./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4401a00aa30b45c5181fc2937516d443b08f839a .............................................................................................................................................................. Execution finished with exit code -9 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_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4401a00aa30b45c5181fc2937516d443b08f839a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished with exit code -9 Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:15:30,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:15:30,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:15:30,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:15:30,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:15:30,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:15:30,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:15:30,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:15:30,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:15:30,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:15:30,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:15:30,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:15:30,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:15:30,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:15:30,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:15:30,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:15:30,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:15:30,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:15:30,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:15:30,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:15:30,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:15:30,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:15:30,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:15:30,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:15:30,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:15:30,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:15:30,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:15:30,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:15:30,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:15:30,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:15:30,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:15:30,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:15:30,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:15:30,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:15:30,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:15:30,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:15:30,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:15:30,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:15:30,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:15:30,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:15:30,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:15:30,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:15:30,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:15:30,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:15:30,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:15:30,607 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:15:30,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:15:30,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:15:30,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:15:30,608 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:15:30,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:15:30,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:15:30,609 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:15:30,609 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:15:30,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:15:30,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:15:30,610 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:15:30,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:15:30,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:15:30,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:15:30,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:15:30,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:15:30,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:15:30,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:15:30,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:15:30,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:15:30,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:15:30,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:15:30,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:15:30,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:15:30,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:15:30,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:15:30,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:30,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:15:30,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:15:30,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:15:30,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:15:30,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:15:30,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:15:30,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:15:30,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:15:30,618 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_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4401a00aa30b45c5181fc2937516d443b08f839a [2021-10-13 07:15:30,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:15:30,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:15:30,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:15:30,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:15:30,945 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:15:30,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-10-13 07:15:31,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/ae2268a2b/a815cd51833d448b99c94ce97f3d8ca4/FLAG9bd2839d3 [2021-10-13 07:15:32,158 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:15:32,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-10-13 07:15:32,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/ae2268a2b/a815cd51833d448b99c94ce97f3d8ca4/FLAG9bd2839d3 [2021-10-13 07:15:32,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/ae2268a2b/a815cd51833d448b99c94ce97f3d8ca4 [2021-10-13 07:15:32,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:15:32,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:15:32,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:32,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:15:32,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:15:32,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:32" (1/1) ... [2021-10-13 07:15:32,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e159667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:32, skipping insertion in model container [2021-10-13 07:15:32,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:32" (1/1) ... [2021-10-13 07:15:32,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:15:32,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:15:33,390 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-10-13 07:15:33,519 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-10-13 07:15:34,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:34,929 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:15:35,021 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-10-13 07:15:35,041 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-10-13 07:15:35,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:35,786 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:15:35,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35 WrapperNode [2021-10-13 07:15:35,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:35,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:35,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:15:35,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:15:35,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:35,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:36,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:15:36,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:15:36,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:15:36,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:36,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:37,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:15:37,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:15:37,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:15:37,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:15:37,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:35" (1/1) ... [2021-10-13 07:15:37,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:37,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:15:37,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:15:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:15:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:15:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:15:37,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:23:32,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:23:32,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:23:32,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:23:32,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:23:32,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:23:32,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:23:32,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:23:32,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:23:32,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:23:32,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:23:32,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:23:32,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:23:32,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:23:32,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:23:32,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:23:32,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:23:32,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:23:32,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:23:32,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:23:32,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:23:32,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:23:32,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:23:32,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:23:32,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:23:32,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:23:32,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:23:32,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:23:32,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:23:32,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:23:32,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:23:32,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:23:32,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:23:32,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:23:32,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:23:32,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:23:32,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:23:32,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:23:32,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:23:32,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:23:32,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:23:32,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:23:32,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:23:32,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:23:32,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:23:32,444 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:23:32,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:23:32,445 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:23:32,445 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:23:32,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:23:32,446 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:23:32,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:23:32,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:23:32,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:23:32,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:23:32,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:23:32,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:23:32,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:23:32,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:23:32,449 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:23:32,449 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:23:32,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:23:32,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:23:32,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:23:32,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:23:32,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:23:32,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:23:32,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:23:32,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:32,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:23:32,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:23:32,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:23:32,452 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:23:32,452 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:23:32,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:23:32,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:23:32,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:23:32,453 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_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4401a00aa30b45c5181fc2937516d443b08f839a [2021-10-13 07:23:32,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:23:32,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:23:32,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:23:32,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:23:32,870 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:23:32,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-10-13 07:23:32,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/e7e00ce19/f1e03f8582e440178f68c8c315f9db71/FLAGf6696dbf6 [2021-10-13 07:23:34,001 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:23:34,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-10-13 07:23:34,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/e7e00ce19/f1e03f8582e440178f68c8c315f9db71/FLAGf6696dbf6 [2021-10-13 07:23:34,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/data/e7e00ce19/f1e03f8582e440178f68c8c315f9db71 [2021-10-13 07:23:34,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:23:34,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:23:34,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:34,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:23:34,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:23:34,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:34" (1/1) ... [2021-10-13 07:23:34,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f32ac59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:34, skipping insertion in model container [2021-10-13 07:23:34,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:23:34" (1/1) ... [2021-10-13 07:23:34,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:23:34,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:23:35,093 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-10-13 07:23:35,186 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-10-13 07:23:36,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:36,255 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:23:36,331 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-10-13 07:23:36,346 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_fae811ad-f50d-42bb-91d2-2126d643000e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-10-13 07:23:37,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:23:37,056 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:23:37,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37 WrapperNode [2021-10-13 07:23:37,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:23:37,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:37,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:23:37,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:23:37,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:23:37,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:23:37,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:23:37,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:23:37,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:23:37,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:23:37,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:23:37,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:23:37,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (1/1) ... [2021-10-13 07:23:37,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:23:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:37,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:23:37,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:23:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:23:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:23:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:23:37,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:24:06,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:24:06,500 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-10-13 07:24:06,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:06 BoogieIcfgContainer [2021-10-13 07:24:06,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:24:06,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:24:06,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:24:06,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:24:06,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:23:34" (1/3) ... [2021-10-13 07:24:06,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598fe280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:06, skipping insertion in model container [2021-10-13 07:24:06,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:23:37" (2/3) ... [2021-10-13 07:24:06,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598fe280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:24:06, skipping insertion in model container [2021-10-13 07:24:06,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:24:06" (3/3) ... [2021-10-13 07:24:06,522 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-10-13 07:24:06,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:24:06,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 07:24:06,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:24:06,613 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:24:06,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 07:24:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 07:24:06,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:06,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:06,688 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:24:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-10-13 07:24:06,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:06,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778136910] [2021-10-13 07:24:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:06,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:06,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:24:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:24:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:07,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:07,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778136910] [2021-10-13 07:24:07,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778136910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:07,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:07,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:24:07,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856553008] [2021-10-13 07:24:07,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:24:07,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:24:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:24:07,301 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 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 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:07,396 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2021-10-13 07:24:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:24:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-13 07:24:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:07,422 INFO L225 Difference]: With dead ends: 1806 [2021-10-13 07:24:07,423 INFO L226 Difference]: Without dead ends: 860 [2021-10-13 07:24:07,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:24:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-10-13 07:24:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-10-13 07:24:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8881118881118881) internal successors, (1620), 859 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2021-10-13 07:24:07,556 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2021-10-13 07:24:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:07,557 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2021-10-13 07:24:07,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2021-10-13 07:24:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 07:24:07,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:07,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:07,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:07,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:07,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:24:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-10-13 07:24:07,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:07,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470194627] [2021-10-13 07:24:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:07,764 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:07,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:07,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:07,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:24:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:24:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:08,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:08,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:08,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470194627] [2021-10-13 07:24:08,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470194627] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:08,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:08,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:24:08,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630269199] [2021-10-13 07:24:08,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:24:08,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:24:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:24:08,442 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:08,594 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2021-10-13 07:24:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:24:08,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-10-13 07:24:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:08,601 INFO L225 Difference]: With dead ends: 924 [2021-10-13 07:24:08,602 INFO L226 Difference]: Without dead ends: 860 [2021-10-13 07:24:08,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:24:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-10-13 07:24:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-10-13 07:24:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8414918414918415) internal successors, (1580), 859 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2021-10-13 07:24:08,632 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2021-10-13 07:24:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:08,633 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2021-10-13 07:24:08,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:24:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2021-10-13 07:24:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 07:24:08,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:24:08,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:24:08,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:08,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:08,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:24:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:24:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash 642093148, now seen corresponding path program 1 times [2021-10-13 07:24:08,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:24:08,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036741950] [2021-10-13 07:24:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:24:08,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:24:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:24:08,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:24:08,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:24:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:24:09,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:24:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:24:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:09,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:24:09,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:24:09,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036741950] [2021-10-13 07:24:09,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036741950] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:24:09,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:09,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:24:09,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913787458] [2021-10-13 07:24:09,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:24:09,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:24:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:24:09,735 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:06,349 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2021-10-13 07:25:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:25:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 61 [2021-10-13 07:25:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:06,369 INFO L225 Difference]: With dead ends: 3115 [2021-10-13 07:25:06,369 INFO L226 Difference]: Without dead ends: 2362 [2021-10-13 07:25:06,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:25:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-10-13 07:25:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2021-10-13 07:25:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2360 states have (on average 1.4991525423728813) internal successors, (3538), 2361 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3538 transitions. [2021-10-13 07:25:06,454 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3538 transitions. Word has length 61 [2021-10-13 07:25:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:06,455 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3538 transitions. [2021-10-13 07:25:06,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3538 transitions. [2021-10-13 07:25:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:25:06,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:06,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:06,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:06,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:06,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-10-13 07:25:06,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:06,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280196317] [2021-10-13 07:25:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:06,682 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:06,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:06,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:25:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:07,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:07,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:07,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280196317] [2021-10-13 07:25:07,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280196317] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:07,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:07,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:07,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728769069] [2021-10-13 07:25:07,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:07,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:07,627 INFO L87 Difference]: Start difference. First operand 2362 states and 3538 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:07,676 INFO L93 Difference]: Finished difference Result 2476 states and 3718 transitions. [2021-10-13 07:25:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-10-13 07:25:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:07,695 INFO L225 Difference]: With dead ends: 2476 [2021-10-13 07:25:07,695 INFO L226 Difference]: Without dead ends: 2416 [2021-10-13 07:25:07,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-10-13 07:25:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2021-10-13 07:25:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2412 states have (on average 1.5012437810945274) internal successors, (3621), 2413 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3621 transitions. [2021-10-13 07:25:07,769 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3621 transitions. Word has length 77 [2021-10-13 07:25:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:07,769 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3621 transitions. [2021-10-13 07:25:07,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3621 transitions. [2021-10-13 07:25:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:25:07,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:07,772 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:07,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:07,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:07,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-10-13 07:25:07,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:07,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629409442] [2021-10-13 07:25:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:07,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:07,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:07,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:25:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:08,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:08,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629409442] [2021-10-13 07:25:08,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629409442] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:08,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:08,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:08,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789851345] [2021-10-13 07:25:08,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:08,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:08,912 INFO L87 Difference]: Start difference. First operand 2414 states and 3621 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:08,957 INFO L93 Difference]: Finished difference Result 2626 states and 3957 transitions. [2021-10-13 07:25:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-10-13 07:25:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:08,975 INFO L225 Difference]: With dead ends: 2626 [2021-10-13 07:25:08,976 INFO L226 Difference]: Without dead ends: 2514 [2021-10-13 07:25:08,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-10-13 07:25:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2021-10-13 07:25:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2510 states have (on average 1.5043824701195219) internal successors, (3776), 2511 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3776 transitions. [2021-10-13 07:25:09,057 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3776 transitions. Word has length 77 [2021-10-13 07:25:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:09,057 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 3776 transitions. [2021-10-13 07:25:09,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3776 transitions. [2021-10-13 07:25:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:25:09,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:09,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:09,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:09,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:09,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-10-13 07:25:09,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:09,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17736749] [2021-10-13 07:25:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:09,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:09,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:09,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:25:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:25:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:12,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:20,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17736749] [2021-10-13 07:25:20,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17736749] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:20,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:20,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-13 07:25:20,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95364041] [2021-10-13 07:25:20,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:25:20,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:25:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:25:20,429 INFO L87 Difference]: Start difference. First operand 2512 states and 3776 transitions. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:46,043 INFO L93 Difference]: Finished difference Result 8798 states and 13651 transitions. [2021-10-13 07:25:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 07:25:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 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 77 [2021-10-13 07:25:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:46,095 INFO L225 Difference]: With dead ends: 8798 [2021-10-13 07:25:46,095 INFO L226 Difference]: Without dead ends: 8588 [2021-10-13 07:25:46,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 12556.9ms TimeCoverageRelationStatistics Valid=613, Invalid=1193, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 07:25:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8588 states. [2021-10-13 07:25:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8588 to 4128. [2021-10-13 07:25:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4126 states have (on average 1.528841492971401) internal successors, (6308), 4127 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6308 transitions. [2021-10-13 07:25:46,400 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6308 transitions. Word has length 77 [2021-10-13 07:25:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:46,402 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6308 transitions. [2021-10-13 07:25:46,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6308 transitions. [2021-10-13 07:25:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 07:25:46,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:46,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:46,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:46,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:46,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-10-13 07:25:46,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:46,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10939724] [2021-10-13 07:25:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:46,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:46,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:46,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:46,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:25:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:47,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:47,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:47,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10939724] [2021-10-13 07:25:47,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10939724] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:47,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:47,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:25:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696478743] [2021-10-13 07:25:47,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:25:47,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:25:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:25:47,970 INFO L87 Difference]: Start difference. First operand 4128 states and 6308 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:48,239 INFO L93 Difference]: Finished difference Result 8612 states and 13324 transitions. [2021-10-13 07:25:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:25:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 79 [2021-10-13 07:25:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:48,272 INFO L225 Difference]: With dead ends: 8612 [2021-10-13 07:25:48,272 INFO L226 Difference]: Without dead ends: 6786 [2021-10-13 07:25:48,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:25:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6786 states. [2021-10-13 07:25:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6786 to 6782. [2021-10-13 07:25:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6782 states, 6780 states have (on average 1.5325958702064897) internal successors, (10391), 6781 states have internal predecessors, (10391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6782 states to 6782 states and 10391 transitions. [2021-10-13 07:25:48,628 INFO L78 Accepts]: Start accepts. Automaton has 6782 states and 10391 transitions. Word has length 79 [2021-10-13 07:25:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 6782 states and 10391 transitions. [2021-10-13 07:25:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6782 states and 10391 transitions. [2021-10-13 07:25:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 07:25:48,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:48,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:48,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:48,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-10-13 07:25:48,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:48,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156854266] [2021-10-13 07:25:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:48,833 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:48,834 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:48,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:25:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:49,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:25:49,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:49,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:49,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:49,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156854266] [2021-10-13 07:25:49,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156854266] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:49,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:49,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:25:49,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911287360] [2021-10-13 07:25:49,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:25:49,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:25:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:25:49,704 INFO L87 Difference]: Start difference. First operand 6782 states and 10391 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:50,604 INFO L93 Difference]: Finished difference Result 10305 states and 15681 transitions. [2021-10-13 07:25:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:25:50,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-13 07:25:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:50,631 INFO L225 Difference]: With dead ends: 10305 [2021-10-13 07:25:50,631 INFO L226 Difference]: Without dead ends: 10303 [2021-10-13 07:25:50,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:25:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-10-13 07:25:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 6926. [2021-10-13 07:25:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6926 states, 6924 states have (on average 1.5206528018486425) internal successors, (10529), 6925 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 10529 transitions. [2021-10-13 07:25:51,151 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 10529 transitions. Word has length 80 [2021-10-13 07:25:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:51,152 INFO L470 AbstractCegarLoop]: Abstraction has 6926 states and 10529 transitions. [2021-10-13 07:25:51,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 10529 transitions. [2021-10-13 07:25:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 07:25:51,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:51,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:51,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:51,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1671607760, now seen corresponding path program 1 times [2021-10-13 07:25:51,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:51,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466451125] [2021-10-13 07:25:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:51,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:51,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:51,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:51,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:25:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:52,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:52,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:52,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466451125] [2021-10-13 07:25:52,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466451125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:52,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:52,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:52,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791965748] [2021-10-13 07:25:52,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:52,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:52,462 INFO L87 Difference]: Start difference. First operand 6926 states and 10529 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:25:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:52,944 INFO L93 Difference]: Finished difference Result 15630 states and 23797 transitions. [2021-10-13 07:25:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-10-13 07:25:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:52,966 INFO L225 Difference]: With dead ends: 15630 [2021-10-13 07:25:52,966 INFO L226 Difference]: Without dead ends: 11008 [2021-10-13 07:25:52,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-10-13 07:25:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 11006. [2021-10-13 07:25:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11006 states, 11004 states have (on average 1.5105416212286442) internal successors, (16622), 11005 states have internal predecessors, (16622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11006 states to 11006 states and 16622 transitions. [2021-10-13 07:25:53,679 INFO L78 Accepts]: Start accepts. Automaton has 11006 states and 16622 transitions. Word has length 81 [2021-10-13 07:25:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:53,680 INFO L470 AbstractCegarLoop]: Abstraction has 11006 states and 16622 transitions. [2021-10-13 07:25:53,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:25:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 11006 states and 16622 transitions. [2021-10-13 07:25:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 07:25:53,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:53,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:53,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:53,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:53,900 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1602473360, now seen corresponding path program 1 times [2021-10-13 07:25:53,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:53,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501408739] [2021-10-13 07:25:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:53,901 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:53,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:53,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:25:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:55,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:55,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501408739] [2021-10-13 07:25:55,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501408739] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:55,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:55,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:55,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33581745] [2021-10-13 07:25:55,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:55,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:55,057 INFO L87 Difference]: Start difference. First operand 11006 states and 16622 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:25:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:25:56,127 INFO L93 Difference]: Finished difference Result 27330 states and 41176 transitions. [2021-10-13 07:25:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:25:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-10-13 07:25:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:25:56,169 INFO L225 Difference]: With dead ends: 27330 [2021-10-13 07:25:56,170 INFO L226 Difference]: Without dead ends: 18628 [2021-10-13 07:25:56,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18628 states. [2021-10-13 07:25:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18628 to 18626. [2021-10-13 07:25:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18626 states, 18624 states have (on average 1.493664089347079) internal successors, (27818), 18625 states have internal predecessors, (27818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:25:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18626 states to 18626 states and 27818 transitions. [2021-10-13 07:25:57,746 INFO L78 Accepts]: Start accepts. Automaton has 18626 states and 27818 transitions. Word has length 81 [2021-10-13 07:25:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:25:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 18626 states and 27818 transitions. [2021-10-13 07:25:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:25:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18626 states and 27818 transitions. [2021-10-13 07:25:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 07:25:57,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:25:57,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:25:57,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:25:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:25:57,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:25:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:25:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1526309104, now seen corresponding path program 1 times [2021-10-13 07:25:57,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:25:57,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611739607] [2021-10-13 07:25:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:25:57,966 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:25:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:25:57,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:25:57,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:25:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:25:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:25:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:25:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:58,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:25:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:25:59,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:25:59,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611739607] [2021-10-13 07:25:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611739607] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:25:59,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:25:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:25:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295713696] [2021-10-13 07:25:59,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:25:59,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:25:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:25:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:25:59,247 INFO L87 Difference]: Start difference. First operand 18626 states and 27818 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:26:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:01,352 INFO L93 Difference]: Finished difference Result 49110 states and 72964 transitions. [2021-10-13 07:26:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-10-13 07:26:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:01,414 INFO L225 Difference]: With dead ends: 49110 [2021-10-13 07:26:01,414 INFO L226 Difference]: Without dead ends: 32788 [2021-10-13 07:26:01,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32788 states. [2021-10-13 07:26:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32788 to 32786. [2021-10-13 07:26:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32786 states, 32784 states have (on average 1.4711444607125428) internal successors, (48230), 32785 states have internal predecessors, (48230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32786 states to 32786 states and 48230 transitions. [2021-10-13 07:26:04,160 INFO L78 Accepts]: Start accepts. Automaton has 32786 states and 48230 transitions. Word has length 81 [2021-10-13 07:26:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:04,161 INFO L470 AbstractCegarLoop]: Abstraction has 32786 states and 48230 transitions. [2021-10-13 07:26:04,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:26:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32786 states and 48230 transitions. [2021-10-13 07:26:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 07:26:04,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:04,162 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:04,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 07:26:04,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:04,378 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash -915850320, now seen corresponding path program 1 times [2021-10-13 07:26:04,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:04,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793343446] [2021-10-13 07:26:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:04,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:04,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:04,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:04,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:26:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:26:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:05,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:05,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:05,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793343446] [2021-10-13 07:26:05,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793343446] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:05,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:05,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:26:05,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629829817] [2021-10-13 07:26:05,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:26:05,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:26:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:05,630 INFO L87 Difference]: Start difference. First operand 32786 states and 48230 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:26:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:09,841 INFO L93 Difference]: Finished difference Result 89430 states and 130600 transitions. [2021-10-13 07:26:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-10-13 07:26:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:09,923 INFO L225 Difference]: With dead ends: 89430 [2021-10-13 07:26:09,923 INFO L226 Difference]: Without dead ends: 58948 [2021-10-13 07:26:09,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58948 states. [2021-10-13 07:26:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58948 to 58946. [2021-10-13 07:26:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58946 states, 58944 states have (on average 1.4436414223669924) internal successors, (85094), 58945 states have internal predecessors, (85094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58946 states to 58946 states and 85094 transitions. [2021-10-13 07:26:15,185 INFO L78 Accepts]: Start accepts. Automaton has 58946 states and 85094 transitions. Word has length 81 [2021-10-13 07:26:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:15,186 INFO L470 AbstractCegarLoop]: Abstraction has 58946 states and 85094 transitions. [2021-10-13 07:26:15,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-10-13 07:26:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 58946 states and 85094 transitions. [2021-10-13 07:26:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-13 07:26:15,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:15,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:15,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:15,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:15,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -265963089, now seen corresponding path program 1 times [2021-10-13 07:26:15,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:15,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926163724] [2021-10-13 07:26:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:15,551 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:15,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:15,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:26:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:26:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:18,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:20,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:20,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926163724] [2021-10-13 07:26:20,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926163724] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:20,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [41552985] [2021-10-13 07:26:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:20,058 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:20,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:20,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:20,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:26:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:36,200 WARN L207 SmtUtils]: Spent 10.49 s on a formula simplification that was a NOOP. DAG size: 1 [2021-10-13 07:26:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:36,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [41552985] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:36,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:26:36,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 18 [2021-10-13 07:26:36,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718286869] [2021-10-13 07:26:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:36,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:36,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:26:36,706 INFO L87 Difference]: Start difference. First operand 58946 states and 85094 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:41,060 INFO L93 Difference]: Finished difference Result 115590 states and 166744 transitions. [2021-10-13 07:26:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 114 [2021-10-13 07:26:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:41,118 INFO L225 Difference]: With dead ends: 115590 [2021-10-13 07:26:41,118 INFO L226 Difference]: Without dead ends: 58948 [2021-10-13 07:26:41,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 612.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:26:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58948 states. [2021-10-13 07:26:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58948 to 58946. [2021-10-13 07:26:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58946 states, 58944 states have (on average 1.4314264386536373) internal successors, (84374), 58945 states have internal predecessors, (84374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58946 states to 58946 states and 84374 transitions. [2021-10-13 07:26:45,667 INFO L78 Accepts]: Start accepts. Automaton has 58946 states and 84374 transitions. Word has length 114 [2021-10-13 07:26:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:45,667 INFO L470 AbstractCegarLoop]: Abstraction has 58946 states and 84374 transitions. [2021-10-13 07:26:45,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 58946 states and 84374 transitions. [2021-10-13 07:26:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-13 07:26:45,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:45,677 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:45,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:45,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-13 07:26:46,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:46,078 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash 475469113, now seen corresponding path program 1 times [2021-10-13 07:26:46,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:46,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966814455] [2021-10-13 07:26:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:46,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:46,081 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:46,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:26:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:26:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:49,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:50,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966814455] [2021-10-13 07:26:50,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966814455] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:50,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922520624] [2021-10-13 07:26:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:50,758 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:50,759 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:50,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 07:26:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:52,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:52,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922520624] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:52,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:26:52,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 18 [2021-10-13 07:26:52,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310105948] [2021-10-13 07:26:52,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:52,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:26:52,663 INFO L87 Difference]: Start difference. First operand 58946 states and 84374 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:54,980 INFO L93 Difference]: Finished difference Result 87270 states and 124840 transitions. [2021-10-13 07:26:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 114 [2021-10-13 07:26:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:55,012 INFO L225 Difference]: With dead ends: 87270 [2021-10-13 07:26:55,012 INFO L226 Difference]: Without dead ends: 30628 [2021-10-13 07:26:55,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 603.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:26:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30628 states. [2021-10-13 07:26:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30628 to 30626. [2021-10-13 07:26:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30626 states, 30624 states have (on average 1.4220872518286312) internal successors, (43550), 30625 states have internal predecessors, (43550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 43550 transitions. [2021-10-13 07:26:57,601 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 43550 transitions. Word has length 114 [2021-10-13 07:26:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 30626 states and 43550 transitions. [2021-10-13 07:26:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 43550 transitions. [2021-10-13 07:26:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-13 07:26:57,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:57,606 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:57,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 07:26:57,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 07:26:58,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:58,015 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:26:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash -121400029, now seen corresponding path program 1 times [2021-10-13 07:26:58,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:58,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944753413] [2021-10-13 07:26:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:58,016 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:58,017 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:58,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:26:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:26:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:00,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:02,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:02,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944753413] [2021-10-13 07:27:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944753413] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:02,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376724447] [2021-10-13 07:27:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:02,598 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:02,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:02,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:27:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:27:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:04,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:04,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [376724447] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:27:04,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:27:04,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 18 [2021-10-13 07:27:04,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008020959] [2021-10-13 07:27:04,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:27:04,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:27:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:27:04,654 INFO L87 Difference]: Start difference. First operand 30626 states and 43550 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:05,779 INFO L93 Difference]: Finished difference Result 44790 states and 63604 transitions. [2021-10-13 07:27:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:27:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-10-13 07:27:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:05,795 INFO L225 Difference]: With dead ends: 44790 [2021-10-13 07:27:05,795 INFO L226 Difference]: Without dead ends: 16468 [2021-10-13 07:27:05,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:27:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16468 states. [2021-10-13 07:27:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16468 to 16466. [2021-10-13 07:27:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16466 states, 16464 states have (on average 1.4163022351797863) internal successors, (23318), 16465 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16466 states to 16466 states and 23318 transitions. [2021-10-13 07:27:06,954 INFO L78 Accepts]: Start accepts. Automaton has 16466 states and 23318 transitions. Word has length 114 [2021-10-13 07:27:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:06,954 INFO L470 AbstractCegarLoop]: Abstraction has 16466 states and 23318 transitions. [2021-10-13 07:27:06,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 16466 states and 23318 transitions. [2021-10-13 07:27:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-13 07:27:06,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:06,957 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:06,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:07,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:07,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:27:07,363 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:07,364 INFO L82 PathProgramCache]: Analyzing trace with hash -71380353, now seen corresponding path program 1 times [2021-10-13 07:27:07,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:07,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323189307] [2021-10-13 07:27:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:07,364 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:07,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:07,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:07,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:27:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:12,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:12,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323189307] [2021-10-13 07:27:12,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323189307] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1323996091] [2021-10-13 07:27:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:12,485 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:12,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:12,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:27:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:27:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:14,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:14,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1323996091] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:27:14,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:27:14,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 18 [2021-10-13 07:27:14,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659884426] [2021-10-13 07:27:14,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:27:14,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:27:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:27:14,708 INFO L87 Difference]: Start difference. First operand 16466 states and 23318 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:15,246 INFO L93 Difference]: Finished difference Result 23550 states and 33256 transitions. [2021-10-13 07:27:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:27:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 114 [2021-10-13 07:27:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:15,256 INFO L225 Difference]: With dead ends: 23550 [2021-10-13 07:27:15,256 INFO L226 Difference]: Without dead ends: 9388 [2021-10-13 07:27:15,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 646.9ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:27:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9388 states. [2021-10-13 07:27:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9388 to 9386. [2021-10-13 07:27:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9386 states, 9384 states have (on average 1.4164535379369139) internal successors, (13292), 9385 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9386 states to 9386 states and 13292 transitions. [2021-10-13 07:27:15,879 INFO L78 Accepts]: Start accepts. Automaton has 9386 states and 13292 transitions. Word has length 114 [2021-10-13 07:27:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:15,879 INFO L470 AbstractCegarLoop]: Abstraction has 9386 states and 13292 transitions. [2021-10-13 07:27:15,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9386 states and 13292 transitions. [2021-10-13 07:27:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-13 07:27:15,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:15,881 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:16,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:16,282 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:27:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2021-10-13 07:27:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:16,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749921538] [2021-10-13 07:27:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:16,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:16,284 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:16,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:27:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:19,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:21,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:27:21,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749921538] [2021-10-13 07:27:21,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749921538] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:21,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714596866] [2021-10-13 07:27:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:21,001 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:27:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:27:21,002 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:27:21,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 07:27:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:24,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:25,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714596866] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:25,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867026901] [2021-10-13 07:27:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:25,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:27:25,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:27:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae811ad-f50d-42bb-91d2-2126d643000e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 07:27:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:27:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867026901] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:30,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-10-13 07:27:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683769292] [2021-10-13 07:27:30,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:27:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:27:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:27:30,493 INFO L87 Difference]: Start difference. First operand 9386 states and 13292 transitions. Second operand has 16 states, 16 states have (on average 12.3125) internal successors, (197), 15 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:37,407 INFO L93 Difference]: Finished difference Result 21854 states and 30203 transitions. [2021-10-13 07:27:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 07:27:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.3125) internal successors, (197), 15 states have internal predecessors, (197), 0 states have call successors, (0), 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 114 [2021-10-13 07:27:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:37,442 INFO L225 Difference]: With dead ends: 21854 [2021-10-13 07:27:37,442 INFO L226 Difference]: Without dead ends: 16670 [2021-10-13 07:27:37,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2497.7ms TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 07:27:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16670 states.