./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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-5709675 [2021-10-16 02:45:17,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:45:17,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:45:17,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:45:17,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:45:17,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:45:17,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:45:17,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:45:17,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:45:17,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:45:17,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:45:17,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:45:17,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:45:17,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:45:17,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:45:17,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:45:17,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:45:17,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:45:17,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:45:17,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:45:17,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:45:17,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:45:17,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:45:17,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:45:17,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:45:17,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:45:17,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:45:17,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:45:17,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:45:17,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:45:17,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:45:17,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:45:17,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:45:17,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:45:17,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:45:17,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:45:17,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:45:17,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:45:17,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:45:17,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:45:17,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:45:17,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:45:17,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:45:17,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:45:17,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:45:17,760 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:45:17,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:45:17,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:45:17,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:45:17,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:45:17,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:45:17,762 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:45:17,763 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:45:17,763 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:45:17,764 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:45:17,764 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:45:17,764 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:45:17,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:45:17,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:45:17,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:45:17,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:45:17,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:45:17,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:45:17,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:45:17,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:45:17,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:45:17,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:45:17,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:45:17,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:45:17,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:45:17,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:45:17,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:45:17,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:17,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:45:17,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:45:17,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:45:17,772 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:45:17,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:45:17,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:45:17,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:45:17,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:45:17,773 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 [2021-10-16 02:45:18,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:45:18,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:45:18,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:45:18,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:45:18,154 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:45:18,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-16 02:45:18,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/f13c0d90f/5dc9b8b88bdc46dbb6244bed1278c9f3/FLAG3fef02344 [2021-10-16 02:45:18,918 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:45:18,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-16 02:45:18,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/f13c0d90f/5dc9b8b88bdc46dbb6244bed1278c9f3/FLAG3fef02344 [2021-10-16 02:45:19,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/f13c0d90f/5dc9b8b88bdc46dbb6244bed1278c9f3 [2021-10-16 02:45:19,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:45:19,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:45:19,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:19,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:45:19,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:45:19,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514d9e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19, skipping insertion in model container [2021-10-16 02:45:19,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:45:19,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:45:19,578 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-16 02:45:19,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:19,614 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:45:19,627 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-16 02:45:19,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:19,681 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:45:19,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19 WrapperNode [2021-10-16 02:45:19,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:19,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:19,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:45:19,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:45:19,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:19,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:45:19,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:45:19,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:45:19,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:45:19,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:45:19,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:45:19,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:45:19,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (1/1) ... [2021-10-16 02:45:19,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:19,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:45:19,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:45:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:45:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:45:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:45:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:45:20,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:45:20,611 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-16 02:45:20,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:20 BoogieIcfgContainer [2021-10-16 02:45:20,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:45:20,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:45:20,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:45:20,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:45:20,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:45:19" (1/3) ... [2021-10-16 02:45:20,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20688b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:20, skipping insertion in model container [2021-10-16 02:45:20,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:19" (2/3) ... [2021-10-16 02:45:20,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20688b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:20, skipping insertion in model container [2021-10-16 02:45:20,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:20" (3/3) ... [2021-10-16 02:45:20,627 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-10-16 02:45:20,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:45:20,634 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:45:20,723 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:45:20,745 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:45:20,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:45:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:45:20,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:20,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:20,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:20,778 INFO L82 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2021-10-16 02:45:20,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:20,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675537785] [2021-10-16 02:45:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:20,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:20,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:45:20,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227225712] [2021-10-16 02:45:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:20,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:20,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:20,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:20,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:45:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:21,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:21,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675537785] [2021-10-16 02:45:21,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:45:21,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227225712] [2021-10-16 02:45:21,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227225712] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:21,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:21,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:45:21,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16415662] [2021-10-16 02:45:21,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:21,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:21,157 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:21,263 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2021-10-16 02:45:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 9 [2021-10-16 02:45:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:21,276 INFO L225 Difference]: With dead ends: 36 [2021-10-16 02:45:21,276 INFO L226 Difference]: Without dead ends: 21 [2021-10-16 02:45:21,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-16 02:45:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-16 02:45:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 34 transitions. [2021-10-16 02:45:21,320 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 34 transitions. Word has length 9 [2021-10-16 02:45:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:21,321 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 34 transitions. [2021-10-16 02:45:21,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 34 transitions. [2021-10-16 02:45:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:45:21,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:21,323 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:21,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:21,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:45:21,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -521491338, now seen corresponding path program 1 times [2021-10-16 02:45:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:21,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772395532] [2021-10-16 02:45:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:21,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:21,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:45:21,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361749546] [2021-10-16 02:45:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:21,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:21,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:45:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:45:21,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:45:21,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772395532] [2021-10-16 02:45:21,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:45:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361749546] [2021-10-16 02:45:21,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361749546] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:21,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:21,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:45:21,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895890149] [2021-10-16 02:45:21,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:21,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:21,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:21,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:21,756 INFO L87 Difference]: Start difference. First operand 21 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:21,881 INFO L93 Difference]: Finished difference Result 60 states and 101 transitions. [2021-10-16 02:45:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:21,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 13 [2021-10-16 02:45:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:21,885 INFO L225 Difference]: With dead ends: 60 [2021-10-16 02:45:21,885 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:45:21,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:45:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-10-16 02:45:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2021-10-16 02:45:21,899 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 13 [2021-10-16 02:45:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:21,913 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2021-10-16 02:45:21,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2021-10-16 02:45:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:45:21,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:21,915 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:21,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:22,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:22,143 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -13861158, now seen corresponding path program 1 times [2021-10-16 02:45:22,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:22,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982616094] [2021-10-16 02:45:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:22,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:22,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:45:22,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869575597] [2021-10-16 02:45:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:22,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:22,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:22,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:45:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:45:22,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:45:22,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:22,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982616094] [2021-10-16 02:45:22,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:45:22,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869575597] [2021-10-16 02:45:22,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869575597] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:22,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:22,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:45:22,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907376020] [2021-10-16 02:45:22,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:22,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:22,469 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:22,650 INFO L93 Difference]: Finished difference Result 89 states and 145 transitions. [2021-10-16 02:45:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:22,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:45:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:22,656 INFO L225 Difference]: With dead ends: 89 [2021-10-16 02:45:22,657 INFO L226 Difference]: Without dead ends: 61 [2021-10-16 02:45:22,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-16 02:45:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-10-16 02:45:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2021-10-16 02:45:22,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 21 [2021-10-16 02:45:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2021-10-16 02:45:22,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2021-10-16 02:45:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:45:22,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:22,692 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:22,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:22,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:22,914 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1865855654, now seen corresponding path program 1 times [2021-10-16 02:45:22,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:22,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414426498] [2021-10-16 02:45:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:22,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:22,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:45:22,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713124150] [2021-10-16 02:45:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:22,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:22,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:22,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:22,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:45:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:23,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:45:23,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:45:23,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:23,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414426498] [2021-10-16 02:45:23,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:45:23,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713124150] [2021-10-16 02:45:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713124150] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:23,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340306763] [2021-10-16 02:45:23,285 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-16 02:45:23,286 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:45:23,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:45:23,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:45:23,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:45:23,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,356 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:23,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-16 02:45:23,360 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:23,361 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-16 02:45:23,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-16 02:45:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:23,482 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 [2021-10-16 02:45:23,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-16 02:45:23,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,491 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-16 02:45:23,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:45:23,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-16 02:45:23,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:45:23,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:45:23,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:45:23,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:23,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:23,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-10-16 02:45:23,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:45:23,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:452, output treesize:232 [2021-10-16 02:45:23,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:23,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:23,887 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_34| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:45:23,891 INFO L168 Benchmark]: Toolchain (without parser) took 4616.06 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 65.4 MB in the beginning and 101.8 MB in the end (delta: -36.4 MB). Peak memory consumption was 54.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:23,891 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:45:23,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 403.20 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 73.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:23,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.83 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:45:23,893 INFO L168 Benchmark]: Boogie Preprocessor took 68.11 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:23,894 INFO L168 Benchmark]: RCFGBuilder took 795.48 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 52.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:23,894 INFO L168 Benchmark]: TraceAbstraction took 3273.39 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 52.4 MB in the beginning and 101.8 MB in the end (delta: -49.4 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:23,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 52.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 403.20 ms. Allocated memory is still 98.6 MB. Free memory was 65.3 MB in the beginning and 73.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.83 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.11 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 795.48 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 52.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3273.39 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 52.4 MB in the beginning and 101.8 MB in the end (delta: -49.4 MB). Peak memory consumption was 43.0 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_34| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_34|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:45:23,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:45:26,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:45:26,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:45:26,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:45:26,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:45:26,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:45:26,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:45:26,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:45:26,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:45:26,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:45:26,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:45:26,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:45:26,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:45:26,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:45:26,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:45:26,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:45:26,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:45:26,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:45:26,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:45:26,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:45:26,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:45:26,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:45:26,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:45:26,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:45:26,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:45:26,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:45:26,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:45:26,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:45:26,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:45:26,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:45:26,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:45:26,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:45:26,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:45:26,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:45:26,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:45:26,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:45:26,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:45:26,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:45:26,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:45:26,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:45:26,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:45:26,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:45:26,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:45:26,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:45:26,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:45:26,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:45:26,883 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:45:26,883 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:45:26,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:45:26,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:45:26,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:45:26,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:45:26,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:45:26,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:45:26,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:45:26,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:45:26,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:45:26,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:45:26,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:45:26,886 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:45:26,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:45:26,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:45:26,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:45:26,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:45:26,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:45:26,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:45:26,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:45:26,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:45:26,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:26,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:45:26,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:45:26,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:45:26,889 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:45:26,889 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:26,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:45:26,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:45:26,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:45:26,890 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 [2021-10-16 02:45:27,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:45:27,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:45:27,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:45:27,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:45:27,406 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:45:27,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-16 02:45:27,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/607097d27/cc007d4f0def4877864b3a083c3eba69/FLAG5b719083d [2021-10-16 02:45:28,179 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:45:28,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-16 02:45:28,190 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/607097d27/cc007d4f0def4877864b3a083c3eba69/FLAG5b719083d [2021-10-16 02:45:28,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/data/607097d27/cc007d4f0def4877864b3a083c3eba69 [2021-10-16 02:45:28,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:45:28,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:45:28,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:28,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:45:28,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:45:28,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38df0ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28, skipping insertion in model container [2021-10-16 02:45:28,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:45:28,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:45:28,733 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-16 02:45:28,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:28,810 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:45:28,831 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-16 02:45:28,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:28,878 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:45:28,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28 WrapperNode [2021-10-16 02:45:28,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:28,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:28,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:45:28,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:45:28,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:28,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:45:28,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:45:28,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:45:28,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:45:28,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:45:28,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:45:28,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:45:28,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:29,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:45:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:45:29,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:45:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:45:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:45:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:45:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:45:29,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:45:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:45:29,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:45:29,721 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-16 02:45:29,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:29 BoogieIcfgContainer [2021-10-16 02:45:29,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:45:29,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:45:29,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:45:29,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:45:29,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:45:28" (1/3) ... [2021-10-16 02:45:29,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fda540c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:29, skipping insertion in model container [2021-10-16 02:45:29,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (2/3) ... [2021-10-16 02:45:29,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fda540c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:29, skipping insertion in model container [2021-10-16 02:45:29,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:29" (3/3) ... [2021-10-16 02:45:29,736 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-10-16 02:45:29,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:45:29,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:45:29,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:45:29,825 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:45:29,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:45:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:45:29,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:29,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:29,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2021-10-16 02:45:29,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:29,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521581314] [2021-10-16 02:45:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:29,893 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:29,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:29,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:45:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:45:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:30,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521581314] [2021-10-16 02:45:30,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521581314] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:30,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:45:30,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816129899] [2021-10-16 02:45:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:45:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:45:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:30,236 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:30,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:30,266 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2021-10-16 02:45:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:45:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 15 [2021-10-16 02:45:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:30,278 INFO L225 Difference]: With dead ends: 67 [2021-10-16 02:45:30,278 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:45:30,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:45:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-16 02:45:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-16 02:45:30,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2021-10-16 02:45:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:30,321 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-16 02:45:30,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-16 02:45:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:45:30,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:30,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:30,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:45:30,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:30,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2021-10-16 02:45:30,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365179245] [2021-10-16 02:45:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:30,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:30,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:30,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:45:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:30,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365179245] [2021-10-16 02:45:30,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365179245] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:30,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:30,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:45:30,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670435707] [2021-10-16 02:45:30,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:30,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:30,884 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:31,393 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2021-10-16 02:45:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:31,395 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 15 [2021-10-16 02:45:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:31,398 INFO L225 Difference]: With dead ends: 81 [2021-10-16 02:45:31,398 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:45:31,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:45:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-10-16 02:45:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-10-16 02:45:31,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 15 [2021-10-16 02:45:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:31,422 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-10-16 02:45:31,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-10-16 02:45:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:45:31,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:31,423 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:31,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:31,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:31,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 300864557, now seen corresponding path program 1 times [2021-10-16 02:45:31,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:31,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153500891] [2021-10-16 02:45:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:31,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:31,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:31,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:45:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:45:31,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:45:32,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:32,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153500891] [2021-10-16 02:45:32,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153500891] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:32,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:32,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:45:32,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041078002] [2021-10-16 02:45:32,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:32,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:32,055 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:32,588 INFO L93 Difference]: Finished difference Result 99 states and 140 transitions. [2021-10-16 02:45:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:45:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:32,591 INFO L225 Difference]: With dead ends: 99 [2021-10-16 02:45:32,591 INFO L226 Difference]: Without dead ends: 70 [2021-10-16 02:45:32,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-16 02:45:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 51. [2021-10-16 02:45:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-10-16 02:45:32,619 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 21 [2021-10-16 02:45:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-10-16 02:45:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-10-16 02:45:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:45:32,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:32,624 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:32,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:32,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1242071021, now seen corresponding path program 1 times [2021-10-16 02:45:32,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:32,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559157398] [2021-10-16 02:45:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:32,842 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:32,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:32,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:32,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:45:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:32,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:45:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:45:33,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:33,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559157398] [2021-10-16 02:45:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559157398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:33,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:45:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583578227] [2021-10-16 02:45:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:33,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:33,243 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:33,763 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2021-10-16 02:45:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 33 [2021-10-16 02:45:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:33,766 INFO L225 Difference]: With dead ends: 134 [2021-10-16 02:45:33,766 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 02:45:33,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 02:45:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2021-10-16 02:45:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-10-16 02:45:33,800 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 33 [2021-10-16 02:45:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:33,800 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-10-16 02:45:33,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-10-16 02:45:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-16 02:45:33,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:33,816 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:33,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-16 02:45:34,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:34,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1721257363, now seen corresponding path program 1 times [2021-10-16 02:45:34,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:34,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521742636] [2021-10-16 02:45:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:34,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:34,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:34,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:45:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:45:34,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:45:34,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:34,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521742636] [2021-10-16 02:45:34,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521742636] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:34,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1220238234] [2021-10-16 02:45:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:34,662 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:34,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:34,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:45:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:34,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:45:35,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:45:35,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1220238234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:35,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047099512] [2021-10-16 02:45:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:35,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:35,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:35,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:45:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:35,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:45:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:45:35,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:45:36,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047099512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:36,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:36,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:45:36,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443242887] [2021-10-16 02:45:36,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:36,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:45:36,185 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:36,551 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-10-16 02:45:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 41 [2021-10-16 02:45:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:36,554 INFO L225 Difference]: With dead ends: 100 [2021-10-16 02:45:36,554 INFO L226 Difference]: Without dead ends: 76 [2021-10-16 02:45:36,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:45:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-16 02:45:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-10-16 02:45:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-10-16 02:45:36,571 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 41 [2021-10-16 02:45:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:36,572 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-10-16 02:45:36,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-10-16 02:45:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-16 02:45:36,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:36,575 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:36,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-16 02:45:36,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:37,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 02:45:37,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:37,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash -34624755, now seen corresponding path program 1 times [2021-10-16 02:45:37,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941075917] [2021-10-16 02:45:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:37,197 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:37,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:37,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:45:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-16 02:45:37,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-16 02:45:37,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:37,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941075917] [2021-10-16 02:45:37,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941075917] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:37,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047377715] [2021-10-16 02:45:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:37,971 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:37,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:37,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:45:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-16 02:45:38,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-16 02:45:38,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047377715] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:38,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829816543] [2021-10-16 02:45:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:38,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:38,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:45:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:45:39,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-16 02:45:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-16 02:45:39,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829816543] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:39,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:39,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:45:39,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30679557] [2021-10-16 02:45:39,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:39,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:45:39,709 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:40,119 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2021-10-16 02:45:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-16 02:45:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:40,121 INFO L225 Difference]: With dead ends: 118 [2021-10-16 02:45:40,121 INFO L226 Difference]: Without dead ends: 87 [2021-10-16 02:45:40,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:45:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-16 02:45:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-10-16 02:45:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-10-16 02:45:40,153 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 47 [2021-10-16 02:45:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:40,154 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-10-16 02:45:40,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-10-16 02:45:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-16 02:45:40,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:40,159 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:40,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-16 02:45:40,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-16 02:45:40,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:40,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:40,760 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2065474483, now seen corresponding path program 1 times [2021-10-16 02:45:40,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:40,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59378841] [2021-10-16 02:45:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:40,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:40,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:40,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:40,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:45:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:41,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-16 02:45:41,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-16 02:45:41,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59378841] [2021-10-16 02:45:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59378841] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853344763] [2021-10-16 02:45:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:41,566 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:41,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:41,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:41,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:45:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-16 02:45:42,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-16 02:45:42,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1853344763] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:42,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813417955] [2021-10-16 02:45:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:42,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:42,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:42,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:45:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:45:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-16 02:45:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-16 02:45:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813417955] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:43,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:43,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 13 [2021-10-16 02:45:43,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769199396] [2021-10-16 02:45:43,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:43,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:45:43,589 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:43,988 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2021-10-16 02:45:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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 59 [2021-10-16 02:45:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:43,990 INFO L225 Difference]: With dead ends: 130 [2021-10-16 02:45:43,990 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 02:45:43,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:45:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 02:45:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-10-16 02:45:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2727272727272727) internal successors, (112), 88 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-10-16 02:45:44,012 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 59 [2021-10-16 02:45:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:44,012 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-10-16 02:45:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-10-16 02:45:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-16 02:45:44,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:44,025 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, 1, 1, 1, 1] [2021-10-16 02:45:44,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:44,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-16 02:45:44,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-16 02:45:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:44,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash 716220365, now seen corresponding path program 1 times [2021-10-16 02:45:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:44,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915716978] [2021-10-16 02:45:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:44,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:44,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:44,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:45:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:45,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:45:45,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:45:45,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915716978] [2021-10-16 02:45:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915716978] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856629715] [2021-10-16 02:45:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:45,608 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:45,611 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:45,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:45:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:45:46,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:45:46,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [856629715] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:46,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653517725] [2021-10-16 02:45:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:46,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:46,643 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:46,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:45:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-16 02:45:47,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-16 02:45:47,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653517725] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:47,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:47,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:45:47,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006120281] [2021-10-16 02:45:47,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:47,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:45:47,918 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:48,465 INFO L93 Difference]: Finished difference Result 205 states and 260 transitions. [2021-10-16 02:45:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 67 [2021-10-16 02:45:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:48,475 INFO L225 Difference]: With dead ends: 205 [2021-10-16 02:45:48,475 INFO L226 Difference]: Without dead ends: 153 [2021-10-16 02:45:48,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:45:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-16 02:45:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 95. [2021-10-16 02:45:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2021-10-16 02:45:48,494 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 67 [2021-10-16 02:45:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2021-10-16 02:45:48,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2021-10-16 02:45:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-16 02:45:48,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:48,497 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:48,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:48,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:48,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:49,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:49,111 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1406176013, now seen corresponding path program 1 times [2021-10-16 02:45:49,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:49,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062871756] [2021-10-16 02:45:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:49,112 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:49,113 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:49,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:45:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:49,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-16 02:45:49,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-16 02:45:50,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:50,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062871756] [2021-10-16 02:45:50,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062871756] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:50,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [852043499] [2021-10-16 02:45:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:50,243 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:50,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:50,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:45:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-16 02:45:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-16 02:45:51,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [852043499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:51,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818929937] [2021-10-16 02:45:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:51,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:51,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:51,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:45:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-16 02:45:52,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-16 02:45:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818929937] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:52,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:45:52,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563909147] [2021-10-16 02:45:52,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:52,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:45:52,638 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:53,264 INFO L93 Difference]: Finished difference Result 183 states and 233 transitions. [2021-10-16 02:45:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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 73 [2021-10-16 02:45:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:53,269 INFO L225 Difference]: With dead ends: 183 [2021-10-16 02:45:53,270 INFO L226 Difference]: Without dead ends: 124 [2021-10-16 02:45:53,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:45:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-16 02:45:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2021-10-16 02:45:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2745098039215685) internal successors, (130), 102 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2021-10-16 02:45:53,286 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 73 [2021-10-16 02:45:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:53,286 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2021-10-16 02:45:53,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2021-10-16 02:45:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-16 02:45:53,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:53,288 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:53,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:53,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:53,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-16 02:45:53,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:53,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1509250675, now seen corresponding path program 1 times [2021-10-16 02:45:53,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:53,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005077290] [2021-10-16 02:45:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:53,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:53,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:53,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:45:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-16 02:45:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-16 02:45:55,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:55,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005077290] [2021-10-16 02:45:55,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005077290] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:55,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1221136223] [2021-10-16 02:45:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:55,252 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:55,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:45:55,253 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:45:55,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:45:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:56,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-16 02:45:56,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-16 02:45:56,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1221136223] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:56,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945691061] [2021-10-16 02:45:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:56,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:56,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:56,459 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:56,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:45:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-10-16 02:45:57,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-10-16 02:45:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945691061] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:57,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:45:57,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:45:57,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822008120] [2021-10-16 02:45:57,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:45:57,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:45:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:45:57,878 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:58,287 INFO L93 Difference]: Finished difference Result 188 states and 242 transitions. [2021-10-16 02:45:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 85 [2021-10-16 02:45:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:58,290 INFO L225 Difference]: With dead ends: 188 [2021-10-16 02:45:58,290 INFO L226 Difference]: Without dead ends: 120 [2021-10-16 02:45:58,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:45:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-16 02:45:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2021-10-16 02:45:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2021-10-16 02:45:58,314 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 85 [2021-10-16 02:45:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:58,314 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2021-10-16 02:45:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:45:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2021-10-16 02:45:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-16 02:45:58,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:58,316 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:58,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:58,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:58,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:58,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:58,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:45:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 527992973, now seen corresponding path program 1 times [2021-10-16 02:45:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:58,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504741299] [2021-10-16 02:45:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:58,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:58,939 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:58,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 02:45:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:45:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-16 02:46:00,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-16 02:46:00,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:00,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504741299] [2021-10-16 02:46:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504741299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:00,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1083724878] [2021-10-16 02:46:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:00,357 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:00,358 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:00,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 02:46:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:01,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-16 02:46:01,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-16 02:46:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1083724878] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83807230] [2021-10-16 02:46:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:01,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:01,878 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:01,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 02:46:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-10-16 02:46:03,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-10-16 02:46:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83807230] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:03,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:46:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 16 [2021-10-16 02:46:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210699204] [2021-10-16 02:46:03,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:46:03,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:46:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:46:03,894 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:09,704 INFO L93 Difference]: Finished difference Result 949 states and 1285 transitions. [2021-10-16 02:46:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-16 02:46:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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 93 [2021-10-16 02:46:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:09,710 INFO L225 Difference]: With dead ends: 949 [2021-10-16 02:46:09,711 INFO L226 Difference]: Without dead ends: 847 [2021-10-16 02:46:09,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1844.6ms TimeCoverageRelationStatistics Valid=948, Invalid=2358, Unknown=0, NotChecked=0, Total=3306 [2021-10-16 02:46:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-16 02:46:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 235. [2021-10-16 02:46:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.205128205128205) internal successors, (282), 234 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2021-10-16 02:46:09,750 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 93 [2021-10-16 02:46:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:09,750 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2021-10-16 02:46:09,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2021-10-16 02:46:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-16 02:46:09,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:09,754 INFO L512 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 8, 8, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:09,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:09,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-16 02:46:10,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:10,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:10,371 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:10,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2138298317, now seen corresponding path program 2 times [2021-10-16 02:46:10,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:10,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780132457] [2021-10-16 02:46:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:10,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:10,374 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:10,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:46:11,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:11,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-16 02:46:12,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-16 02:46:13,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:13,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780132457] [2021-10-16 02:46:13,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780132457] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:13,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1606312856] [2021-10-16 02:46:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:13,176 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:13,177 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:13,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:46:14,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-16 02:46:15,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-16 02:46:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1606312856] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:15,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161017286] [2021-10-16 02:46:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:46:15,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:15,930 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 02:46:17,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:46:17,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:17,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:46:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2021-10-16 02:46:19,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2021-10-16 02:46:20,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161017286] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:20,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:46:20,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 6, 6] total 26 [2021-10-16 02:46:20,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988164591] [2021-10-16 02:46:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:46:20,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:46:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:46:20,268 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:30,454 INFO L93 Difference]: Finished difference Result 1002 states and 1372 transitions. [2021-10-16 02:46:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-16 02:46:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 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 193 [2021-10-16 02:46:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:30,460 INFO L225 Difference]: With dead ends: 1002 [2021-10-16 02:46:30,460 INFO L226 Difference]: Without dead ends: 780 [2021-10-16 02:46:30,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1128 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 5845.7ms TimeCoverageRelationStatistics Valid=2024, Invalid=6906, Unknown=0, NotChecked=0, Total=8930 [2021-10-16 02:46:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-10-16 02:46:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 511. [2021-10-16 02:46:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.1490196078431372) internal successors, (586), 510 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 586 transitions. [2021-10-16 02:46:30,521 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 586 transitions. Word has length 193 [2021-10-16 02:46:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 586 transitions. [2021-10-16 02:46:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 586 transitions. [2021-10-16 02:46:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-10-16 02:46:30,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:30,530 INFO L512 BasicCegarLoop]: trace histogram [168, 84, 28, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:30,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:30,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:30,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:31,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:31,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -214211763, now seen corresponding path program 3 times [2021-10-16 02:46:31,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:31,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998884592] [2021-10-16 02:46:31,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:46:31,140 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:31,141 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:46:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:46:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:46:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:46:34,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21701 backedges. 39 proven. 732 refuted. 0 times theorem prover too weak. 20930 trivial. 0 not checked. [2021-10-16 02:46:37,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21701 backedges. 39 proven. 732 refuted. 0 times theorem prover too weak. 20930 trivial. 0 not checked. [2021-10-16 02:46:42,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998884592] [2021-10-16 02:46:42,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998884592] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:42,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004961086] [2021-10-16 02:46:42,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:46:42,686 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:42,687 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:42,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 02:47:48,275 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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() [2021-10-16 02:47:48,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 134 [2021-10-16 02:47:48,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-16 02:47:48,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:47:48,478 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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 [2021-10-16 02:47:48,482 INFO L168 Benchmark]: Toolchain (without parser) took 139965.31 ms. Allocated memory was 88.1 MB in the beginning and 148.9 MB in the end (delta: 60.8 MB). Free memory was 69.0 MB in the beginning and 63.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 65.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:48,482 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:47:48,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.48 ms. Allocated memory is still 88.1 MB. Free memory was 68.8 MB in the beginning and 70.6 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:48,483 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.78 ms. Allocated memory is still 88.1 MB. Free memory was 70.6 MB in the beginning and 68.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:48,483 INFO L168 Benchmark]: Boogie Preprocessor took 37.85 ms. Allocated memory is still 88.1 MB. Free memory was 68.7 MB in the beginning and 67.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:47:48,483 INFO L168 Benchmark]: RCFGBuilder took 755.89 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 54.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:48,484 INFO L168 Benchmark]: TraceAbstraction took 138754.66 ms. Allocated memory was 88.1 MB in the beginning and 148.9 MB in the end (delta: 60.8 MB). Free memory was 53.5 MB in the beginning and 63.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:48,486 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.48 ms. Allocated memory is still 88.1 MB. Free memory was 68.8 MB in the beginning and 70.6 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.78 ms. Allocated memory is still 88.1 MB. Free memory was 70.6 MB in the beginning and 68.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.85 ms. Allocated memory is still 88.1 MB. Free memory was 68.7 MB in the beginning and 67.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 755.89 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 54.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 138754.66 ms. Allocated memory was 88.1 MB in the beginning and 148.9 MB in the end (delta: 60.8 MB). Free memory was 53.5 MB in the beginning and 63.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 51.8 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31) 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. [2021-10-16 02:47:48,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1f237d9-cb70-4e1d-ad5f-1edfd1c68702/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...