./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF --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 adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:58,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:58,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:58,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:58,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:58,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:58,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:58,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:58,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:58,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:58,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:58,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:58,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:58,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:58,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:58,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:58,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:58,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:58,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:58,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:58,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:58,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:58,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:58,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:58,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:58,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:58,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:58,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:58,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:58,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:58,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:58,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:58,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:58,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:58,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:58,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:58,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:58,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:58,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:58,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:58,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:58,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:52:58,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:58,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:58,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:58,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:58,580 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:58,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:58,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:58,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:52:58,581 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:58,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:58,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:52:58,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:52:58,582 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:58,582 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:52:58,582 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:52:58,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:52:58,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:58,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:58,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:52:58,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:58,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:58,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:58,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:58,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:58,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:58,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:58,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:58,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:58,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:58,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:58,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:58,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:58,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:58,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:58,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:58,588 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:52:58,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:52:58,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:58,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:58,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:58,589 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_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-12 22:52:58,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:58,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:58,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:58,911 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:58,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:58,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-12 22:52:58,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/0f67e735f/9cfd61cc81da4014a1d6a83dcda7ce84/FLAG51924f802 [2021-11-12 22:52:59,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:59,671 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-12 22:52:59,718 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/0f67e735f/9cfd61cc81da4014a1d6a83dcda7ce84/FLAG51924f802 [2021-11-12 22:52:59,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/0f67e735f/9cfd61cc81da4014a1d6a83dcda7ce84 [2021-11-12 22:52:59,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:59,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:59,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:59,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:59,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:59,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:59" (1/1) ... [2021-11-12 22:52:59,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448be554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:59, skipping insertion in model container [2021-11-12 22:52:59,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:59" (1/1) ... [2021-11-12 22:52:59,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:00,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:00,432 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_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-12 22:53:00,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:00,456 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:53:00,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@337bfbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:00, skipping insertion in model container [2021-11-12 22:53:00,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:00,457 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:53:00,459 INFO L158 Benchmark]: Toolchain (without parser) took 572.45ms. Allocated memory was 79.7MB in the beginning and 113.2MB in the end (delta: 33.6MB). Free memory was 41.3MB in the beginning and 80.3MB in the end (delta: -39.0MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-12 22:53:00,461 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:53:00,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 566.87ms. Allocated memory was 79.7MB in the beginning and 113.2MB in the end (delta: 33.6MB). Free memory was 41.1MB in the beginning and 80.3MB in the end (delta: -39.2MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-12 22:53:00,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 41.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 566.87ms. Allocated memory was 79.7MB in the beginning and 113.2MB in the end (delta: 33.6MB). Free memory was 41.1MB in the beginning and 80.3MB in the end (delta: -39.2MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF --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 adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:02,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:02,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:02,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:02,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:02,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:02,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:02,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:02,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:02,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:02,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:02,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:02,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:02,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:02,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:02,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:02,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:02,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:02,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:02,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:02,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:02,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:02,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:02,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:02,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:02,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:02,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:02,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:02,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:02,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:02,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:02,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:02,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:02,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:02,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:02,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:02,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:02,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:02,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:02,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:02,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:02,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:53:02,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:02,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:02,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:02,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:02,790 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:02,791 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:02,791 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:02,791 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:02,791 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:02,791 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:02,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:02,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:02,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:02,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:02,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:02,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:02,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:02,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:02,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:02,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:02,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:53:02,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:02,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:02,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:02,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:02,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:02,796 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:53:02,796 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:02,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:02,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:02,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:02,797 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_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-12 22:53:03,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:03,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:03,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:03,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:03,173 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:03,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-12 22:53:03,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/17c229a74/f11a6241dbbd4adeb409af92c958c739/FLAG570e7c194 [2021-11-12 22:53:03,856 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:03,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-12 22:53:03,881 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/17c229a74/f11a6241dbbd4adeb409af92c958c739/FLAG570e7c194 [2021-11-12 22:53:04,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/data/17c229a74/f11a6241dbbd4adeb409af92c958c739 [2021-11-12 22:53:04,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:04,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:04,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:04,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:04,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:04,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:04" (1/1) ... [2021-11-12 22:53:04,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f382232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:04, skipping insertion in model container [2021-11-12 22:53:04,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:04" (1/1) ... [2021-11-12 22:53:04,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:04,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:04,773 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_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-12 22:53:04,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:04,815 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:53:04,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:04,978 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_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-12 22:53:04,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:04,988 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:53:05,115 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_8b5ff18b-1327-4763-8926-199c7896d839/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-12 22:53:05,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:05,146 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:53:05,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05 WrapperNode [2021-11-12 22:53:05,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:05,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:05,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:53:05,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:53:05,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:05,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:53:05,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:53:05,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:53:05,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:53:05,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:53:05,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:53:05,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:53:05,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (1/1) ... [2021-11-12 22:53:05,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:05,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:53:05,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:53:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:53:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:53:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:53:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:53:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:53:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:53:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:53:05,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:53:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:53:05,724 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:53:16,475 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 22:53:16,476 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 22:53:16,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:53:16,484 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:53:16,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:16 BoogieIcfgContainer [2021-11-12 22:53:16,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:53:16,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:53:16,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:53:16,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:53:16,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:53:04" (1/3) ... [2021-11-12 22:53:16,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc192a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:16, skipping insertion in model container [2021-11-12 22:53:16,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:05" (2/3) ... [2021-11-12 22:53:16,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc192a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:16, skipping insertion in model container [2021-11-12 22:53:16,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:16" (3/3) ... [2021-11-12 22:53:16,495 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-11-12 22:53:16,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:53:16,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:53:16,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:53:16,557 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:53:16,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:53:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:53:16,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:16,603 INFO L514 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] [2021-11-12 22:53:16,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2021-11-12 22:53:16,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:16,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196203404] [2021-11-12 22:53:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:16,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:16,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:16,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:53:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:17,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:53:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:53:17,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:17,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 22:53:17,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:17,412 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 22:53:17,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 22:53:18,099 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 22:53:18,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-12 22:53:18,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:18,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 22:53:18,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:18,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 22:53:18,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 22:53:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-12 22:53:18,621 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 22:53:18,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:53:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:18,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:53:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 22:53:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 22:53:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:18,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:19,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 22:53:19,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 22:53:19,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 22:53:19,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 22:53:19,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 22:53:19,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 22:53:19,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 22:53:19,404 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:19,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 22:53:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:19,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:19,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196203404] [2021-11-12 22:53:19,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196203404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:19,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:53:19,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893920927] [2021-11-12 22:53:19,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:19,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:19,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:20,013 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:22,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:26,324 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2021-11-12 22:53:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 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 44 [2021-11-12 22:53:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:26,340 INFO L225 Difference]: With dead ends: 311 [2021-11-12 22:53:26,340 INFO L226 Difference]: Without dead ends: 142 [2021-11-12 22:53:26,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:26,352 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 16 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6011.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 6218.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:26,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 866 Invalid, 184 Unknown, 0 Unchecked, 7.47ms Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 1 Unknown, 66 Unchecked, 6218.56ms Time] [2021-11-12 22:53:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-12 22:53:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-12 22:53:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.553191489361702) internal successors, (219), 141 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 219 transitions. [2021-11-12 22:53:26,396 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 219 transitions. Word has length 44 [2021-11-12 22:53:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:26,396 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 219 transitions. [2021-11-12 22:53:26,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 219 transitions. [2021-11-12 22:53:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:53:26,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:26,399 INFO L514 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] [2021-11-12 22:53:26,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:26,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:26,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1166662538, now seen corresponding path program 1 times [2021-11-12 22:53:26,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:26,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157644270] [2021-11-12 22:53:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:26,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:26,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:26,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:26,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:53:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:27,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:27,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:27,537 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:53:27,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:53:30,987 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:53:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:53:38,738 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:53:38,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:53:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:38,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:47,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:47,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157644270] [2021-11-12 22:53:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157644270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:47,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:47,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-12 22:53:47,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924223274] [2021-11-12 22:53:47,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:47,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:47,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:47,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:47,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 22:53:47,118 INFO L87 Difference]: Start difference. First operand 142 states and 219 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:47,653 INFO L93 Difference]: Finished difference Result 289 states and 449 transitions. [2021-11-12 22:53:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-12 22:53:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:47,656 INFO L225 Difference]: With dead ends: 289 [2021-11-12 22:53:47,656 INFO L226 Difference]: Without dead ends: 157 [2021-11-12 22:53:47,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 22:53:47,659 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 26 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 506.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 518.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:47,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 630 Invalid, 107 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 103 Unchecked, 518.51ms Time] [2021-11-12 22:53:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-12 22:53:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-11-12 22:53:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 152 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2021-11-12 22:53:47,690 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 44 [2021-11-12 22:53:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:47,690 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2021-11-12 22:53:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2021-11-12 22:53:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 22:53:47,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:47,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:53:47,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:53:47,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:47,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -616728635, now seen corresponding path program 1 times [2021-11-12 22:53:47,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:47,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653627872] [2021-11-12 22:53:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:47,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:47,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:47,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:48,685 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:53:48,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:53:51,894 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:53:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:53:59,102 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:53:59,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:53:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:59,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:59,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:59,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653627872] [2021-11-12 22:53:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653627872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:59,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:59,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:53:59,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743719460] [2021-11-12 22:53:59,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:59,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:59,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:53:59,471 INFO L87 Difference]: Start difference. First operand 153 states and 238 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:01,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:05,345 INFO L93 Difference]: Finished difference Result 314 states and 487 transitions. [2021-11-12 22:54:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 57 [2021-11-12 22:54:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:05,349 INFO L225 Difference]: With dead ends: 314 [2021-11-12 22:54:05,349 INFO L226 Difference]: Without dead ends: 182 [2021-11-12 22:54:05,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:05,351 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 38 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5687.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 5855.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:05,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 918 Invalid, 302 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [31 Valid, 117 Invalid, 1 Unknown, 153 Unchecked, 5855.23ms Time] [2021-11-12 22:54:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-12 22:54:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2021-11-12 22:54:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 168 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-11-12 22:54:05,365 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 57 [2021-11-12 22:54:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:05,366 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-11-12 22:54:05,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-11-12 22:54:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:54:05,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:05,369 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:05,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:54:05,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,583 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2106199760, now seen corresponding path program 1 times [2021-11-12 22:54:05,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:05,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448018972] [2021-11-12 22:54:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:05,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:05,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:05,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:54:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:06,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:06,456 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:54:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:54:09,653 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:54:09,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:54:16,303 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:54:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:54:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:16,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:16,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448018972] [2021-11-12 22:54:16,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448018972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:16,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:16,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:54:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414009670] [2021-11-12 22:54:16,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:16,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:16,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:16,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:16,754 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:18,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:22,920 INFO L93 Difference]: Finished difference Result 328 states and 512 transitions. [2021-11-12 22:54:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:22,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 22:54:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:22,926 INFO L225 Difference]: With dead ends: 328 [2021-11-12 22:54:22,926 INFO L226 Difference]: Without dead ends: 180 [2021-11-12 22:54:22,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:22,929 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 23 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5989.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 6148.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:22,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 836 Invalid, 239 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 1 Unknown, 109 Unchecked, 6148.04ms Time] [2021-11-12 22:54:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-12 22:54:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-12 22:54:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.547486033519553) internal successors, (277), 179 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 277 transitions. [2021-11-12 22:54:22,943 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 277 transitions. Word has length 58 [2021-11-12 22:54:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 277 transitions. [2021-11-12 22:54:22,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 277 transitions. [2021-11-12 22:54:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:54:22,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:22,947 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:22,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:23,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:23,174 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1058688956, now seen corresponding path program 1 times [2021-11-12 22:54:23,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:23,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771628848] [2021-11-12 22:54:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:23,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:23,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:54:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:23,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:23,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:23,964 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:54:23,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:54:27,285 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:54:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:54:34,008 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:54:34,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:54:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:34,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:34,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771628848] [2021-11-12 22:54:34,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771628848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:34,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:34,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:54:34,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249075533] [2021-11-12 22:54:34,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:34,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:34,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:34,492 INFO L87 Difference]: Start difference. First operand 180 states and 277 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:36,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:39,374 INFO L93 Difference]: Finished difference Result 352 states and 544 transitions. [2021-11-12 22:54:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 22:54:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:39,378 INFO L225 Difference]: With dead ends: 352 [2021-11-12 22:54:39,378 INFO L226 Difference]: Without dead ends: 193 [2021-11-12 22:54:39,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:39,379 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 27 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4700.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 4865.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:39,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 734 Invalid, 161 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 1 Unknown, 35 Unchecked, 4865.03ms Time] [2021-11-12 22:54:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-12 22:54:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-12 22:54:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.53125) internal successors, (294), 192 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 294 transitions. [2021-11-12 22:54:39,393 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 294 transitions. Word has length 58 [2021-11-12 22:54:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:39,393 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 294 transitions. [2021-11-12 22:54:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 294 transitions. [2021-11-12 22:54:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:54:39,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:39,397 INFO L514 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] [2021-11-12 22:54:39,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:39,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:39,607 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -77177339, now seen corresponding path program 1 times [2021-11-12 22:54:39,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:39,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565563920] [2021-11-12 22:54:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:39,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:39,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:39,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:54:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:39,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:40,350 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:54:40,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:54:43,796 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:54:43,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:54:51,449 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:54:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:54:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:51,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:51,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565563920] [2021-11-12 22:54:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565563920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:51,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:54:51,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235057200] [2021-11-12 22:54:51,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:51,975 INFO L87 Difference]: Start difference. First operand 193 states and 294 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:52,724 INFO L93 Difference]: Finished difference Result 367 states and 561 transitions. [2021-11-12 22:54:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 22:54:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:52,727 INFO L225 Difference]: With dead ends: 367 [2021-11-12 22:54:52,727 INFO L226 Difference]: Without dead ends: 195 [2021-11-12 22:54:52,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:54:52,729 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 11 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 711.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 735.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:52,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 950 Invalid, 196 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 189 Unchecked, 735.61ms Time] [2021-11-12 22:54:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-12 22:54:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-11-12 22:54:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5260416666666667) internal successors, (293), 192 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 293 transitions. [2021-11-12 22:54:52,745 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 293 transitions. Word has length 58 [2021-11-12 22:54:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:52,746 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 293 transitions. [2021-11-12 22:54:52,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 293 transitions. [2021-11-12 22:54:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:54:52,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:52,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:52,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:52,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1243675973, now seen corresponding path program 1 times [2021-11-12 22:54:52,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:52,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487516513] [2021-11-12 22:54:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:52,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:52,967 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:53,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:54:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:53,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:53,960 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:54:53,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:54:57,326 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:54:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:55:04,742 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:55:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:55:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:05,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:05,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487516513] [2021-11-12 22:55:05,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487516513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:05,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:05,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:05,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671113574] [2021-11-12 22:55:05,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:05,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:05,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:05,211 INFO L87 Difference]: Start difference. First operand 193 states and 293 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:07,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:09,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:13,271 INFO L93 Difference]: Finished difference Result 388 states and 592 transitions. [2021-11-12 22:55:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 58 [2021-11-12 22:55:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:13,276 INFO L225 Difference]: With dead ends: 388 [2021-11-12 22:55:13,276 INFO L226 Difference]: Without dead ends: 216 [2021-11-12 22:55:13,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:13,278 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 37 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7874.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 8042.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:13,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 546 Invalid, 163 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 1 Unknown, 46 Unchecked, 8042.06ms Time] [2021-11-12 22:55:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-12 22:55:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 198. [2021-11-12 22:55:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 197 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2021-11-12 22:55:13,289 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 58 [2021-11-12 22:55:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:13,289 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2021-11-12 22:55:13,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2021-11-12 22:55:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:55:13,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:13,291 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:13,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:13,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash 967076732, now seen corresponding path program 1 times [2021-11-12 22:55:13,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:13,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566757055] [2021-11-12 22:55:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:13,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:13,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:13,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:55:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:13,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:13,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:14,364 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:55:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:55:17,611 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:55:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:55:24,446 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:55:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:55:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:24,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:24,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566757055] [2021-11-12 22:55:24,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566757055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:24,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:24,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:24,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271731153] [2021-11-12 22:55:24,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:24,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:24,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:24,838 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:26,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:29,681 INFO L93 Difference]: Finished difference Result 386 states and 590 transitions. [2021-11-12 22:55:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 22:55:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:29,686 INFO L225 Difference]: With dead ends: 386 [2021-11-12 22:55:29,686 INFO L226 Difference]: Without dead ends: 209 [2021-11-12 22:55:29,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:29,688 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4618.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4822.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:29,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 752 Invalid, 161 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [25 Valid, 99 Invalid, 1 Unknown, 36 Unchecked, 4822.22ms Time] [2021-11-12 22:55:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-12 22:55:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2021-11-12 22:55:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.5151515151515151) internal successors, (300), 198 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 300 transitions. [2021-11-12 22:55:29,701 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 300 transitions. Word has length 59 [2021-11-12 22:55:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 300 transitions. [2021-11-12 22:55:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 300 transitions. [2021-11-12 22:55:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 22:55:29,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:29,703 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:29,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:55:29,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:29,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 800295895, now seen corresponding path program 1 times [2021-11-12 22:55:29,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:29,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604175866] [2021-11-12 22:55:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:29,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:29,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:29,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:55:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:30,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:30,736 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:55:30,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:55:34,053 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:55:34,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:55:41,121 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:55:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:55:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:41,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:41,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:41,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604175866] [2021-11-12 22:55:41,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604175866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:41,541 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:41,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:41,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953683964] [2021-11-12 22:55:41,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:41,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:41,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:41,543 INFO L87 Difference]: Start difference. First operand 199 states and 300 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:43,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:45,959 INFO L93 Difference]: Finished difference Result 378 states and 576 transitions. [2021-11-12 22:55:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 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 60 [2021-11-12 22:55:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:45,965 INFO L225 Difference]: With dead ends: 378 [2021-11-12 22:55:45,965 INFO L226 Difference]: Without dead ends: 200 [2021-11-12 22:55:45,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:45,967 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4228.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 4399.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:45,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 943 Invalid, 325 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 1 Unknown, 201 Unchecked, 4399.58ms Time] [2021-11-12 22:55:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-12 22:55:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-11-12 22:55:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5025125628140703) internal successors, (299), 199 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 299 transitions. [2021-11-12 22:55:45,979 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 299 transitions. Word has length 60 [2021-11-12 22:55:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:45,980 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 299 transitions. [2021-11-12 22:55:45,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 299 transitions. [2021-11-12 22:55:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:55:45,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:45,982 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:46,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:46,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:46,199 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1696711945, now seen corresponding path program 1 times [2021-11-12 22:55:46,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:46,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541152058] [2021-11-12 22:55:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:46,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:46,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:46,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:55:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:46,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:46,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:46,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:46,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:47,063 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:55:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:55:50,335 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:55:50,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:55:57,419 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:55:57,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:55:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:57,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:57,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:57,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541152058] [2021-11-12 22:55:57,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541152058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:57,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:57,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:57,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785882759] [2021-11-12 22:55:57,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:57,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:57,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:57,864 INFO L87 Difference]: Start difference. First operand 200 states and 299 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:58,184 INFO L93 Difference]: Finished difference Result 391 states and 588 transitions. [2021-11-12 22:55:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 22:55:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:58,187 INFO L225 Difference]: With dead ends: 391 [2021-11-12 22:55:58,187 INFO L226 Difference]: Without dead ends: 212 [2021-11-12 22:55:58,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:55:58,188 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 6 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 308.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:58,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 772 Invalid, 106 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 102 Unchecked, 308.73ms Time] [2021-11-12 22:55:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-12 22:55:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-12 22:55:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.4834123222748816) internal successors, (313), 211 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 313 transitions. [2021-11-12 22:55:58,201 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 313 transitions. Word has length 61 [2021-11-12 22:55:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:58,201 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 313 transitions. [2021-11-12 22:55:58,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 313 transitions. [2021-11-12 22:55:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:55:58,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:58,203 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:58,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:58,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:58,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1023713137, now seen corresponding path program 1 times [2021-11-12 22:55:58,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:58,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735928529] [2021-11-12 22:55:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:58,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:58,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:58,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:58,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:55:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:58,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:58,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:58,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:58,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:59,320 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:55:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:56:00,556 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:56:00,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:56:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:00,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:00,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735928529] [2021-11-12 22:56:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735928529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:00,908 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:56:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990929984] [2021-11-12 22:56:00,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:00,909 INFO L87 Difference]: Start difference. First operand 212 states and 313 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:02,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:04,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:11,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:12,090 INFO L93 Difference]: Finished difference Result 431 states and 644 transitions. [2021-11-12 22:56:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:56:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2021-11-12 22:56:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:12,095 INFO L225 Difference]: With dead ends: 431 [2021-11-12 22:56:12,095 INFO L226 Difference]: Without dead ends: 252 [2021-11-12 22:56:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:12,096 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 56 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10791.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11096.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:12,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 553 Invalid, 177 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 11096.14ms Time] [2021-11-12 22:56:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-12 22:56:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2021-11-12 22:56:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.48068669527897) internal successors, (345), 233 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 345 transitions. [2021-11-12 22:56:12,109 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 345 transitions. Word has length 61 [2021-11-12 22:56:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:12,109 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 345 transitions. [2021-11-12 22:56:12,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 345 transitions. [2021-11-12 22:56:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:56:12,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:12,111 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:56:12,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:12,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:12,326 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -435794695, now seen corresponding path program 1 times [2021-11-12 22:56:12,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:12,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516718890] [2021-11-12 22:56:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:12,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:12,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:12,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:56:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:13,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:13,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516718890] [2021-11-12 22:56:13,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516718890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:13,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:13,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:56:13,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599390399] [2021-11-12 22:56:13,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:56:13,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:56:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:56:13,045 INFO L87 Difference]: Start difference. First operand 234 states and 345 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:13,118 INFO L93 Difference]: Finished difference Result 831 states and 1247 transitions. [2021-11-12 22:56:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:56:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 22:56:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:13,123 INFO L225 Difference]: With dead ends: 831 [2021-11-12 22:56:13,123 INFO L226 Difference]: Without dead ends: 630 [2021-11-12 22:56:13,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:56:13,125 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 389 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:13,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 888 Invalid, 16 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 52.00ms Time] [2021-11-12 22:56:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-12 22:56:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 432. [2021-11-12 22:56:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.480278422273782) internal successors, (638), 431 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 638 transitions. [2021-11-12 22:56:13,146 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 638 transitions. Word has length 61 [2021-11-12 22:56:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 638 transitions. [2021-11-12 22:56:13,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 638 transitions. [2021-11-12 22:56:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:56:13,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:13,149 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:56:13,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:13,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:13,370 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1809784759, now seen corresponding path program 1 times [2021-11-12 22:56:13,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:13,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095292021] [2021-11-12 22:56:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:13,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:13,372 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:13,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:56:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:13,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:13,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:14,094 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:56:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:56:17,276 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:56:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:56:24,229 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:56:24,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:56:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:24,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:24,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:24,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095292021] [2021-11-12 22:56:24,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095292021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:24,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:24,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:56:24,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874899262] [2021-11-12 22:56:24,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:24,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:24,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:56:24,592 INFO L87 Difference]: Start difference. First operand 432 states and 638 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:24,799 INFO L93 Difference]: Finished difference Result 628 states and 928 transitions. [2021-11-12 22:56:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:56:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 22:56:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:24,802 INFO L225 Difference]: With dead ends: 628 [2021-11-12 22:56:24,803 INFO L226 Difference]: Without dead ends: 432 [2021-11-12 22:56:24,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:56:24,804 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 9 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 187.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:24,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 680 Invalid, 120 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 114 Unchecked, 187.41ms Time] [2021-11-12 22:56:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-12 22:56:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-12 22:56:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.4779582366589328) internal successors, (637), 431 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 637 transitions. [2021-11-12 22:56:24,825 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 637 transitions. Word has length 61 [2021-11-12 22:56:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:24,825 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 637 transitions. [2021-11-12 22:56:24,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 637 transitions. [2021-11-12 22:56:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:56:24,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:24,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:56:24,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:25,043 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1586771530, now seen corresponding path program 1 times [2021-11-12 22:56:25,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:25,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322468567] [2021-11-12 22:56:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:25,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:25,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:56:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:25,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:25,843 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:56:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:56:26,599 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:56:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:56:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:26,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:56:26,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:26,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322468567] [2021-11-12 22:56:26,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322468567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:26,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:26,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:56:26,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745401531] [2021-11-12 22:56:26,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:26,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:26,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:26,947 INFO L87 Difference]: Start difference. First operand 432 states and 637 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:28,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:38,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:45,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:48,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:51,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:53,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:58,997 INFO L93 Difference]: Finished difference Result 1067 states and 1601 transitions. [2021-11-12 22:56:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 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 75 [2021-11-12 22:56:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:59,003 INFO L225 Difference]: With dead ends: 1067 [2021-11-12 22:56:59,003 INFO L226 Difference]: Without dead ends: 672 [2021-11-12 22:56:59,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:59,005 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 183 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31175.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31902.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:59,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 629 Invalid, 551 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [70 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 31902.80ms Time] [2021-11-12 22:56:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-12 22:56:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 434. [2021-11-12 22:56:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.4711316397228638) internal successors, (637), 433 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 637 transitions. [2021-11-12 22:56:59,028 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 637 transitions. Word has length 75 [2021-11-12 22:56:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 637 transitions. [2021-11-12 22:56:59,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 637 transitions. [2021-11-12 22:56:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 22:56:59,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:59,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:56:59,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:56:59,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,248 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash 786481298, now seen corresponding path program 1 times [2021-11-12 22:56:59,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:59,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927744804] [2021-11-12 22:56:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:59,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:59,253 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:59,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:56:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:59,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:59,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:59,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:59,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:59,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:00,101 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:57:00,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:57:00,674 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:57:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:57:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:00,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:57:01,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:01,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927744804] [2021-11-12 22:57:01,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927744804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:01,044 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:01,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:57:01,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598828910] [2021-11-12 22:57:01,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:57:01,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:57:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:01,045 INFO L87 Difference]: Start difference. First operand 434 states and 637 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:03,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:05,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:08,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:11,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:14,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:17,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:18,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:21,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:25,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:27,610 INFO L93 Difference]: Finished difference Result 1049 states and 1572 transitions. [2021-11-12 22:57:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 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 78 [2021-11-12 22:57:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:27,617 INFO L225 Difference]: With dead ends: 1049 [2021-11-12 22:57:27,617 INFO L226 Difference]: Without dead ends: 652 [2021-11-12 22:57:27,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:27,626 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 180 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25798.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26434.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:27,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 537 Invalid, 448 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [61 Valid, 385 Invalid, 2 Unknown, 0 Unchecked, 26434.35ms Time] [2021-11-12 22:57:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-12 22:57:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 434. [2021-11-12 22:57:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.4572748267898383) internal successors, (631), 433 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 631 transitions. [2021-11-12 22:57:27,652 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 631 transitions. Word has length 78 [2021-11-12 22:57:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:27,652 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 631 transitions. [2021-11-12 22:57:27,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 631 transitions. [2021-11-12 22:57:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:57:27,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:27,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:57:27,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:27,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:27,871 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1369586491, now seen corresponding path program 1 times [2021-11-12 22:57:27,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:27,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312663180] [2021-11-12 22:57:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:27,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:27,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:27,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:57:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:28,446 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:57:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:57:28,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:28,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:28,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:28,758 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:57:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:57:30,678 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:57:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:57:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:30,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:31,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:31,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312663180] [2021-11-12 22:57:31,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312663180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:31,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:31,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:57:31,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338026787] [2021-11-12 22:57:31,036 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:31,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:31,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:31,037 INFO L87 Difference]: Start difference. First operand 434 states and 631 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:33,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:35,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:51,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:53,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:55,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:01,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:04,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:07,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:10,728 INFO L93 Difference]: Finished difference Result 1294 states and 1922 transitions. [2021-11-12 22:58:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 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 83 [2021-11-12 22:58:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:10,735 INFO L225 Difference]: With dead ends: 1294 [2021-11-12 22:58:10,736 INFO L226 Difference]: Without dead ends: 897 [2021-11-12 22:58:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:10,738 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 249 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 77 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38483.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.57ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39523.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:10,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 841 Invalid, 708 Unknown, 0 Unchecked, 4.57ms Time], IncrementalHoareTripleChecker [77 Valid, 629 Invalid, 2 Unknown, 0 Unchecked, 39523.55ms Time] [2021-11-12 22:58:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-11-12 22:58:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 540. [2021-11-12 22:58:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4823747680890538) internal successors, (799), 539 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 799 transitions. [2021-11-12 22:58:10,789 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 799 transitions. Word has length 83 [2021-11-12 22:58:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:10,790 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 799 transitions. [2021-11-12 22:58:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 799 transitions. [2021-11-12 22:58:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:58:10,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:10,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:58:10,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:11,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:11,012 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash -733688034, now seen corresponding path program 1 times [2021-11-12 22:58:11,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:11,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738902912] [2021-11-12 22:58:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:11,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:11,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:11,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:58:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:11,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:11,658 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:58:11,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:58:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:12,043 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:58:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:58:14,265 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:58:14,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:58:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:14,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:14,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738902912] [2021-11-12 22:58:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738902912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:14,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:14,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:58:14,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892478653] [2021-11-12 22:58:14,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:14,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:58:14,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:58:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:14,690 INFO L87 Difference]: Start difference. First operand 540 states and 799 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:16,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:25,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:26,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:32,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:33,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:34,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:42,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:45,833 INFO L93 Difference]: Finished difference Result 1428 states and 2151 transitions. [2021-11-12 22:58:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 84 [2021-11-12 22:58:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:45,841 INFO L225 Difference]: With dead ends: 1428 [2021-11-12 22:58:45,842 INFO L226 Difference]: Without dead ends: 925 [2021-11-12 22:58:45,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:45,844 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 379 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30251.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31009.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:45,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 739 Invalid, 606 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [84 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 31009.62ms Time] [2021-11-12 22:58:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-12 22:58:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 584. [2021-11-12 22:58:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.5180102915951972) internal successors, (885), 583 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 885 transitions. [2021-11-12 22:58:45,881 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 885 transitions. Word has length 84 [2021-11-12 22:58:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 885 transitions. [2021-11-12 22:58:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 885 transitions. [2021-11-12 22:58:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:58:45,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:45,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:58:45,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:46,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:46,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1757322439, now seen corresponding path program 1 times [2021-11-12 22:58:46,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:46,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411802671] [2021-11-12 22:58:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:46,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:46,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:46,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:58:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:46,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:46,982 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:58:46,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:58:47,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:47,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:47,459 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:58:47,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:58:49,429 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:58:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:58:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:49,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:50,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:50,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411802671] [2021-11-12 22:58:50,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411802671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:50,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:50,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:58:50,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922225270] [2021-11-12 22:58:50,159 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:50,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:58:50,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:58:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:50,161 INFO L87 Difference]: Start difference. First operand 584 states and 885 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:52,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:54,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:02,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:04,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:05,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:06,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:09,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:13,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:15,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:17,295 INFO L93 Difference]: Finished difference Result 1541 states and 2365 transitions. [2021-11-12 22:59:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 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 112 [2021-11-12 22:59:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:17,300 INFO L225 Difference]: With dead ends: 1541 [2021-11-12 22:59:17,300 INFO L226 Difference]: Without dead ends: 994 [2021-11-12 22:59:17,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:17,301 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 298 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26376.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26968.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:17,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 564 Invalid, 432 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [54 Valid, 376 Invalid, 2 Unknown, 0 Unchecked, 26968.09ms Time] [2021-11-12 22:59:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-11-12 22:59:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 683. [2021-11-12 22:59:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 1.530791788856305) internal successors, (1044), 682 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1044 transitions. [2021-11-12 22:59:17,334 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1044 transitions. Word has length 112 [2021-11-12 22:59:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:17,334 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1044 transitions. [2021-11-12 22:59:17,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1044 transitions. [2021-11-12 22:59:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:59:17,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:17,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:59:17,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:17,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:17,553 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash -515891760, now seen corresponding path program 1 times [2021-11-12 22:59:17,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:17,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380297086] [2021-11-12 22:59:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:17,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:59:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:59:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:18,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380297086] [2021-11-12 22:59:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380297086] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:18,347 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:59:18,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652818013] [2021-11-12 22:59:18,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:18,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:18,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:59:18,349 INFO L87 Difference]: Start difference. First operand 683 states and 1044 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) [2021-11-12 22:59:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:19,134 INFO L93 Difference]: Finished difference Result 2542 states and 3933 transitions. [2021-11-12 22:59:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:19,135 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 118 [2021-11-12 22:59:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:19,143 INFO L225 Difference]: With dead ends: 2542 [2021-11-12 22:59:19,143 INFO L226 Difference]: Without dead ends: 1896 [2021-11-12 22:59:19,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:59:19,145 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 421 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 715.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 744.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:19,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 604 Invalid, 117 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [42 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 744.43ms Time] [2021-11-12 22:59:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-11-12 22:59:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1883. [2021-11-12 22:59:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 1.5324123273113708) internal successors, (2884), 1882 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2884 transitions. [2021-11-12 22:59:19,223 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2884 transitions. Word has length 118 [2021-11-12 22:59:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:19,223 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 2884 transitions. [2021-11-12 22:59:19,224 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) [2021-11-12 22:59:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2884 transitions. [2021-11-12 22:59:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:59:19,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:19,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:59:19,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:19,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:19,443 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1887699058, now seen corresponding path program 1 times [2021-11-12 22:59:19,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:19,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567520470] [2021-11-12 22:59:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:19,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:19,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:19,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:59:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:19,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:20,025 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:59:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:59:20,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:20,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:20,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:20,463 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:59:22,265 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:59:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:22,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:22,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:22,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567520470] [2021-11-12 22:59:22,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567520470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:22,787 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:22,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:59:22,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942332014] [2021-11-12 22:59:22,788 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:22,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:22,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:22,789 INFO L87 Difference]: Start difference. First operand 1883 states and 2884 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:24,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:32,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:37,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:39,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:46,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:49,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:49,264 INFO L93 Difference]: Finished difference Result 5127 states and 7796 transitions. [2021-11-12 22:59:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 118 [2021-11-12 22:59:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:49,284 INFO L225 Difference]: With dead ends: 5127 [2021-11-12 22:59:49,284 INFO L226 Difference]: Without dead ends: 3281 [2021-11-12 22:59:49,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:49,288 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 378 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 77 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25619.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26241.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:49,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 526 Invalid, 478 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [77 Valid, 397 Invalid, 4 Unknown, 0 Unchecked, 26241.07ms Time] [2021-11-12 22:59:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2021-11-12 22:59:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 2291. [2021-11-12 22:59:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.537117903930131) internal successors, (3520), 2290 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3520 transitions. [2021-11-12 22:59:49,450 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3520 transitions. Word has length 118 [2021-11-12 22:59:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:49,451 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3520 transitions. [2021-11-12 22:59:49,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3520 transitions. [2021-11-12 22:59:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:59:49,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:49,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:59:49,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:49,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:49,679 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1750138219, now seen corresponding path program 1 times [2021-11-12 22:59:49,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:49,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911294055] [2021-11-12 22:59:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:49,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:49,683 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:59:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:50,694 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:59:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:59:50,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:50,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:50,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:51,229 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:51,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:59:53,674 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:53,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:59:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:53,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:54,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:54,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911294055] [2021-11-12 22:59:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911294055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:54,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:54,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:59:54,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138772233] [2021-11-12 22:59:54,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:54,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:54,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:54,362 INFO L87 Difference]: Start difference. First operand 2291 states and 3520 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:56,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:58,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:17,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:18,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:26,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:28,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:29,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:31,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:32,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:33,310 INFO L93 Difference]: Finished difference Result 5501 states and 8372 transitions. [2021-11-12 23:00:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 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 119 [2021-11-12 23:00:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:33,324 INFO L225 Difference]: With dead ends: 5501 [2021-11-12 23:00:33,324 INFO L226 Difference]: Without dead ends: 3247 [2021-11-12 23:00:33,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:00:33,327 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 234 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 75 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37849.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.73ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38742.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:33,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 792 Invalid, 701 Unknown, 0 Unchecked, 11.73ms Time], IncrementalHoareTripleChecker [75 Valid, 623 Invalid, 3 Unknown, 0 Unchecked, 38742.92ms Time] [2021-11-12 23:00:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-11-12 23:00:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2291. [2021-11-12 23:00:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.531877729257642) internal successors, (3508), 2290 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3508 transitions. [2021-11-12 23:00:33,433 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3508 transitions. Word has length 119 [2021-11-12 23:00:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:33,434 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3508 transitions. [2021-11-12 23:00:33,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3508 transitions. [2021-11-12 23:00:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:00:33,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:33,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:33,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:33,663 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2035928498, now seen corresponding path program 1 times [2021-11-12 23:00:33,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:33,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010418049] [2021-11-12 23:00:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:33,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:33,665 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:33,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:00:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:00:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:00:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:00:34,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:34,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010418049] [2021-11-12 23:00:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010418049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:34,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:34,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:00:34,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495497051] [2021-11-12 23:00:34,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:34,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:34,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:34,469 INFO L87 Difference]: Start difference. First operand 2291 states and 3508 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:35,246 INFO L93 Difference]: Finished difference Result 4598 states and 7045 transitions. [2021-11-12 23:00:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 126 [2021-11-12 23:00:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:35,257 INFO L225 Difference]: With dead ends: 4598 [2021-11-12 23:00:35,258 INFO L226 Difference]: Without dead ends: 2344 [2021-11-12 23:00:35,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:35,260 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 698.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 716.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:35,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 418 Invalid, 33 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 716.19ms Time] [2021-11-12 23:00:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-11-12 23:00:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2021-11-12 23:00:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 1.5258215962441315) internal successors, (3575), 2343 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3575 transitions. [2021-11-12 23:00:35,377 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3575 transitions. Word has length 126 [2021-11-12 23:00:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:35,378 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 3575 transitions. [2021-11-12 23:00:35,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3575 transitions. [2021-11-12 23:00:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:00:35,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:35,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:35,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:35,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:35,598 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1917487024, now seen corresponding path program 1 times [2021-11-12 23:00:35,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:35,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555871841] [2021-11-12 23:00:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:35,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:35,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:35,600 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:35,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:00:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:35,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:00:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:00:36,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:00:36,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:36,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555871841] [2021-11-12 23:00:36,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555871841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:36,456 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:36,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:00:36,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909760188] [2021-11-12 23:00:36,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:36,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:00:36,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:00:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:36,457 INFO L87 Difference]: Start difference. First operand 2344 states and 3575 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) [2021-11-12 23:00:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:36,595 INFO L93 Difference]: Finished difference Result 4655 states and 7114 transitions. [2021-11-12 23:00:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:00:36,595 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 126 [2021-11-12 23:00:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:36,607 INFO L225 Difference]: With dead ends: 4655 [2021-11-12 23:00:36,607 INFO L226 Difference]: Without dead ends: 2348 [2021-11-12 23:00:36,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:00:36,610 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:36,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 397 Invalid, 31 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 65.97ms Time] [2021-11-12 23:00:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-11-12 23:00:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2348. [2021-11-12 23:00:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2347 states have (on average 1.5249254367277376) internal successors, (3579), 2347 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3579 transitions. [2021-11-12 23:00:36,692 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3579 transitions. Word has length 126 [2021-11-12 23:00:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:36,693 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 3579 transitions. [2021-11-12 23:00:36,693 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) [2021-11-12 23:00:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3579 transitions. [2021-11-12 23:00:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:00:36,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:36,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:36,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:36,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,914 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash -485141759, now seen corresponding path program 1 times [2021-11-12 23:00:36,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:36,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648048547] [2021-11-12 23:00:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:36,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:36,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:36,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:00:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:00:37,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:37,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:37,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:37,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:37,526 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:00:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:00:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:37,872 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:00:37,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:00:40,345 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:00:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:00:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:00:40,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:00:41,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:41,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648048547] [2021-11-12 23:00:41,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648048547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:41,839 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:00:41,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530601873] [2021-11-12 23:00:41,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:00:41,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:00:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:00:41,841 INFO L87 Difference]: Start difference. First operand 2348 states and 3579 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:43,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:49,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:54,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:57,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:57,812 INFO L93 Difference]: Finished difference Result 5116 states and 7783 transitions. [2021-11-12 23:00:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 127 [2021-11-12 23:00:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:57,825 INFO L225 Difference]: With dead ends: 5116 [2021-11-12 23:00:57,825 INFO L226 Difference]: Without dead ends: 2809 [2021-11-12 23:00:57,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:00:57,828 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 120 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15431.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15829.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:57,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 519 Invalid, 240 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [10 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 15829.53ms Time] [2021-11-12 23:00:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-12 23:00:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2599. [2021-11-12 23:00:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 1.522709776751347) internal successors, (3956), 2598 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3956 transitions. [2021-11-12 23:00:57,938 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3956 transitions. Word has length 127 [2021-11-12 23:00:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:57,939 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 3956 transitions. [2021-11-12 23:00:57,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3956 transitions. [2021-11-12 23:00:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:00:57,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:57,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:57,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 23:00:58,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:58,159 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1930694591, now seen corresponding path program 1 times [2021-11-12 23:00:58,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:58,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669113434] [2021-11-12 23:00:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:58,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:58,161 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:58,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:00:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:00:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:58,775 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:00:58,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 23:00:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:58,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:59,100 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:00:59,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-12 23:01:00,205 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:01:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-12 23:01:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:01:00,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:01:01,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:01,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669113434] [2021-11-12 23:01:01,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669113434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:01,065 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:01,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:01:01,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586536746] [2021-11-12 23:01:01,065 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:01,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:01:01,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:01:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:01:01,066 INFO L87 Difference]: Start difference. First operand 2599 states and 3956 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:03,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:05,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:11,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:12,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:15,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:19,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:21,910 INFO L93 Difference]: Finished difference Result 5376 states and 8169 transitions. [2021-11-12 23:01:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:01:21,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 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 127 [2021-11-12 23:01:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:21,930 INFO L225 Difference]: With dead ends: 5376 [2021-11-12 23:01:21,931 INFO L226 Difference]: Without dead ends: 2818 [2021-11-12 23:01:21,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:01:21,935 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 27 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20219.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20689.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:21,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 722 Invalid, 268 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 4 Unknown, 0 Unchecked, 20689.55ms Time] [2021-11-12 23:01:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-11-12 23:01:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2740. [2021-11-12 23:01:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 1.5155166119021541) internal successors, (4151), 2739 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4151 transitions. [2021-11-12 23:01:22,045 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4151 transitions. Word has length 127 [2021-11-12 23:01:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:22,046 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 4151 transitions. [2021-11-12 23:01:22,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4151 transitions. [2021-11-12 23:01:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:01:22,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:22,050 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:01:22,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-12 23:01:22,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:22,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash 723213373, now seen corresponding path program 1 times [2021-11-12 23:01:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:22,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012839935] [2021-11-12 23:01:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:22,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:22,254 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:01:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:22,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:22,979 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:01:22,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:01:23,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:23,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:23,422 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:01:23,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:01:25,209 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:01:25,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:01:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:01:25,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:01:25,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:25,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012839935] [2021-11-12 23:01:25,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012839935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:25,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:25,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:01:25,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435250051] [2021-11-12 23:01:25,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:25,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:01:25,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:01:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:25,820 INFO L87 Difference]: Start difference. First operand 2740 states and 4151 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:27,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:29,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:42,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:44,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:48,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:50,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:52,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:54,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:57,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:59,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:00,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:04,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:05,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:11,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:11,909 INFO L93 Difference]: Finished difference Result 6343 states and 9546 transitions. [2021-11-12 23:02:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:02:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-12 23:02:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:11,930 INFO L225 Difference]: With dead ends: 6343 [2021-11-12 23:02:11,931 INFO L226 Difference]: Without dead ends: 3644 [2021-11-12 23:02:11,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:02:11,935 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 229 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 65 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44749.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.89ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45815.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:11,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 867 Invalid, 690 Unknown, 0 Unchecked, 4.89ms Time], IncrementalHoareTripleChecker [65 Valid, 620 Invalid, 5 Unknown, 0 Unchecked, 45815.62ms Time] [2021-11-12 23:02:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-11-12 23:02:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2917. [2021-11-12 23:02:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 1.503429355281207) internal successors, (4384), 2916 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4384 transitions. [2021-11-12 23:02:12,107 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4384 transitions. Word has length 139 [2021-11-12 23:02:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:12,107 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 4384 transitions. [2021-11-12 23:02:12,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4384 transitions. [2021-11-12 23:02:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:02:12,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:12,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:02:12,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:12,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:12,331 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1220922139, now seen corresponding path program 1 times [2021-11-12 23:02:12,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:12,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566782282] [2021-11-12 23:02:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:12,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:12,335 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:12,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:02:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:02:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:13,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:13,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:13,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:13,338 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:02:13,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:02:13,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:13,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:13,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:13,838 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:02:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:02:15,816 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:02:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:02:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:02:16,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:02:16,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:16,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566782282] [2021-11-12 23:02:16,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566782282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:16,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:16,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:02:16,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886773283] [2021-11-12 23:02:16,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:16,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:02:16,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:02:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:02:16,619 INFO L87 Difference]: Start difference. First operand 2917 states and 4384 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:18,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:28,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:32,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:38,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:44,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:46,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:48,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:48,422 INFO L93 Difference]: Finished difference Result 6448 states and 9637 transitions. [2021-11-12 23:02:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:02:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 140 [2021-11-12 23:02:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:48,434 INFO L225 Difference]: With dead ends: 6448 [2021-11-12 23:02:48,434 INFO L226 Difference]: Without dead ends: 3572 [2021-11-12 23:02:48,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:02:48,438 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 293 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30716.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31519.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:48,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 588 Invalid, 489 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [75 Valid, 412 Invalid, 2 Unknown, 0 Unchecked, 31519.22ms Time] [2021-11-12 23:02:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-11-12 23:02:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2917. [2021-11-12 23:02:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 1.4897119341563787) internal successors, (4344), 2916 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4344 transitions. [2021-11-12 23:02:48,623 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4344 transitions. Word has length 140 [2021-11-12 23:02:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:48,623 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 4344 transitions. [2021-11-12 23:02:48,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4344 transitions. [2021-11-12 23:02:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:02:48,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:48,627 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:02:48,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:48,831 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:48,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1419160250, now seen corresponding path program 1 times [2021-11-12 23:02:48,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:48,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996587238] [2021-11-12 23:02:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:48,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:48,836 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:48,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:02:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:02:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:49,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:49,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:49,720 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:02:49,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:02:49,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:49,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:49,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:50,190 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:02:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:02:51,914 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:02:51,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:02:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:02:52,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:02:52,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:52,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996587238] [2021-11-12 23:02:52,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996587238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:52,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:52,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:02:52,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900443571] [2021-11-12 23:02:52,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:52,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:02:52,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:02:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:02:52,781 INFO L87 Difference]: Start difference. First operand 2917 states and 4344 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:54,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:07,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:09,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:10,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:13,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:15,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:16,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:20,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:21,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:24,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:25,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:31,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:33,881 INFO L93 Difference]: Finished difference Result 6685 states and 9908 transitions. [2021-11-12 23:03:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:03:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 143 [2021-11-12 23:03:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:33,892 INFO L225 Difference]: With dead ends: 6685 [2021-11-12 23:03:33,892 INFO L226 Difference]: Without dead ends: 3809 [2021-11-12 23:03:33,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:33,896 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 274 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39833.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40798.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:33,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 666 Invalid, 571 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [72 Valid, 497 Invalid, 2 Unknown, 0 Unchecked, 40798.82ms Time] [2021-11-12 23:03:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2021-11-12 23:03:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 3082. [2021-11-12 23:03:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3081 states have (on average 1.4758195391106783) internal successors, (4547), 3081 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4547 transitions. [2021-11-12 23:03:34,040 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4547 transitions. Word has length 143 [2021-11-12 23:03:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:34,040 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 4547 transitions. [2021-11-12 23:03:34,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4547 transitions. [2021-11-12 23:03:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:03:34,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:34,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:03:34,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:34,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:34,246 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash 553043768, now seen corresponding path program 1 times [2021-11-12 23:03:34,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:34,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109651831] [2021-11-12 23:03:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:34,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:34,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:34,249 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:03:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:03:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:34,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:35,076 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:03:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:03:35,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:35,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:35,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:35,545 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:03:35,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:03:37,342 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:03:37,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:03:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:03:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:03:38,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:38,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109651831] [2021-11-12 23:03:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109651831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:38,176 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:03:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978724581] [2021-11-12 23:03:38,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:38,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:03:38,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:03:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:03:38,178 INFO L87 Difference]: Start difference. First operand 3082 states and 4547 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:40,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:42,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:51,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:56,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:58,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:00,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:02,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:05,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:10,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:12,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:14,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:18,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:19,143 INFO L93 Difference]: Finished difference Result 6730 states and 9885 transitions. [2021-11-12 23:04:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 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 144 [2021-11-12 23:04:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:19,155 INFO L225 Difference]: With dead ends: 6730 [2021-11-12 23:04:19,155 INFO L226 Difference]: Without dead ends: 3689 [2021-11-12 23:04:19,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:04:19,174 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 252 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39555.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.80ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40625.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:19,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 764 Invalid, 685 Unknown, 0 Unchecked, 4.80ms Time], IncrementalHoareTripleChecker [73 Valid, 609 Invalid, 3 Unknown, 0 Unchecked, 40625.09ms Time] [2021-11-12 23:04:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2021-11-12 23:04:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 3082. [2021-11-12 23:04:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3081 states have (on average 1.4608893216488152) internal successors, (4501), 3081 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4501 transitions. [2021-11-12 23:04:19,408 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4501 transitions. Word has length 144 [2021-11-12 23:04:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 4501 transitions. [2021-11-12 23:04:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4501 transitions. [2021-11-12 23:04:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:04:19,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:19,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:04:19,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:19,637 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1435092673, now seen corresponding path program 1 times [2021-11-12 23:04:19,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:19,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288586961] [2021-11-12 23:04:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:19,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:19,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:19,640 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:19,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:04:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:20,478 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:04:20,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:04:20,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:20,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:20,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:20,954 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:04:20,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:04:22,402 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:04:22,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:04:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:04:22,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:04:23,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:23,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288586961] [2021-11-12 23:04:23,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288586961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:23,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:23,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:04:23,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915085935] [2021-11-12 23:04:23,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:23,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:23,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:23,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:23,351 INFO L87 Difference]: Start difference. First operand 3082 states and 4501 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:34,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:38,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:40,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:41,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:50,764 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:52,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:54,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:55,147 INFO L93 Difference]: Finished difference Result 6967 states and 10138 transitions. [2021-11-12 23:04:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 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 149 [2021-11-12 23:04:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:55,156 INFO L225 Difference]: With dead ends: 6967 [2021-11-12 23:04:55,157 INFO L226 Difference]: Without dead ends: 3926 [2021-11-12 23:04:55,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:04:55,160 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 281 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30654.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31493.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:55,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 695 Invalid, 598 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [68 Valid, 528 Invalid, 2 Unknown, 0 Unchecked, 31493.44ms Time] [2021-11-12 23:04:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-11-12 23:04:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3223. [2021-11-12 23:04:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3222 states have (on average 1.4432029795158288) internal successors, (4650), 3222 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4650 transitions. [2021-11-12 23:04:55,337 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4650 transitions. Word has length 149 [2021-11-12 23:04:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:55,337 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 4650 transitions. [2021-11-12 23:04:55,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4650 transitions. [2021-11-12 23:04:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:04:55,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:55,342 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:04:55,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:55,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:55,551 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2058374275, now seen corresponding path program 1 times [2021-11-12 23:04:55,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:55,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776088559] [2021-11-12 23:04:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:55,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:55,553 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:55,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:04:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:56,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:56,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:56,567 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:04:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:04:57,920 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:04:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:04:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:04:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:04:58,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:58,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776088559] [2021-11-12 23:04:58,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776088559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:58,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:58,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:04:58,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945973713] [2021-11-12 23:04:58,493 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:58,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:04:58,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:04:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:58,494 INFO L87 Difference]: Start difference. First operand 3223 states and 4650 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:00,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:06,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:08,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:10,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:10,110 INFO L93 Difference]: Finished difference Result 6642 states and 9587 transitions. [2021-11-12 23:05:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:05:10,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 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 149 [2021-11-12 23:05:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:10,117 INFO L225 Difference]: With dead ends: 6642 [2021-11-12 23:05:10,117 INFO L226 Difference]: Without dead ends: 3460 [2021-11-12 23:05:10,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:05:10,120 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 58 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11117.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11420.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:10,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 603 Invalid, 175 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 1 Unknown, 0 Unchecked, 11420.23ms Time] [2021-11-12 23:05:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-12 23:05:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3376. [2021-11-12 23:05:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 1.4408888888888889) internal successors, (4863), 3375 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 4863 transitions. [2021-11-12 23:05:10,303 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 4863 transitions. Word has length 149 [2021-11-12 23:05:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 4863 transitions. [2021-11-12 23:05:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 4863 transitions. [2021-11-12 23:05:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:05:10,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:10,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:05:10,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:10,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:10,528 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash -103201469, now seen corresponding path program 1 times [2021-11-12 23:05:10,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:10,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109289780] [2021-11-12 23:05:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:10,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:10,530 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:05:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:05:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:11,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:11,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:11,321 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:05:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:05:11,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:11,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:11,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:11,704 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:05:11,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:05:13,696 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:05:13,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:05:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:05:13,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:05:14,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:14,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109289780] [2021-11-12 23:05:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109289780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:14,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:14,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:05:14,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074415581] [2021-11-12 23:05:14,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:14,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:05:14,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:05:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:05:14,454 INFO L87 Difference]: Start difference. First operand 3376 states and 4863 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:16,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:26,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:29,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:30,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:35,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:37,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:37,841 INFO L93 Difference]: Finished difference Result 7555 states and 10850 transitions. [2021-11-12 23:05:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:05:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 151 [2021-11-12 23:05:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:37,845 INFO L225 Difference]: With dead ends: 7555 [2021-11-12 23:05:37,846 INFO L226 Difference]: Without dead ends: 4220 [2021-11-12 23:05:37,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:05:37,860 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 283 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22494.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23105.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:37,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 513 Invalid, 478 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [73 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 23105.24ms Time] [2021-11-12 23:05:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-11-12 23:05:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3583. [2021-11-12 23:05:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.4338358458961473) internal successors, (5136), 3582 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 5136 transitions. [2021-11-12 23:05:38,122 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 5136 transitions. Word has length 151 [2021-11-12 23:05:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:38,123 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 5136 transitions. [2021-11-12 23:05:38,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 5136 transitions. [2021-11-12 23:05:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:05:38,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:38,142 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:05:38,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:38,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:38,343 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1743355494, now seen corresponding path program 1 times [2021-11-12 23:05:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:38,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989850404] [2021-11-12 23:05:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:38,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:38,345 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:38,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:05:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:05:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:39,070 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:05:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:05:39,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:39,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:39,460 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:05:39,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:05:41,429 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:05:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:05:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:05:41,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:05:42,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:42,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989850404] [2021-11-12 23:05:42,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989850404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:42,143 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:42,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:05:42,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316159456] [2021-11-12 23:05:42,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:05:42,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:05:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:05:42,144 INFO L87 Difference]: Start difference. First operand 3583 states and 5136 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:44,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:55,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:57,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:00,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:05,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:06,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:08,053 INFO L93 Difference]: Finished difference Result 7714 states and 11041 transitions. [2021-11-12 23:06:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 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 152 [2021-11-12 23:06:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:08,058 INFO L225 Difference]: With dead ends: 7714 [2021-11-12 23:06:08,058 INFO L226 Difference]: Without dead ends: 4172 [2021-11-12 23:06:08,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:06:08,060 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 268 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24898.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25635.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:08,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 660 Invalid, 599 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [75 Valid, 523 Invalid, 1 Unknown, 0 Unchecked, 25635.92ms Time] [2021-11-12 23:06:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-11-12 23:06:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3583. [2021-11-12 23:06:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.4271356783919598) internal successors, (5112), 3582 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 5112 transitions. [2021-11-12 23:06:08,277 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 5112 transitions. Word has length 152 [2021-11-12 23:06:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:08,277 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 5112 transitions. [2021-11-12 23:06:08,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 5112 transitions. [2021-11-12 23:06:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:06:08,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:08,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-12 23:06:08,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:08,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:08,500 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -235993878, now seen corresponding path program 1 times [2021-11-12 23:06:08,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:08,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106904865] [2021-11-12 23:06:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:08,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:08,503 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:08,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:06:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:06:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:09,232 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:06:09,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:06:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:09,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:09,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:09,663 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:06:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:06:10,953 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:06:10,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:06:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:06:11,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:06:11,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:11,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106904865] [2021-11-12 23:06:11,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106904865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:11,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:11,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:06:11,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562479151] [2021-11-12 23:06:11,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:11,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:06:11,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:06:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:11,649 INFO L87 Difference]: Start difference. First operand 3583 states and 5112 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:13,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:26,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:28,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:30,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:32,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:34,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:38,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:40,373 INFO L93 Difference]: Finished difference Result 7714 states and 10993 transitions. [2021-11-12 23:06:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-12 23:06:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:40,379 INFO L225 Difference]: With dead ends: 7714 [2021-11-12 23:06:40,379 INFO L226 Difference]: Without dead ends: 4172 [2021-11-12 23:06:40,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:06:40,383 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 240 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27714.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.49ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28424.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:40,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 621 Invalid, 568 Unknown, 0 Unchecked, 3.49ms Time], IncrementalHoareTripleChecker [69 Valid, 497 Invalid, 2 Unknown, 0 Unchecked, 28424.45ms Time] [2021-11-12 23:06:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-11-12 23:06:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3583. [2021-11-12 23:06:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.4109436069235064) internal successors, (5054), 3582 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 5054 transitions. [2021-11-12 23:06:40,565 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 5054 transitions. Word has length 155 [2021-11-12 23:06:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:40,565 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 5054 transitions. [2021-11-12 23:06:40,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 5054 transitions. [2021-11-12 23:06:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:06:40,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:40,570 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-12 23:06:40,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 23:06:40,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:40,787 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1855195400, now seen corresponding path program 1 times [2021-11-12 23:06:40,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:40,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925725939] [2021-11-12 23:06:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:40,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:40,789 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:40,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5ff18b-1327-4763-8926-199c7896d839/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:06:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:41,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:06:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:41,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:41,627 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:06:41,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:06:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:41,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:41,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:06:42,048 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:06:42,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:06:43,366 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:06:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:06:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:06:43,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:06:44,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:44,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925725939] [2021-11-12 23:06:44,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925725939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:44,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:44,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:06:44,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92065699] [2021-11-12 23:06:44,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:44,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:06:44,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:06:44,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:44,099 INFO L87 Difference]: Start difference. First operand 3583 states and 5054 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:46,148 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:48,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:56,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []