27,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:27,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:27,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:27,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:27,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:27,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:27,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:27,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:27,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:27,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:27,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:27,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:27,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:27,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:27,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:27,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:27,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:27,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:27,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:27,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:27,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:27,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:27,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:26:27,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:27,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:27,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:27,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:27,542 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:27,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:27,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:26:27,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:27,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:27,543 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:26:27,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:26:27,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:27,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:26:27,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:26:27,545 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:26:27,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:27,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:27,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:26:27,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:27,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:27,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:27,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:27,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:27,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:27,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:27,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:27,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:27,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:27,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:27,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:27,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:27,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:27,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:27,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:27,551 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:26:27,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:26:27,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:27,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:27,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:27,553 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_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 495c0a8d92ee0996091cacb8f0345f4ec1c2207f [2021-10-13 07:26:27,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:27,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:27,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:27,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:27,861 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:27,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-13 07:26:27,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/cca5df6e2/6177c48fa3754ff2b09af20a2f4f782c/FLAG64d410b5c [2021-10-13 07:26:28,385 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:28,386 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-13 07:26:28,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/cca5df6e2/6177c48fa3754ff2b09af20a2f4f782c/FLAG64d410b5c [2021-10-13 07:26:28,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/cca5df6e2/6177c48fa3754ff2b09af20a2f4f782c [2021-10-13 07:26:28,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:28,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:28,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:28,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:28,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:28,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:28" (1/1) ... [2021-10-13 07:26:28,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7854563a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:28, skipping insertion in model container [2021-10-13 07:26:28,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:28" (1/1) ... [2021-10-13 07:26:28,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:28,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:28,980 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_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-13 07:26:29,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:29,027 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:29,039 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_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-13 07:26:29,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:29,064 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:29,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29 WrapperNode [2021-10-13 07:26:29,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:29,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:29,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:29,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:29,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:29,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:29,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:29,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:29,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:29,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:29,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:29,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:29,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:29,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:29,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:26:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:26:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:26:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:29,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:29,615 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:26:29,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:29 BoogieIcfgContainer [2021-10-13 07:26:29,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:29,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:29,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:29,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:29,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:28" (1/3) ... [2021-10-13 07:26:29,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d39b71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:29, skipping insertion in model container [2021-10-13 07:26:29,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29" (2/3) ... [2021-10-13 07:26:29,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d39b71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:29, skipping insertion in model container [2021-10-13 07:26:29,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:29" (3/3) ... [2021-10-13 07:26:29,630 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2021-10-13 07:26:29,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:29,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:26:29,683 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:29,694 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 [2021-10-13 07:26:29,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:26:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:26:29,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:29,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:29,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:29,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1252423112, now seen corresponding path program 1 times [2021-10-13 07:26:29,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:29,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270398828] [2021-10-13 07:26:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:29,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:29,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:26:29,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389421807] [2021-10-13 07:26:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:29,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:29,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:29,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:26:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:30,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:30,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:30,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270398828] [2021-10-13 07:26:30,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:26:30,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389421807] [2021-10-13 07:26:30,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389421807] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:30,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:30,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:26:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222745789] [2021-10-13 07:26:30,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:30,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:30,178 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-10-13 07:26:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:30,253 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2021-10-13 07:26:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 8 [2021-10-13 07:26:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:30,263 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:26:30,263 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 07:26:30,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 07:26:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 07:26:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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) [2021-10-13 07:26:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-10-13 07:26:30,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 8 [2021-10-13 07:26:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:30,306 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-10-13 07:26:30,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-10-13 07:26:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-10-13 07:26:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:26:30,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:30,309 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:30,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:30,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:26:30,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -728109218, now seen corresponding path program 1 times [2021-10-13 07:26:30,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:30,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605101118] [2021-10-13 07:26:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:30,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:30,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:26:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620525148] [2021-10-13 07:26:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:30,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:30,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:30,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:26:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:30,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:26:30,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:30,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605101118] [2021-10-13 07:26:30,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:26:30,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620525148] [2021-10-13 07:26:30,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620525148] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:30,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:30,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:26:30,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867662474] [2021-10-13 07:26:30,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:30,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:30,711 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-10-13 07:26:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:30,794 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2021-10-13 07:26:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:26:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:30,796 INFO L225 Difference]: With dead ends: 50 [2021-10-13 07:26:30,796 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:26:30,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:26:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-13 07:26:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2021-10-13 07:26:30,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 12 [2021-10-13 07:26:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:30,807 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2021-10-13 07:26:30,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-10-13 07:26:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2021-10-13 07:26:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:26:30,808 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:30,809 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:31,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:31,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 839594166, now seen corresponding path program 1 times [2021-10-13 07:26:31,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604847190] [2021-10-13 07:26:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:26:31,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250805640] [2021-10-13 07:26:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:31,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:31,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:26:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 07:26:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 07:26:31,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604847190] [2021-10-13 07:26:31,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:26:31,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250805640] [2021-10-13 07:26:31,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250805640] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:31,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:26:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588328700] [2021-10-13 07:26:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:31,281 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2021-10-13 07:26:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:31,370 INFO L93 Difference]: Finished difference Result 84 states and 131 transitions. [2021-10-13 07:26:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 20 [2021-10-13 07:26:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,372 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:26:31,372 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:26:31,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:26:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-13 07:26:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2021-10-13 07:26:31,395 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2021-10-13 07:26:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2021-10-13 07:26:31,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2021-10-13 07:26:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2021-10-13 07:26:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:26:31,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,400 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:31,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:31,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:31,625 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1907601738, now seen corresponding path program 1 times [2021-10-13 07:26:31,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897715861] [2021-10-13 07:26:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:26:31,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582662477] [2021-10-13 07:26:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:31,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:31,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:26:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 07:26:31,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 07:26:31,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897715861] [2021-10-13 07:26:31,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:26:31,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582662477] [2021-10-13 07:26:31,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582662477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:31,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136800003] [2021-10-13 07:26:32,017 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 07:26:32,017 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:26:32,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:26:32,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:26:32,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:26:32,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,067 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:32,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:26:32,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:32,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-13 07:26:32,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 218 [2021-10-13 07:26:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:32,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 38 [2021-10-13 07:26:32,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-13 07:26:32,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-13 07:26:32,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:26:32,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:32,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:32,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-10-13 07:26:32,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:26:32,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:215, output treesize:222 [2021-10-13 07:26:32,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:32,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:32,517 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_30| 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) [2021-10-13 07:26:32,520 INFO L168 Benchmark]: Toolchain (without parser) took 3733.25 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 68.5 MB in the beginning and 89.8 MB in the end (delta: -21.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,520 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:32,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.71 ms. Allocated memory is still 100.7 MB. Free memory was 68.3 MB in the beginning and 76.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 74.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,522 INFO L168 Benchmark]: Boogie Preprocessor took 27.88 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 73.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,522 INFO L168 Benchmark]: RCFGBuilder took 486.75 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 58.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,523 INFO L168 Benchmark]: TraceAbstraction took 2899.75 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 58.1 MB in the beginning and 89.8 MB in the end (delta: -31.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:32,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.71 ms. Allocated memory is still 100.7 MB. Free memory was 68.3 MB in the beginning and 76.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 74.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.88 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 73.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 486.75 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 58.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2899.75 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 58.1 MB in the beginning and 89.8 MB in the end (delta: -31.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_30| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_30|: 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. [2021-10-13 07:26:32,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 07:26:34,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:34,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:35,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:35,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:35,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:35,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:35,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:35,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:35,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:35,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:35,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:35,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:35,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:35,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:35,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:35,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:35,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:35,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:35,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:35,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:35,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:35,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:35,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:35,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:35,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:35,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:35,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:35,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:35,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:35,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:35,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:35,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:35,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:35,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:35,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:35,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:35,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:35,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:35,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:35,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:35,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:26:35,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:35,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:35,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:35,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:35,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:35,172 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:35,172 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:35,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:35,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:35,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:35,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:35,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:35,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:35,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:35,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:35,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:35,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:35,177 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:26:35,177 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:26:35,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:35,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:35,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:35,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:35,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:35,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:26:35,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:35,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:35,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:35,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:35,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:35,181 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:26:35,181 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:35,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:35,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:35,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:35,182 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_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 495c0a8d92ee0996091cacb8f0345f4ec1c2207f [2021-10-13 07:26:35,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:35,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:35,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:35,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:35,617 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:35,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-13 07:26:35,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/78c92f0be/fdd9d5d095904ee3beaf7530af37bcdb/FLAG0afc2388a [2021-10-13 07:26:36,254 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:36,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-13 07:26:36,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/78c92f0be/fdd9d5d095904ee3beaf7530af37bcdb/FLAG0afc2388a [2021-10-13 07:26:36,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/data/78c92f0be/fdd9d5d095904ee3beaf7530af37bcdb [2021-10-13 07:26:36,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:36,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:36,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:36,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:36,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:36,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129e65c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36, skipping insertion in model container [2021-10-13 07:26:36,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:36,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:36,778 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_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-13 07:26:36,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:36,810 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:36,822 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_75d0d393-d603-458b-b7f9-def2d344a20c/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-13 07:26:36,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:36,850 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:36,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36 WrapperNode [2021-10-13 07:26:36,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:36,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:36,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:36,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:36,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:36,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:36,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:36,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:36,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:36,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:36,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:36,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:36,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (1/1) ... [2021-10-13 07:26:36,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:36,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:36,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:37,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:26:37,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:26:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:37,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:26:37,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:37,653 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:26:37,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:37 BoogieIcfgContainer [2021-10-13 07:26:37,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:37,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:37,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:37,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:37,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:36" (1/3) ... [2021-10-13 07:26:37,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ced4863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:37, skipping insertion in model container [2021-10-13 07:26:37,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:36" (2/3) ... [2021-10-13 07:26:37,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ced4863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:37, skipping insertion in model container [2021-10-13 07:26:37,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:37" (3/3) ... [2021-10-13 07:26:37,666 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2021-10-13 07:26:37,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:37,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:26:37,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:37,744 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 [2021-10-13 07:26:37,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:26:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:37,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:37,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:37,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:37,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-10-13 07:26:37,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:37,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202074225] [2021-10-13 07:26:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:37,783 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:37,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:37,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:26:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:26:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:37,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:38,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202074225] [2021-10-13 07:26:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202074225] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:38,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:38,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:26:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886745802] [2021-10-13 07:26:38,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:26:38,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:26:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:38,075 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-10-13 07:26:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:38,110 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-10-13 07:26:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:26:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) Word has length 11 [2021-10-13 07:26:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:38,121 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:26:38,121 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:26:38,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:26:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:26:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-10-13 07:26:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-10-13 07:26:38,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-10-13 07:26:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:38,153 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-10-13 07:26:38,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-10-13 07:26:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-10-13 07:26:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:38,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:38,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:38,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 07:26:38,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:38,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-10-13 07:26:38,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:38,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107411763] [2021-10-13 07:26:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:38,373 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:38,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:38,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:38,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:26:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:38,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:38,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:38,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:38,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107411763] [2021-10-13 07:26:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107411763] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:38,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:38,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:26:38,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178844490] [2021-10-13 07:26:38,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:38,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:38,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:38,605 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:38,886 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-10-13 07:26:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:26:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:38,894 INFO L225 Difference]: With dead ends: 45 [2021-10-13 07:26:38,894 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:26:38,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:26:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 07:26:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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) [2021-10-13 07:26:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-13 07:26:38,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-10-13 07:26:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:38,902 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-13 07:26:38,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-13 07:26:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:26:38,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:38,904 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:38,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:39,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:39,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash 742035169, now seen corresponding path program 1 times [2021-10-13 07:26:39,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:39,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529831106] [2021-10-13 07:26:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:39,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:39,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:39,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:26:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:26:39,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:26:39,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:39,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529831106] [2021-10-13 07:26:39,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529831106] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:39,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:39,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:39,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579401808] [2021-10-13 07:26:39,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:39,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:39,441 INFO L87 Difference]: Start difference. First operand 29 states and 39 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) [2021-10-13 07:26:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:39,827 INFO L93 Difference]: Finished difference Result 75 states and 106 transitions. [2021-10-13 07:26:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:39,828 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 17 [2021-10-13 07:26:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:39,829 INFO L225 Difference]: With dead ends: 75 [2021-10-13 07:26:39,829 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:26:39,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:26:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-13 07:26:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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) [2021-10-13 07:26:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-10-13 07:26:39,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 17 [2021-10-13 07:26:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:39,854 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-10-13 07:26:39,854 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) [2021-10-13 07:26:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-10-13 07:26:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:26:39,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:39,859 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:39,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:40,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:40,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1930294047, now seen corresponding path program 1 times [2021-10-13 07:26:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:40,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636390698] [2021-10-13 07:26:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:40,073 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:40,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:40,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:26:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:26:40,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:26:40,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:40,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636390698] [2021-10-13 07:26:40,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636390698] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:40,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:40,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:26:40,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983043420] [2021-10-13 07:26:40,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:40,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:40,504 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:40,905 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2021-10-13 07:26:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 07:26:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:40,907 INFO L225 Difference]: With dead ends: 114 [2021-10-13 07:26:40,907 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 07:26:40,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 07:26:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-13 07:26:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 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) [2021-10-13 07:26:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-10-13 07:26:40,933 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 29 [2021-10-13 07:26:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:40,933 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-10-13 07:26:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-10-13 07:26:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:26:40,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:40,935 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:40,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:41,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:41,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash 863846625, now seen corresponding path program 1 times [2021-10-13 07:26:41,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:41,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279813824] [2021-10-13 07:26:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:41,137 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:41,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:41,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:41,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:26:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 07:26:41,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 07:26:41,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:41,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279813824] [2021-10-13 07:26:41,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279813824] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:41,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100499135] [2021-10-13 07:26:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:41,699 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:41,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:41,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:26:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 07:26:42,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 07:26:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100499135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:42,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869458811] [2021-10-13 07:26:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:42,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:42,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:42,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:26:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:42,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 07:26:42,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 07:26:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869458811] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:42,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:26:42,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 07:26:42,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358947552] [2021-10-13 07:26:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:26:42,805 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:43,135 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-10-13 07:26:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 07:26:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:43,138 INFO L225 Difference]: With dead ends: 129 [2021-10-13 07:26:43,138 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:26:43,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:26:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:26:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-10-13 07:26:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 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) [2021-10-13 07:26:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-10-13 07:26:43,166 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 37 [2021-10-13 07:26:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:43,167 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-10-13 07:26:43,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-10-13 07:26:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 07:26:43,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:43,170 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:43,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:43,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:43,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:43,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:43,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash -986570111, now seen corresponding path program 1 times [2021-10-13 07:26:43,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:43,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354364097] [2021-10-13 07:26:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:43,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:43,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:26:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:44,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:44,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:44,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354364097] [2021-10-13 07:26:44,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354364097] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:44,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385801151] [2021-10-13 07:26:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:44,526 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:44,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:44,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:26:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:44,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:45,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 07:26:45,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385801151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:45,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245824581] [2021-10-13 07:26:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:45,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:45,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:45,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:26:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-13 07:26:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-13 07:26:46,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245824581] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:46,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:26:46,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2021-10-13 07:26:46,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38339026] [2021-10-13 07:26:46,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 07:26:46,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 07:26:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:26:46,379 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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) [2021-10-13 07:26:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:51,715 INFO L93 Difference]: Finished difference Result 510 states and 706 transitions. [2021-10-13 07:26:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 07:26:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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 63 [2021-10-13 07:26:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:51,719 INFO L225 Difference]: With dead ends: 510 [2021-10-13 07:26:51,719 INFO L226 Difference]: Without dead ends: 436 [2021-10-13 07:26:51,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2045.1ms TimeCoverageRelationStatistics Valid=1007, Invalid=2653, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 07:26:51,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-10-13 07:26:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2021-10-13 07:26:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 364 states have internal predecessors, (437), 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) [2021-10-13 07:26:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-10-13 07:26:51,821 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 63 [2021-10-13 07:26:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:51,821 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-10-13 07:26:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 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) [2021-10-13 07:26:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-10-13 07:26:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-13 07:26:51,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:51,835 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:51,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:52,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-13 07:26:52,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:52,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:52,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2136079359, now seen corresponding path program 2 times [2021-10-13 07:26:52,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:52,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472239573] [2021-10-13 07:26:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:52,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:52,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:52,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:26:53,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:26:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 07:26:53,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 07:26:54,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:54,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472239573] [2021-10-13 07:26:54,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472239573] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:54,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341748951] [2021-10-13 07:26:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:54,870 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:54,873 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:54,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:26:56,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:26:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 07:26:56,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 07:26:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341748951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:57,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431835091] [2021-10-13 07:26:57,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:26:57,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:57,509 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:57,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:26:58,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:26:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:26:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:26:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-13 07:26:59,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-13 07:27:00,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431835091] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:00,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:00,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 24 [2021-10-13 07:27:00,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048329285] [2021-10-13 07:27:00,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 07:27:00,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 07:27:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-10-13 07:27:00,765 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 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) [2021-10-13 07:27:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:10,936 INFO L93 Difference]: Finished difference Result 1502 states and 2144 transitions. [2021-10-13 07:27:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-13 07:27:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 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 239 [2021-10-13 07:27:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:10,944 INFO L225 Difference]: With dead ends: 1502 [2021-10-13 07:27:10,944 INFO L226 Difference]: Without dead ends: 1148 [2021-10-13 07:27:10,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 1406 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 6468.7ms TimeCoverageRelationStatistics Valid=2944, Invalid=9938, Unknown=0, NotChecked=0, Total=12882 [2021-10-13 07:27:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-13 07:27:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1121. [2021-10-13 07:27:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.1330357142857144) internal successors, (1269), 1120 states have internal predecessors, (1269), 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) [2021-10-13 07:27:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1269 transitions. [2021-10-13 07:27:11,094 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1269 transitions. Word has length 239 [2021-10-13 07:27:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:11,097 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1269 transitions. [2021-10-13 07:27:11,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 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) [2021-10-13 07:27:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1269 transitions. [2021-10-13 07:27:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-10-13 07:27:11,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:11,126 INFO L512 BasicCegarLoop]: trace histogram [504, 168, 36, 36, 36, 12, 12, 12, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:11,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 07:27:11,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:11,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 07:27:11,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:11,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1126566913, now seen corresponding path program 3 times [2021-10-13 07:27:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:11,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779177825] [2021-10-13 07:27:11,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:27:11,738 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:11,739 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:11,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:27:15,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-13 07:27:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:27:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:27:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-13 07:27:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-13 07:27:20,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:20,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779177825] [2021-10-13 07:27:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779177825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:20,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232894998] [2021-10-13 07:27:20,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:27:20,889 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:20,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:20,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:27:30,247 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() [2021-10-13 07:27:30,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 134 [2021-10-13 07:27:30,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:30,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:27:30,449 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.annotateAndAssertOutsideLoopFirst2(AnnotateAndAsserterWithStmtOrderPrioritization.java:277) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserterWithStmtOrderPrioritization.java:214) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:312) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 32 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 40 more [2021-10-13 07:27:30,453 INFO L168 Benchmark]: Toolchain (without parser) took 53837.36 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 54.5 MB in the beginning and 41.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,453 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 73.4 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:27:30,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.50 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 43.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.44 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 41.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,454 INFO L168 Benchmark]: Boogie Preprocessor took 30.17 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 40.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,455 INFO L168 Benchmark]: RCFGBuilder took 734.02 ms. Allocated memory is still 73.4 MB. Free memory was 40.5 MB in the beginning and 46.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,455 INFO L168 Benchmark]: TraceAbstraction took 52792.74 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 46.2 MB in the beginning and 41.4 MB in the end (delta: 4.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:27:30,457 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 73.4 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.50 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 43.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.44 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 41.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.17 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 40.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 734.02 ms. Allocated memory is still 73.4 MB. Free memory was 40.5 MB in the beginning and 46.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 52792.74 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 46.2 MB in the beginning and 41.4 MB in the end (delta: 4.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() : de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:27:30,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75d0d393-d603-458b-b7f9-def2d344a20c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...