./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8 --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-47ea020 [2021-11-07 02:02:11,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:11,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:11,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:11,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:11,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:11,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:11,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:11,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:11,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:11,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:11,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:11,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:11,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:11,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:11,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:11,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:11,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:11,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:11,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:11,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:11,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:11,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:11,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:11,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:11,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:11,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:11,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:11,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:11,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:11,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:11,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:11,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:11,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:11,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:11,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:11,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:11,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:11,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:11,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:11,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:11,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:02:11,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:11,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:11,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:11,435 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:11,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:11,435 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:11,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:02:11,436 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:11,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:11,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:02:11,437 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:02:11,437 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:11,437 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:02:11,441 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:02:11,441 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:02:11,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:11,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:11,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:11,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:11,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:11,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:11,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:11,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:11,445 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:11,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:11,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:11,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:11,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:11,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:11,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:11,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:11,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:11,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:11,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:11,448 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:02:11,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:02:11,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:11,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:11,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:11,449 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-07 02:02:11,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:11,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:11,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:11,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:11,827 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:11,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 02:02:11,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/0b407142e/f871fb99e4934d76a19d107c0a6bde6d/FLAG8e2bb37f3 [2021-11-07 02:02:12,564 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:12,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 02:02:12,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/0b407142e/f871fb99e4934d76a19d107c0a6bde6d/FLAG8e2bb37f3 [2021-11-07 02:02:12,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/0b407142e/f871fb99e4934d76a19d107c0a6bde6d [2021-11-07 02:02:12,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:12,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:12,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:12,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:12,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:12,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a297811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12, skipping insertion in model container [2021-11-07 02:02:12,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:12,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:13,338 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 02:02:13,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:13,386 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) [2021-11-07 02:02:13,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3acd0a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:13, skipping insertion in model container [2021-11-07 02:02:13,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:13,387 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:02:13,391 INFO L168 Benchmark]: Toolchain (without parser) took 609.46 ms. Allocated memory is still 86.0 MB. Free memory was 44.8 MB in the beginning and 51.7 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:13,393 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 86.0 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:02:13,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 604.82 ms. Allocated memory is still 86.0 MB. Free memory was 44.6 MB in the beginning and 51.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:13,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 86.0 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 604.82 ms. Allocated memory is still 86.0 MB. Free memory was 44.6 MB in the beginning and 51.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8 --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-47ea020 [2021-11-07 02:02:15,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:15,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:15,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:15,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:15,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:15,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:15,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:15,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:16,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:16,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:16,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:16,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:16,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:16,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:16,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:16,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:16,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:16,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:16,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:16,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:16,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:16,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:16,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:16,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:16,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:16,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:16,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:16,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:16,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:16,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:16,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:16,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:16,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:16,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:16,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:16,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:16,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:16,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:16,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:16,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:16,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:02:16,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:16,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:16,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:16,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:16,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:16,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:16,147 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:16,147 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:16,148 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:16,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:16,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:16,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:16,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:16,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:16,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:16,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:16,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:16,152 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:02:16,153 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:02:16,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:16,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:16,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:16,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:16,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:16,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:02:16,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:16,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:16,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:16,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:16,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:16,156 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:02:16,156 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:16,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:16,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:16,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:16,158 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-07 02:02:16,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:16,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:16,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:16,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:16,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:16,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 02:02:16,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/753871c6d/6dbe073367204a6484ab6b8aeede79f7/FLAGb36feb593 [2021-11-07 02:02:17,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:17,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 02:02:17,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/753871c6d/6dbe073367204a6484ab6b8aeede79f7/FLAGb36feb593 [2021-11-07 02:02:17,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/data/753871c6d/6dbe073367204a6484ab6b8aeede79f7 [2021-11-07 02:02:17,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:17,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:17,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:17,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:17,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:17,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:17" (1/1) ... [2021-11-07 02:02:17,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b6434f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:17, skipping insertion in model container [2021-11-07 02:02:17,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:17" (1/1) ... [2021-11-07 02:02:17,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:17,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:18,327 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 02:02:18,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:18,367 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:02:18,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:18,495 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 02:02:18,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:18,521 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:02:18,697 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_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 02:02:18,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:18,723 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:02:18,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18 WrapperNode [2021-11-07 02:02:18,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:18,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:18,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:02:18,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:02:18,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:18,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:02:18,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:02:18,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:02:18,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:19,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:19,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:19,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:02:19,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:02:19,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:02:19,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:02:19,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:19,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:19,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:02:19,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:02:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:02:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:02:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:02:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:02:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:02:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:02:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:02:19,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:02:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:02:19,444 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 02:02:29,036 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 02:02:29,036 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 02:02:29,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:02:29,046 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 02:02:29,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:29 BoogieIcfgContainer [2021-11-07 02:02:29,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:02:29,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:02:29,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:02:29,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:02:29,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:17" (1/3) ... [2021-11-07 02:02:29,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7507f083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:29, skipping insertion in model container [2021-11-07 02:02:29,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18" (2/3) ... [2021-11-07 02:02:29,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7507f083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:29, skipping insertion in model container [2021-11-07 02:02:29,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:29" (3/3) ... [2021-11-07 02:02:29,059 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-11-07 02:02:29,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:02:29,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:02:29,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:02:29,146 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 [2021-11-07 02:02:29,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:02:29,178 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) [2021-11-07 02:02:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:02:29,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:29,196 INFO L513 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] [2021-11-07 02:02:29,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2021-11-07 02:02:29,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:29,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534849963] [2021-11-07 02:02:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:29,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:29,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:02:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:02:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:29,813 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 [2021-11-07 02:02:29,826 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 [2021-11-07 02:02:29,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:29,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 02:02:29,996 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:30,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 02:02:30,038 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 [2021-11-07 02:02:30,602 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 02:02:30,602 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 717 treesize of output 669 [2021-11-07 02:02:30,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:30,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 02:02:30,733 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 221 treesize of output 210 [2021-11-07 02:02:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,865 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 129 treesize of output 101 [2021-11-07 02:02:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:30,904 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 [2021-11-07 02:02:31,081 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 02:02:31,081 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 [2021-11-07 02:02:31,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:31,144 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 [2021-11-07 02:02:31,203 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 [2021-11-07 02:02:31,209 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 [2021-11-07 02:02:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:31,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:31,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 02:02:31,669 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 02:02:31,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 02:02:31,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 02:02:31,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 02:02:31,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 02:02:31,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 02:02:31,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:02:31,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 02:02:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:32,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:32,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534849963] [2021-11-07 02:02:32,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534849963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:32,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:32,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:02:32,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878705627] [2021-11-07 02:02:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:32,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:32,642 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) [2021-11-07 02:02:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:50,204 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2021-11-07 02:02:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:50,207 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 [2021-11-07 02:02:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:50,218 INFO L225 Difference]: With dead ends: 311 [2021-11-07 02:02:50,218 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 02:02:50,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:02:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 02:02:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-07 02:02:50,265 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) [2021-11-07 02:02:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 219 transitions. [2021-11-07 02:02:50,268 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 219 transitions. Word has length 44 [2021-11-07 02:02:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:50,269 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 219 transitions. [2021-11-07 02:02:50,269 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) [2021-11-07 02:02:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 219 transitions. [2021-11-07 02:02:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:02:50,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:50,272 INFO L513 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] [2021-11-07 02:02:50,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:50,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:50,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1166662538, now seen corresponding path program 1 times [2021-11-07 02:02:50,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:50,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269786855] [2021-11-07 02:02:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:50,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:50,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:50,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:50,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:02:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:02:51,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:02:51,602 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:02:51,602 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 [2021-11-07 02:02:55,106 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:02:55,106 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 [2021-11-07 02:03:03,127 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:03:03,127 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 [2021-11-07 02:03:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:03,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:11,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:11,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269786855] [2021-11-07 02:03:11,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269786855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:11,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:11,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 02:03:11,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802816003] [2021-11-07 02:03:11,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:11,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 02:03:11,555 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) [2021-11-07 02:03:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:43,750 INFO L93 Difference]: Finished difference Result 302 states and 466 transitions. [2021-11-07 02:03:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:43,752 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 [2021-11-07 02:03:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:43,754 INFO L225 Difference]: With dead ends: 302 [2021-11-07 02:03:43,754 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 02:03:43,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 02:03:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 02:03:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-11-07 02:03:43,771 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) [2021-11-07 02:03:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2021-11-07 02:03:43,773 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 44 [2021-11-07 02:03:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:43,773 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2021-11-07 02:03:43,774 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) [2021-11-07 02:03:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2021-11-07 02:03:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:03:43,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:43,778 INFO L513 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] [2021-11-07 02:03:43,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:43,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:43,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:03:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash -616728635, now seen corresponding path program 1 times [2021-11-07 02:03:43,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:43,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104467560] [2021-11-07 02:03:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:43,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:43,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:43,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:43,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:03:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:44,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:44,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:03:44,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:03:45,061 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:03:45,062 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 [2021-11-07 02:03:48,427 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:03:48,428 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 [2021-11-07 02:03:55,908 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:03:55,909 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 [2021-11-07 02:03:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:56,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:56,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:56,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104467560] [2021-11-07 02:03:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104467560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:56,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:03:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953800896] [2021-11-07 02:03:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:03:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:03:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:03:56,421 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) [2021-11-07 02:04:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:40,047 INFO L93 Difference]: Finished difference Result 425 states and 659 transitions. [2021-11-07 02:04:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:40,049 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 [2021-11-07 02:04:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:40,052 INFO L225 Difference]: With dead ends: 425 [2021-11-07 02:04:40,052 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 02:04:40,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:04:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 02:04:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 169. [2021-11-07 02:04:40,071 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) [2021-11-07 02:04:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-11-07 02:04:40,073 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 57 [2021-11-07 02:04:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:40,073 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-11-07 02:04:40,074 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) [2021-11-07 02:04:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-11-07 02:04:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:04:40,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:40,077 INFO L513 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] [2021-11-07 02:04:40,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:40,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:40,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:04:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2106199760, now seen corresponding path program 1 times [2021-11-07 02:04:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:40,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802045497] [2021-11-07 02:04:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:40,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:40,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:40,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:04:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:40,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:04:40,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:04:41,401 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:04:41,401 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 [2021-11-07 02:04:44,897 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:04:44,897 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 [2021-11-07 02:04:51,743 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:04:51,743 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 [2021-11-07 02:04:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:52,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:52,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802045497] [2021-11-07 02:04:52,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802045497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:52,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:52,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:04:52,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758906403] [2021-11-07 02:04:52,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:04:52,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:04:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:04:52,298 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) [2021-11-07 02:05:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:34,871 INFO L93 Difference]: Finished difference Result 455 states and 708 transitions. [2021-11-07 02:05:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:34,872 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 [2021-11-07 02:05:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:34,874 INFO L225 Difference]: With dead ends: 455 [2021-11-07 02:05:34,874 INFO L226 Difference]: Without dead ends: 307 [2021-11-07 02:05:34,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:05:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-07 02:05:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 180. [2021-11-07 02:05:34,915 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) [2021-11-07 02:05:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 277 transitions. [2021-11-07 02:05:34,917 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 277 transitions. Word has length 58 [2021-11-07 02:05:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:34,917 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 277 transitions. [2021-11-07 02:05:34,917 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) [2021-11-07 02:05:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 277 transitions. [2021-11-07 02:05:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:05:34,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:34,921 INFO L513 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] [2021-11-07 02:05:34,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:35,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:35,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:35,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1058688956, now seen corresponding path program 1 times [2021-11-07 02:05:35,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:35,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631382976] [2021-11-07 02:05:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:35,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:35,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:05:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:35,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:05:35,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:05:36,161 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:05:36,162 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 [2021-11-07 02:05:39,383 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:05:39,383 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 [2021-11-07 02:05:46,220 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:05:46,221 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 [2021-11-07 02:05:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:46,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:46,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:46,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631382976] [2021-11-07 02:05:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631382976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:46,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:05:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232682405] [2021-11-07 02:05:46,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:05:46,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:05:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:05:46,755 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) [2021-11-07 02:06:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:21,508 INFO L93 Difference]: Finished difference Result 468 states and 722 transitions. [2021-11-07 02:06:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:21,509 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 [2021-11-07 02:06:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:21,511 INFO L225 Difference]: With dead ends: 468 [2021-11-07 02:06:21,511 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 02:06:21,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:06:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 02:06:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 193. [2021-11-07 02:06:21,521 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) [2021-11-07 02:06:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 294 transitions. [2021-11-07 02:06:21,522 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 294 transitions. Word has length 58 [2021-11-07 02:06:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:21,522 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 294 transitions. [2021-11-07 02:06:21,523 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) [2021-11-07 02:06:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 294 transitions. [2021-11-07 02:06:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:06:21,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:21,525 INFO L513 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] [2021-11-07 02:06:21,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:06:21,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:21,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash -77177339, now seen corresponding path program 1 times [2021-11-07 02:06:21,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:21,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190180068] [2021-11-07 02:06:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:21,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:21,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:06:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:22,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:06:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:06:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:06:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:06:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:06:22,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:06:22,904 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:06:22,905 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 [2021-11-07 02:06:26,207 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:06:26,208 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 [2021-11-07 02:06:33,686 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:06:33,686 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 [2021-11-07 02:06:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:34,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:34,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190180068] [2021-11-07 02:06:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190180068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:34,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:34,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:06:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611947630] [2021-11-07 02:06:34,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:06:34,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:06:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:06:34,191 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) [2021-11-07 02:07:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:18,881 INFO L93 Difference]: Finished difference Result 505 states and 775 transitions. [2021-11-07 02:07:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:18,883 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 [2021-11-07 02:07:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:18,886 INFO L225 Difference]: With dead ends: 505 [2021-11-07 02:07:18,886 INFO L226 Difference]: Without dead ends: 333 [2021-11-07 02:07:18,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:07:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-07 02:07:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 215. [2021-11-07 02:07:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.5327102803738317) internal successors, (328), 214 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 328 transitions. [2021-11-07 02:07:18,902 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 328 transitions. Word has length 58 [2021-11-07 02:07:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:18,903 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 328 transitions. [2021-11-07 02:07:18,903 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) [2021-11-07 02:07:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 328 transitions. [2021-11-07 02:07:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:07:18,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:18,907 INFO L513 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] [2021-11-07 02:07:18,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:07:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:19,122 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1243675973, now seen corresponding path program 1 times [2021-11-07 02:07:19,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:19,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165977142] [2021-11-07 02:07:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:19,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:19,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:07:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:07:20,394 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:07:20,395 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 [2021-11-07 02:07:23,893 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:07:23,893 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 [2021-11-07 02:07:31,453 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:07:31,454 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 [2021-11-07 02:07:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:31,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165977142] [2021-11-07 02:07:31,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165977142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:31,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:31,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:07:31,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476734178] [2021-11-07 02:07:31,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:07:31,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:07:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:07:31,916 INFO L87 Difference]: Start difference. First operand 215 states and 328 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) [2021-11-07 02:08:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:12,154 INFO L93 Difference]: Finished difference Result 559 states and 858 transitions. [2021-11-07 02:08:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:08:12,156 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 [2021-11-07 02:08:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:12,159 INFO L225 Difference]: With dead ends: 559 [2021-11-07 02:08:12,159 INFO L226 Difference]: Without dead ends: 365 [2021-11-07 02:08:12,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:08:12,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-07 02:08:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 248. [2021-11-07 02:08:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5263157894736843) internal successors, (377), 247 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 377 transitions. [2021-11-07 02:08:12,174 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 377 transitions. Word has length 58 [2021-11-07 02:08:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:12,175 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 377 transitions. [2021-11-07 02:08:12,175 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) [2021-11-07 02:08:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 377 transitions. [2021-11-07 02:08:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:08:12,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:12,177 INFO L513 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] [2021-11-07 02:08:12,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:12,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:12,390 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 967076732, now seen corresponding path program 1 times [2021-11-07 02:08:12,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:12,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944954279] [2021-11-07 02:08:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:12,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:12,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:12,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:08:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:13,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:08:13,623 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:08:13,623 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 [2021-11-07 02:08:16,929 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:08:16,929 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 [2021-11-07 02:08:23,969 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:08:23,970 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 [2021-11-07 02:08:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:24,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:24,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:24,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944954279] [2021-11-07 02:08:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944954279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:24,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:24,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:08:24,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656863929] [2021-11-07 02:08:24,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:24,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:08:24,427 INFO L87 Difference]: Start difference. First operand 248 states and 377 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) [2021-11-07 02:09:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:01,324 INFO L93 Difference]: Finished difference Result 583 states and 891 transitions. [2021-11-07 02:09:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:01,326 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 [2021-11-07 02:09:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:01,329 INFO L225 Difference]: With dead ends: 583 [2021-11-07 02:09:01,329 INFO L226 Difference]: Without dead ends: 356 [2021-11-07 02:09:01,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:09:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-07 02:09:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-11-07 02:09:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.5080645161290323) internal successors, (374), 248 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 374 transitions. [2021-11-07 02:09:01,345 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 374 transitions. Word has length 59 [2021-11-07 02:09:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:01,346 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 374 transitions. [2021-11-07 02:09:01,346 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) [2021-11-07 02:09:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 374 transitions. [2021-11-07 02:09:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:09:01,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:01,348 INFO L513 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] [2021-11-07 02:09:01,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:09:01,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:01,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash 800295895, now seen corresponding path program 1 times [2021-11-07 02:09:01,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:01,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305888472] [2021-11-07 02:09:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:01,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:01,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:01,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:09:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:09:02,849 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:09:02,850 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 [2021-11-07 02:09:06,182 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:09:06,182 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 [2021-11-07 02:09:13,315 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:09:13,316 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 [2021-11-07 02:09:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:13,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:13,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:13,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305888472] [2021-11-07 02:09:13,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305888472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:13,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:13,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:09:13,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936942629] [2021-11-07 02:09:13,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:09:13,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:09:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:09:13,855 INFO L87 Difference]: Start difference. First operand 249 states and 374 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) [2021-11-07 02:09:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:51,452 INFO L93 Difference]: Finished difference Result 587 states and 889 transitions. [2021-11-07 02:09:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:51,453 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 [2021-11-07 02:09:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:51,455 INFO L225 Difference]: With dead ends: 587 [2021-11-07 02:09:51,455 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 02:09:51,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:09:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 02:09:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 250. [2021-11-07 02:09:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4859437751004017) internal successors, (370), 249 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2021-11-07 02:09:51,467 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 60 [2021-11-07 02:09:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:51,468 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2021-11-07 02:09:51,468 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) [2021-11-07 02:09:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2021-11-07 02:09:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:09:51,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:51,470 INFO L513 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] [2021-11-07 02:09:51,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:51,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:51,682 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:51,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1696711945, now seen corresponding path program 1 times [2021-11-07 02:09:51,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:51,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318124860] [2021-11-07 02:09:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:51,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:51,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:51,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:09:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:52,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:09:52,961 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 02:09:52,962 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 [2021-11-07 02:09:56,138 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 02:09:56,139 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 [2021-11-07 02:10:03,227 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 02:10:03,228 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 [2021-11-07 02:10:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:03,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318124860] [2021-11-07 02:10:03,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318124860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:03,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:03,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:10:03,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884871836] [2021-11-07 02:10:03,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:10:03,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:10:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:10:03,699 INFO L87 Difference]: Start difference. First operand 250 states and 370 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) [2021-11-07 02:10:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:54,559 INFO L93 Difference]: Finished difference Result 588 states and 885 transitions. [2021-11-07 02:10:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:54,560 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 [2021-11-07 02:10:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:54,563 INFO L225 Difference]: With dead ends: 588 [2021-11-07 02:10:54,563 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 02:10:54,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 02:10:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 02:10:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 250. [2021-11-07 02:10:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.461847389558233) internal successors, (364), 249 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 364 transitions. [2021-11-07 02:10:54,575 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 364 transitions. Word has length 61 [2021-11-07 02:10:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:54,575 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 364 transitions. [2021-11-07 02:10:54,575 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) [2021-11-07 02:10:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 364 transitions. [2021-11-07 02:10:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:10:54,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:54,577 INFO L513 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] [2021-11-07 02:10:54,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:54,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:54,790 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1023713137, now seen corresponding path program 1 times [2021-11-07 02:10:54,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:54,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292279500] [2021-11-07 02:10:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:54,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:54,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:54,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:10:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:55,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:10:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:10:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:10:55,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:10:55,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:10:55,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:10:56,060 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 02:10:56,060 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 [2021-11-07 02:10:57,115 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:10:57,115 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 [2021-11-07 02:10:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:57,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:57,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292279500] [2021-11-07 02:10:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292279500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:57,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:57,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:10:57,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559492256] [2021-11-07 02:10:57,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:10:57,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:10:57,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:10:57,541 INFO L87 Difference]: Start difference. First operand 250 states and 364 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) [2021-11-07 02:11:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:13,803 INFO L93 Difference]: Finished difference Result 508 states and 745 transitions. [2021-11-07 02:11:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:13,808 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 [2021-11-07 02:11:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:13,811 INFO L225 Difference]: With dead ends: 508 [2021-11-07 02:11:13,811 INFO L226 Difference]: Without dead ends: 279 [2021-11-07 02:11:13,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:11:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-07 02:11:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2021-11-07 02:11:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.4538745387453875) internal successors, (394), 271 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 394 transitions. [2021-11-07 02:11:13,825 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 394 transitions. Word has length 61 [2021-11-07 02:11:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:13,826 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 394 transitions. [2021-11-07 02:11:13,826 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) [2021-11-07 02:11:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 394 transitions. [2021-11-07 02:11:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:11:13,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:13,828 INFO L513 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] [2021-11-07 02:11:13,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:14,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:14,042 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1369586491, now seen corresponding path program 1 times [2021-11-07 02:11:14,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:14,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157639791] [2021-11-07 02:11:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:14,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:14,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:14,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:11:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:11:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:15,207 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:11:15,207 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 [2021-11-07 02:11:15,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:15,624 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:11:15,625 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 [2021-11-07 02:11:17,811 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:11:17,812 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 [2021-11-07 02:11:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:11:17,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:11:18,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:18,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157639791] [2021-11-07 02:11:18,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157639791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:18,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:18,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:11:18,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117465265] [2021-11-07 02:11:18,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:11:18,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:11:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:11:18,246 INFO L87 Difference]: Start difference. First operand 272 states and 394 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) [2021-11-07 02:11:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:51,712 INFO L93 Difference]: Finished difference Result 762 states and 1128 transitions. [2021-11-07 02:11:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:11:51,714 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 [2021-11-07 02:11:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:51,718 INFO L225 Difference]: With dead ends: 762 [2021-11-07 02:11:51,719 INFO L226 Difference]: Without dead ends: 511 [2021-11-07 02:11:51,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:11:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-07 02:11:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 329. [2021-11-07 02:11:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.4847560975609757) internal successors, (487), 328 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 487 transitions. [2021-11-07 02:11:51,739 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 487 transitions. Word has length 83 [2021-11-07 02:11:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:51,739 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 487 transitions. [2021-11-07 02:11:51,740 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) [2021-11-07 02:11:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 487 transitions. [2021-11-07 02:11:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:11:51,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:51,742 INFO L513 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] [2021-11-07 02:11:51,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:51,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,963 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -733688034, now seen corresponding path program 1 times [2021-11-07 02:11:51,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:51,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837696246] [2021-11-07 02:11:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:51,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:51,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:51,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:11:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:11:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:11:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:53,332 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:11:53,333 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 [2021-11-07 02:11:53,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:53,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:53,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:11:53,698 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:11:53,699 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 [2021-11-07 02:11:56,147 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:11:56,147 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 [2021-11-07 02:11:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:11:56,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:11:56,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:56,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837696246] [2021-11-07 02:11:56,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837696246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:56,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:56,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:11:56,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244900743] [2021-11-07 02:11:56,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:11:56,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:11:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:11:56,628 INFO L87 Difference]: Start difference. First operand 329 states and 487 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) [2021-11-07 02:12:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:30,452 INFO L93 Difference]: Finished difference Result 852 states and 1291 transitions. [2021-11-07 02:12:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:12:30,455 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 [2021-11-07 02:12:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:30,459 INFO L225 Difference]: With dead ends: 852 [2021-11-07 02:12:30,459 INFO L226 Difference]: Without dead ends: 544 [2021-11-07 02:12:30,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-07 02:12:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 372. [2021-11-07 02:12:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.5390835579514826) internal successors, (571), 371 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 571 transitions. [2021-11-07 02:12:30,480 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 571 transitions. Word has length 84 [2021-11-07 02:12:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:30,480 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 571 transitions. [2021-11-07 02:12:30,481 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) [2021-11-07 02:12:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 571 transitions. [2021-11-07 02:12:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 02:12:30,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:30,483 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:30,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:30,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash 246396450, now seen corresponding path program 1 times [2021-11-07 02:12:30,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:30,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018909149] [2021-11-07 02:12:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:30,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:30,705 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:30,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:12:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:12:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:32,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:12:32,229 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:12:32,229 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 [2021-11-07 02:12:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:12:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:12:32,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:12:32,651 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:12:32,651 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 [2021-11-07 02:12:34,554 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:12:34,554 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 [2021-11-07 02:12:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:12:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:12:35,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:35,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018909149] [2021-11-07 02:12:35,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018909149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:35,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:35,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:12:35,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784004029] [2021-11-07 02:12:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:35,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:12:35,247 INFO L87 Difference]: Start difference. First operand 372 states and 571 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:02,147 INFO L93 Difference]: Finished difference Result 937 states and 1441 transitions. [2021-11-07 02:13:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:13:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 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 111 [2021-11-07 02:13:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:02,153 INFO L225 Difference]: With dead ends: 937 [2021-11-07 02:13:02,153 INFO L226 Difference]: Without dead ends: 586 [2021-11-07 02:13:02,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-07 02:13:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 402. [2021-11-07 02:13:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.5336658354114714) internal successors, (615), 401 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 615 transitions. [2021-11-07 02:13:02,174 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 615 transitions. Word has length 111 [2021-11-07 02:13:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 615 transitions. [2021-11-07 02:13:02,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 615 transitions. [2021-11-07 02:13:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 02:13:02,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:02,178 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:02,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:02,397 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 359824896, now seen corresponding path program 1 times [2021-11-07 02:13:02,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:02,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459877261] [2021-11-07 02:13:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:02,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:02,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:13:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:03,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:03,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:03,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:03,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:03,947 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:13:03,948 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 [2021-11-07 02:13:04,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:04,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:04,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:04,357 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:13:04,357 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 [2021-11-07 02:13:06,248 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:13:06,249 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 [2021-11-07 02:13:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:13:06,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:13:06,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:06,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459877261] [2021-11-07 02:13:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459877261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:06,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:06,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:13:06,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937307109] [2021-11-07 02:13:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:06,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:13:06,841 INFO L87 Difference]: Start difference. First operand 402 states and 615 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) [2021-11-07 02:13:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:44,842 INFO L93 Difference]: Finished difference Result 955 states and 1461 transitions. [2021-11-07 02:13:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:13:44,844 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 112 [2021-11-07 02:13:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:44,848 INFO L225 Difference]: With dead ends: 955 [2021-11-07 02:13:44,848 INFO L226 Difference]: Without dead ends: 574 [2021-11-07 02:13:44,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:13:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-07 02:13:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 402. [2021-11-07 02:13:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.5261845386533666) internal successors, (612), 401 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 612 transitions. [2021-11-07 02:13:44,867 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 612 transitions. Word has length 112 [2021-11-07 02:13:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:44,867 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 612 transitions. [2021-11-07 02:13:44,867 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) [2021-11-07 02:13:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 612 transitions. [2021-11-07 02:13:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 02:13:44,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:44,870 INFO L513 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] [2021-11-07 02:13:44,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:45,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1757322439, now seen corresponding path program 1 times [2021-11-07 02:13:45,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:45,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455643117] [2021-11-07 02:13:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:45,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:45,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:45,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:13:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:46,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:46,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:46,734 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:13:46,734 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 [2021-11-07 02:13:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:46,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:13:47,086 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:13:47,086 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 [2021-11-07 02:13:48,742 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:13:48,743 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 [2021-11-07 02:13:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:13:48,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:13:49,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:49,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455643117] [2021-11-07 02:13:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455643117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:49,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:13:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805998734] [2021-11-07 02:13:49,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:49,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:13:49,320 INFO L87 Difference]: Start difference. First operand 402 states and 612 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) [2021-11-07 02:14:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:13,458 INFO L93 Difference]: Finished difference Result 974 states and 1495 transitions. [2021-11-07 02:14:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:14:13,459 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 [2021-11-07 02:14:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:13,463 INFO L225 Difference]: With dead ends: 974 [2021-11-07 02:14:13,463 INFO L226 Difference]: Without dead ends: 593 [2021-11-07 02:14:13,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:14:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-07 02:14:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 438. [2021-11-07 02:14:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.5331807780320366) internal successors, (670), 437 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 670 transitions. [2021-11-07 02:14:13,501 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 670 transitions. Word has length 112 [2021-11-07 02:14:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:13,501 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 670 transitions. [2021-11-07 02:14:13,502 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) [2021-11-07 02:14:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 670 transitions. [2021-11-07 02:14:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 02:14:13,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:13,505 INFO L513 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] [2021-11-07 02:14:13,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:13,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:13,728 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash -515891760, now seen corresponding path program 1 times [2021-11-07 02:14:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:13,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194079018] [2021-11-07 02:14:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:13,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:13,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:13,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:14:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:15,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:15,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:14:15,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:14:15,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:15,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194079018] [2021-11-07 02:14:15,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194079018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:15,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:15,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:15,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20404583] [2021-11-07 02:14:15,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:15,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:15,848 INFO L87 Difference]: Start difference. First operand 438 states and 670 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) [2021-11-07 02:14:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:16,317 INFO L93 Difference]: Finished difference Result 1649 states and 2550 transitions. [2021-11-07 02:14:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:16,318 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 [2021-11-07 02:14:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:16,324 INFO L225 Difference]: With dead ends: 1649 [2021-11-07 02:14:16,324 INFO L226 Difference]: Without dead ends: 1232 [2021-11-07 02:14:16,325 INFO L786 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 [2021-11-07 02:14:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-11-07 02:14:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1225. [2021-11-07 02:14:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 1.536764705882353) internal successors, (1881), 1224 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1881 transitions. [2021-11-07 02:14:16,375 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1881 transitions. Word has length 118 [2021-11-07 02:14:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 1881 transitions. [2021-11-07 02:14:16,376 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) [2021-11-07 02:14:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1881 transitions. [2021-11-07 02:14:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 02:14:16,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:16,380 INFO L513 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] [2021-11-07 02:14:16,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:16,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:16,594 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1887699058, now seen corresponding path program 1 times [2021-11-07 02:14:16,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:16,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174015196] [2021-11-07 02:14:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:16,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:16,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:16,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:16,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:14:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:18,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:14:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:14:18,705 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:14:18,705 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 [2021-11-07 02:14:18,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:14:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:14:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:14:19,142 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:14:19,143 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 [2021-11-07 02:14:21,431 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:14:21,432 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 [2021-11-07 02:14:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:14:21,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:14:22,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:22,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174015196] [2021-11-07 02:14:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174015196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:22,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:22,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:14:22,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090272583] [2021-11-07 02:14:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:14:22,108 INFO L87 Difference]: Start difference. First operand 1225 states and 1881 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) [2021-11-07 02:15:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:03,774 INFO L93 Difference]: Finished difference Result 3039 states and 4628 transitions. [2021-11-07 02:15:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:15:03,776 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 [2021-11-07 02:15:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:03,789 INFO L225 Difference]: With dead ends: 3039 [2021-11-07 02:15:03,789 INFO L226 Difference]: Without dead ends: 1835 [2021-11-07 02:15:03,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:15:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-11-07 02:15:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1336. [2021-11-07 02:15:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.5325842696629213) internal successors, (2046), 1335 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2046 transitions. [2021-11-07 02:15:03,866 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2046 transitions. Word has length 118 [2021-11-07 02:15:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:03,867 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2046 transitions. [2021-11-07 02:15:03,867 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) [2021-11-07 02:15:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2046 transitions. [2021-11-07 02:15:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 02:15:03,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:03,871 INFO L513 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] [2021-11-07 02:15:03,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:04,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:04,093 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1750138219, now seen corresponding path program 1 times [2021-11-07 02:15:04,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:04,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163666116] [2021-11-07 02:15:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:04,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:04,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:04,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:15:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:06,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:06,529 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:15:06,530 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 [2021-11-07 02:15:06,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:06,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:06,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:06,919 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:15:06,920 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 [2021-11-07 02:15:09,253 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:15:09,254 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 [2021-11-07 02:15:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:15:09,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:15:09,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:09,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163666116] [2021-11-07 02:15:09,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163666116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:09,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:09,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 02:15:09,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900828915] [2021-11-07 02:15:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:15:09,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:15:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:15:09,964 INFO L87 Difference]: Start difference. First operand 1336 states and 2046 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) [2021-11-07 02:15:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:46,625 INFO L93 Difference]: Finished difference Result 3133 states and 4760 transitions. [2021-11-07 02:15:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:15:46,626 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 [2021-11-07 02:15:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:46,634 INFO L225 Difference]: With dead ends: 3133 [2021-11-07 02:15:46,634 INFO L226 Difference]: Without dead ends: 1818 [2021-11-07 02:15:46,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:15:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-11-07 02:15:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1336. [2021-11-07 02:15:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.5258426966292136) internal successors, (2037), 1335 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2037 transitions. [2021-11-07 02:15:46,718 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2037 transitions. Word has length 119 [2021-11-07 02:15:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:46,718 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2037 transitions. [2021-11-07 02:15:46,719 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) [2021-11-07 02:15:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2037 transitions. [2021-11-07 02:15:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 02:15:46,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:46,722 INFO L513 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] [2021-11-07 02:15:46,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 02:15:46,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:46,941 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2035928498, now seen corresponding path program 1 times [2021-11-07 02:15:46,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:46,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888381771] [2021-11-07 02:15:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:46,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:46,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:46,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:15:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 02:15:48,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 02:15:49,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:49,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888381771] [2021-11-07 02:15:49,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888381771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:49,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:49,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:49,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709013332] [2021-11-07 02:15:49,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:49,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:49,178 INFO L87 Difference]: Start difference. First operand 1336 states and 2037 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) [2021-11-07 02:15:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:49,431 INFO L93 Difference]: Finished difference Result 2678 states and 4087 transitions. [2021-11-07 02:15:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:49,432 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 [2021-11-07 02:15:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:49,437 INFO L225 Difference]: With dead ends: 2678 [2021-11-07 02:15:49,437 INFO L226 Difference]: Without dead ends: 1363 [2021-11-07 02:15:49,438 INFO L786 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 [2021-11-07 02:15:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-11-07 02:15:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1363. [2021-11-07 02:15:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.5212922173274597) internal successors, (2072), 1362 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2072 transitions. [2021-11-07 02:15:49,497 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2072 transitions. Word has length 126 [2021-11-07 02:15:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:49,498 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2072 transitions. [2021-11-07 02:15:49,498 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) [2021-11-07 02:15:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2072 transitions. [2021-11-07 02:15:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 02:15:49,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:49,501 INFO L513 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] [2021-11-07 02:15:49,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:49,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:49,720 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1917487024, now seen corresponding path program 1 times [2021-11-07 02:15:49,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:49,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450841917] [2021-11-07 02:15:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:49,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:49,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:49,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:15:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 02:15:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 02:15:52,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:52,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450841917] [2021-11-07 02:15:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450841917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:52,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:52,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:52,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354222587] [2021-11-07 02:15:52,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:15:52,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:15:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:52,091 INFO L87 Difference]: Start difference. First operand 1363 states and 2072 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) [2021-11-07 02:15:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:52,201 INFO L93 Difference]: Finished difference Result 2707 states and 4123 transitions. [2021-11-07 02:15:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:52,201 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 [2021-11-07 02:15:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:52,208 INFO L225 Difference]: With dead ends: 2707 [2021-11-07 02:15:52,208 INFO L226 Difference]: Without dead ends: 1365 [2021-11-07 02:15:52,209 INFO L786 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 [2021-11-07 02:15:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-11-07 02:15:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1365. [2021-11-07 02:15:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.5205278592375366) internal successors, (2074), 1364 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2074 transitions. [2021-11-07 02:15:52,284 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2074 transitions. Word has length 126 [2021-11-07 02:15:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:52,284 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 2074 transitions. [2021-11-07 02:15:52,284 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) [2021-11-07 02:15:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2074 transitions. [2021-11-07 02:15:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 02:15:52,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:52,288 INFO L513 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] [2021-11-07 02:15:52,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:52,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:52,514 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:52,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash -485141759, now seen corresponding path program 1 times [2021-11-07 02:15:52,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:52,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504491971] [2021-11-07 02:15:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:52,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:52,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:52,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c5fb02-9de7-49d8-890d-9a57dc6abf7b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:15:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:54,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:55,001 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 02:15:55,002 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 [2021-11-07 02:15:55,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:55,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:55,571 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 02:15:55,571 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 [2021-11-07 02:15:58,257 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 02:15:58,257 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 [2021-11-07 02:15:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:15:58,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 02:15:59,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:59,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504491971] [2021-11-07 02:15:59,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504491971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:59,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:59,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-07 02:15:59,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629958905] [2021-11-07 02:15:59,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:15:59,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:15:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:15:59,752 INFO L87 Difference]: Start difference. First operand 1365 states and 2074 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)