./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product32.cil.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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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 23422b93e8eb894b39d133f7e6eb45372f0db0df72df3fa3f3890b8e90f2fd0e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:56,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:56,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:56,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:56,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:56,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:56,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:56,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:56,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:56,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:56,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:56,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:56,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:56,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:56,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:56,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:56,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:56,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:56,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:56,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:56,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:56,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:56,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:56,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:56,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:56,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:56,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:56,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:56,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:56,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:56,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:56,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:56,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:56,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:56,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:56,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:56,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:56,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:56,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:56,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:56,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:56,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:56,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:56,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:56,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:56,516 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:56,516 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:56,516 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:56,517 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:56,517 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:56,518 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:56,518 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:56,518 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:56,519 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:56,519 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:56,520 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:56,520 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:56,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:56,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:56,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:56,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:56,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:56,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:56,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:56,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:56,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:56,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:56,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:56,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:56,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:56,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:56,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:56,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:56,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:56,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:56,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:56,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:56,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:56,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:56,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:56,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:56,536 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23422b93e8eb894b39d133f7e6eb45372f0db0df72df3fa3f3890b8e90f2fd0e [2021-11-07 01:43:56,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:56,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:56,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:56,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:56,842 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:56,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product32.cil.c [2021-11-07 01:43:56,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/494e27528/5fa4734f89ca4cd0a9ecc0a68dba44d1/FLAG1f51c5155 [2021-11-07 01:43:57,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:57,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c [2021-11-07 01:43:57,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/494e27528/5fa4734f89ca4cd0a9ecc0a68dba44d1/FLAG1f51c5155 [2021-11-07 01:43:57,748 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/494e27528/5fa4734f89ca4cd0a9ecc0a68dba44d1 [2021-11-07 01:43:57,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:57,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:57,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:57,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:57,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:57,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:57" (1/1) ... [2021-11-07 01:43:57,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d68baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:57, skipping insertion in model container [2021-11-07 01:43:57,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:57" (1/1) ... [2021-11-07 01:43:57,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:57,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:58,499 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c[65472,65485] [2021-11-07 01:43:58,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:58,516 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 01:43:58,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c89546f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:58, skipping insertion in model container [2021-11-07 01:43:58,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:58,517 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:43:58,520 INFO L168 Benchmark]: Toolchain (without parser) took 766.03 ms. Allocated memory is still 117.4 MB. Free memory was 77.3 MB in the beginning and 78.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:43:58,521 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory was 96.4 MB in the beginning and 96.3 MB in the end (delta: 62.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:43:58,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 763.42 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 78.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:43:58,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory was 96.4 MB in the beginning and 96.3 MB in the end (delta: 62.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 763.42 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 78.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1231]: 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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 23422b93e8eb894b39d133f7e6eb45372f0db0df72df3fa3f3890b8e90f2fd0e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:00,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:00,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:00,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:00,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:00,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:00,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:00,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:00,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:00,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:00,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:00,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:00,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:00,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:00,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:00,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:00,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:00,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:00,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:00,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:00,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:00,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:00,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:00,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:00,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:00,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:00,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:00,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:00,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:00,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:00,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:00,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:00,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:00,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:00,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:00,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:00,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:00,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:00,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:00,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:00,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:00,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:01,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:01,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:01,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:01,038 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:01,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:01,039 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:01,039 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:01,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:01,039 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:01,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:01,042 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:01,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:01,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:01,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:01,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:01,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:01,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:01,044 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:01,044 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:01,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:01,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:01,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:01,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:01,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:01,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:01,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:01,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:01,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:01,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:01,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:01,046 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:01,047 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:01,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:01,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:01,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:01,048 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23422b93e8eb894b39d133f7e6eb45372f0db0df72df3fa3f3890b8e90f2fd0e [2021-11-07 01:44:01,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:01,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:01,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:01,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:01,435 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:01,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product32.cil.c [2021-11-07 01:44:01,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/32161cd74/1ff451594a584b0ea1098cccca0e8189/FLAG8042c7192 [2021-11-07 01:44:02,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:02,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c [2021-11-07 01:44:02,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/32161cd74/1ff451594a584b0ea1098cccca0e8189/FLAG8042c7192 [2021-11-07 01:44:02,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/data/32161cd74/1ff451594a584b0ea1098cccca0e8189 [2021-11-07 01:44:02,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:02,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:02,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:02,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:02,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:02,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:02" (1/1) ... [2021-11-07 01:44:02,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c26ef2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:02, skipping insertion in model container [2021-11-07 01:44:02,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:02" (1/1) ... [2021-11-07 01:44:02,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:02,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:03,262 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c[65472,65485] [2021-11-07 01:44:03,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:03,280 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:03,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:03,420 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c[65472,65485] [2021-11-07 01:44:03,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:03,435 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:03,559 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_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/sv-benchmarks/c/product-lines/email_spec1_product32.cil.c[65472,65485] [2021-11-07 01:44:03,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:03,612 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:03,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03 WrapperNode [2021-11-07 01:44:03,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:03,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:03,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:03,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:03,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:03,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:03,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:03,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:03,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:03,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:04,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:04,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:04,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:04,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:04,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:04,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:04,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:04,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (1/1) ... [2021-11-07 01:44:04,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:04,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:04,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:04,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:44:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:10,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:10,215 INFO L299 CfgBuilder]: Removed 681 assume(true) statements. [2021-11-07 01:44:10,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:10 BoogieIcfgContainer [2021-11-07 01:44:10,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:10,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:10,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:10,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:10,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:02" (1/3) ... [2021-11-07 01:44:10,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31eb84a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:10, skipping insertion in model container [2021-11-07 01:44:10,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:03" (2/3) ... [2021-11-07 01:44:10,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31eb84a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:10, skipping insertion in model container [2021-11-07 01:44:10,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:10" (3/3) ... [2021-11-07 01:44:10,229 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product32.cil.c [2021-11-07 01:44:10,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:10,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:44:10,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:10,293 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 01:44:10,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:44:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 1074 states, 1067 states have (on average 1.7563261480787253) internal successors, (1874), 1073 states have internal predecessors, (1874), 0 states have call successors, (0), 0 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 01:44:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:44:10,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:10,353 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, 1, 1, 1, 1] [2021-11-07 01:44:10,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 361062904, now seen corresponding path program 1 times [2021-11-07 01:44:10,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:10,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125478681] [2021-11-07 01:44:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:10,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:10,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:10,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:44:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:11,123 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 01:44:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:11,284 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 01:44:11,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:11,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125478681] [2021-11-07 01:44:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125478681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:11,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:11,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:44:11,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590802935] [2021-11-07 01:44:11,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:11,311 INFO L87 Difference]: Start difference. First operand has 1074 states, 1067 states have (on average 1.7563261480787253) internal successors, (1874), 1073 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:11,488 INFO L93 Difference]: Finished difference Result 1863 states and 3225 transitions. [2021-11-07 01:44:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:44:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:11,517 INFO L225 Difference]: With dead ends: 1863 [2021-11-07 01:44:11,517 INFO L226 Difference]: Without dead ends: 916 [2021-11-07 01:44:11,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-11-07 01:44:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2021-11-07 01:44:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 910 states have (on average 1.7527472527472527) internal successors, (1595), 915 states have internal predecessors, (1595), 0 states have call successors, (0), 0 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 01:44:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1595 transitions. [2021-11-07 01:44:11,692 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1595 transitions. Word has length 48 [2021-11-07 01:44:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1595 transitions. [2021-11-07 01:44:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1595 transitions. [2021-11-07 01:44:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:44:11,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:11,704 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, 1, 1, 1, 1, 1] [2021-11-07 01:44:11,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:11,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:11,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1867572528, now seen corresponding path program 1 times [2021-11-07 01:44:11,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:11,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6260741] [2021-11-07 01:44:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:11,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:11,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:11,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:12,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:12,533 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 01:44:12,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:12,699 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 01:44:12,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6260741] [2021-11-07 01:44:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6260741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:12,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:12,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:12,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664649837] [2021-11-07 01:44:12,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:12,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:12,710 INFO L87 Difference]: Start difference. First operand 916 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:44:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:12,952 INFO L93 Difference]: Finished difference Result 2718 states and 4737 transitions. [2021-11-07 01:44:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 49 [2021-11-07 01:44:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:12,973 INFO L225 Difference]: With dead ends: 2718 [2021-11-07 01:44:12,973 INFO L226 Difference]: Without dead ends: 1817 [2021-11-07 01:44:12,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:44:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-11-07 01:44:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 915. [2021-11-07 01:44:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 909 states have (on average 1.7491749174917492) internal successors, (1590), 914 states have internal predecessors, (1590), 0 states have call successors, (0), 0 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 01:44:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1590 transitions. [2021-11-07 01:44:13,053 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1590 transitions. Word has length 49 [2021-11-07 01:44:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:13,055 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1590 transitions. [2021-11-07 01:44:13,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:44:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1590 transitions. [2021-11-07 01:44:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:44:13,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:13,067 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:13,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:13,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -790919018, now seen corresponding path program 1 times [2021-11-07 01:44:13,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:13,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190465435] [2021-11-07 01:44:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:13,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:13,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:44:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:13,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:13,915 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 01:44:13,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:14,072 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 01:44:14,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:14,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190465435] [2021-11-07 01:44:14,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190465435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:14,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:14,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:14,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620017360] [2021-11-07 01:44:14,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:14,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:14,075 INFO L87 Difference]: Start difference. First operand 915 states and 1590 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 01:44:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:14,448 INFO L93 Difference]: Finished difference Result 3577 states and 6222 transitions. [2021-11-07 01:44:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 51 [2021-11-07 01:44:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:14,466 INFO L225 Difference]: With dead ends: 3577 [2021-11-07 01:44:14,467 INFO L226 Difference]: Without dead ends: 2680 [2021-11-07 01:44:14,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-11-07 01:44:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 914. [2021-11-07 01:44:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 908 states have (on average 1.7466960352422907) internal successors, (1586), 913 states have internal predecessors, (1586), 0 states have call successors, (0), 0 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 01:44:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1586 transitions. [2021-11-07 01:44:14,566 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1586 transitions. Word has length 51 [2021-11-07 01:44:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:14,566 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1586 transitions. [2021-11-07 01:44:14,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 01:44:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1586 transitions. [2021-11-07 01:44:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:44:14,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:14,570 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:14,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:14,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1799830569, now seen corresponding path program 1 times [2021-11-07 01:44:14,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:14,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948840147] [2021-11-07 01:44:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:14,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:14,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:14,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:15,406 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 01:44:15,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:15,573 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 01:44:15,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:15,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948840147] [2021-11-07 01:44:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948840147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:15,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:15,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:15,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029285249] [2021-11-07 01:44:15,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:15,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:15,577 INFO L87 Difference]: Start difference. First operand 914 states and 1586 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 01:44:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:15,678 INFO L93 Difference]: Finished difference Result 1825 states and 3169 transitions. [2021-11-07 01:44:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 52 [2021-11-07 01:44:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:15,685 INFO L225 Difference]: With dead ends: 1825 [2021-11-07 01:44:15,685 INFO L226 Difference]: Without dead ends: 919 [2021-11-07 01:44:15,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:44:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-11-07 01:44:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 914. [2021-11-07 01:44:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 908 states have (on average 1.7433920704845816) internal successors, (1583), 913 states have internal predecessors, (1583), 0 states have call successors, (0), 0 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 01:44:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1583 transitions. [2021-11-07 01:44:15,759 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1583 transitions. Word has length 52 [2021-11-07 01:44:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1583 transitions. [2021-11-07 01:44:15,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 01:44:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1583 transitions. [2021-11-07 01:44:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:44:15,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:15,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:15,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:15,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1589574786, now seen corresponding path program 1 times [2021-11-07 01:44:15,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:15,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10685957] [2021-11-07 01:44:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:15,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:15,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:16,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:44:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:16,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:16,599 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 01:44:16,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:16,750 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 01:44:16,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:16,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10685957] [2021-11-07 01:44:16,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10685957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:16,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:16,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983043334] [2021-11-07 01:44:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:16,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:16,754 INFO L87 Difference]: Start difference. First operand 914 states and 1583 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 01:44:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:17,141 INFO L93 Difference]: Finished difference Result 3564 states and 6198 transitions. [2021-11-07 01:44:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 53 [2021-11-07 01:44:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:17,158 INFO L225 Difference]: With dead ends: 3564 [2021-11-07 01:44:17,159 INFO L226 Difference]: Without dead ends: 2676 [2021-11-07 01:44:17,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-11-07 01:44:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 914. [2021-11-07 01:44:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 908 states have (on average 1.7400881057268722) internal successors, (1580), 913 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1580 transitions. [2021-11-07 01:44:17,248 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1580 transitions. Word has length 53 [2021-11-07 01:44:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:17,248 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1580 transitions. [2021-11-07 01:44:17,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 01:44:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1580 transitions. [2021-11-07 01:44:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:44:17,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:17,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:17,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:17,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:17,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1148447623, now seen corresponding path program 1 times [2021-11-07 01:44:17,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:17,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783727798] [2021-11-07 01:44:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:17,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:17,469 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:17,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:44:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:18,066 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 01:44:18,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:18,208 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 01:44:18,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:18,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783727798] [2021-11-07 01:44:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783727798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:18,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:18,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474491178] [2021-11-07 01:44:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:18,211 INFO L87 Difference]: Start difference. First operand 914 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:18,376 INFO L93 Difference]: Finished difference Result 2433 states and 4205 transitions. [2021-11-07 01:44:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:44:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:18,388 INFO L225 Difference]: With dead ends: 2433 [2021-11-07 01:44:18,388 INFO L226 Difference]: Without dead ends: 1802 [2021-11-07 01:44:18,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:44:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-11-07 01:44:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1171. [2021-11-07 01:44:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1165 states have (on average 1.7622317596566524) internal successors, (2053), 1170 states have internal predecessors, (2053), 0 states have call successors, (0), 0 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 01:44:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2053 transitions. [2021-11-07 01:44:18,496 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2053 transitions. Word has length 55 [2021-11-07 01:44:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:18,497 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 2053 transitions. [2021-11-07 01:44:18,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2053 transitions. [2021-11-07 01:44:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:44:18,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:18,499 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, 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 01:44:18,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:18,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1965034954, now seen corresponding path program 1 times [2021-11-07 01:44:18,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:18,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963904264] [2021-11-07 01:44:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:18,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:18,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:44:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:19,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:19,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:19,565 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 01:44:19,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963904264] [2021-11-07 01:44:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963904264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:19,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:19,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:19,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693170438] [2021-11-07 01:44:19,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:19,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:19,569 INFO L87 Difference]: Start difference. First operand 1171 states and 2053 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:44:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:19,750 INFO L93 Difference]: Finished difference Result 3094 states and 5425 transitions. [2021-11-07 01:44:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 67 [2021-11-07 01:44:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:19,764 INFO L225 Difference]: With dead ends: 3094 [2021-11-07 01:44:19,764 INFO L226 Difference]: Without dead ends: 2007 [2021-11-07 01:44:19,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:44:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-11-07 01:44:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1376. [2021-11-07 01:44:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1370 states have (on average 1.772992700729927) internal successors, (2429), 1375 states have internal predecessors, (2429), 0 states have call successors, (0), 0 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 01:44:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2429 transitions. [2021-11-07 01:44:19,905 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2429 transitions. Word has length 67 [2021-11-07 01:44:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 2429 transitions. [2021-11-07 01:44:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:44:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2429 transitions. [2021-11-07 01:44:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:44:19,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:19,910 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, 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 01:44:19,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:20,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:20,126 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 342172201, now seen corresponding path program 1 times [2021-11-07 01:44:20,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:20,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117888030] [2021-11-07 01:44:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:20,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:20,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:20,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:44:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:20,852 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 01:44:20,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:21,034 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 01:44:21,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:21,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117888030] [2021-11-07 01:44:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117888030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:21,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:21,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:21,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813602266] [2021-11-07 01:44:21,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:21,036 INFO L87 Difference]: Start difference. First operand 1376 states and 2429 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:44:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:21,265 INFO L93 Difference]: Finished difference Result 3741 states and 6618 transitions. [2021-11-07 01:44:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 68 [2021-11-07 01:44:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:21,281 INFO L225 Difference]: With dead ends: 3741 [2021-11-07 01:44:21,281 INFO L226 Difference]: Without dead ends: 2457 [2021-11-07 01:44:21,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:44:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-11-07 01:44:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1826. [2021-11-07 01:44:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1820 states have (on average 1.7895604395604396) internal successors, (3257), 1825 states have internal predecessors, (3257), 0 states have call successors, (0), 0 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 01:44:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 3257 transitions. [2021-11-07 01:44:21,439 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 3257 transitions. Word has length 68 [2021-11-07 01:44:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:21,440 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 3257 transitions. [2021-11-07 01:44:21,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:44:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 3257 transitions. [2021-11-07 01:44:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:44:21,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:21,443 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, 1, 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 01:44:21,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:21,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:21,661 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1615138056, now seen corresponding path program 1 times [2021-11-07 01:44:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:21,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748530307] [2021-11-07 01:44:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:21,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:21,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:21,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:44:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:22,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:22,379 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 01:44:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:22,538 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 01:44:22,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:22,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748530307] [2021-11-07 01:44:22,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748530307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:22,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:22,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:22,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293520130] [2021-11-07 01:44:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:22,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:22,541 INFO L87 Difference]: Start difference. First operand 1826 states and 3257 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:22,780 INFO L93 Difference]: Finished difference Result 5071 states and 9071 transitions. [2021-11-07 01:44:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:44:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:22,804 INFO L225 Difference]: With dead ends: 5071 [2021-11-07 01:44:22,804 INFO L226 Difference]: Without dead ends: 3345 [2021-11-07 01:44:22,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:44:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-11-07 01:44:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2714. [2021-11-07 01:44:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2708 states have (on average 1.8064992614475628) internal successors, (4892), 2713 states have internal predecessors, (4892), 0 states have call successors, (0), 0 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 01:44:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 4892 transitions. [2021-11-07 01:44:23,069 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 4892 transitions. Word has length 69 [2021-11-07 01:44:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:23,070 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 4892 transitions. [2021-11-07 01:44:23,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 4892 transitions. [2021-11-07 01:44:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:44:23,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:23,079 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, 1, 1, 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 01:44:23,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:23,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:23,294 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash 173445240, now seen corresponding path program 1 times [2021-11-07 01:44:23,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:23,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939403464] [2021-11-07 01:44:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:23,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:23,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:23,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:44:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:24,075 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 01:44:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:24,263 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 01:44:24,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939403464] [2021-11-07 01:44:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939403464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:24,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:24,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929300401] [2021-11-07 01:44:24,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:24,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:24,265 INFO L87 Difference]: Start difference. First operand 2714 states and 4892 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:44:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:24,597 INFO L93 Difference]: Finished difference Result 7471 states and 13495 transitions. [2021-11-07 01:44:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 70 [2021-11-07 01:44:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:24,648 INFO L225 Difference]: With dead ends: 7471 [2021-11-07 01:44:24,648 INFO L226 Difference]: Without dead ends: 4891 [2021-11-07 01:44:24,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:44:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-11-07 01:44:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 4260. [2021-11-07 01:44:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 4254 states have (on average 1.818758815232722) internal successors, (7737), 4259 states have internal predecessors, (7737), 0 states have call successors, (0), 0 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 01:44:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 7737 transitions. [2021-11-07 01:44:24,949 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 7737 transitions. Word has length 70 [2021-11-07 01:44:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:24,949 INFO L470 AbstractCegarLoop]: Abstraction has 4260 states and 7737 transitions. [2021-11-07 01:44:24,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:44:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 7737 transitions. [2021-11-07 01:44:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:44:24,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:24,957 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, 1, 1, 1, 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 01:44:24,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:25,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1802271575, now seen corresponding path program 1 times [2021-11-07 01:44:25,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:25,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297510199] [2021-11-07 01:44:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:25,174 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:44:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:25,853 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 01:44:25,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:26,067 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 01:44:26,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297510199] [2021-11-07 01:44:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297510199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:26,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:26,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:26,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597136921] [2021-11-07 01:44:26,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:26,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:26,071 INFO L87 Difference]: Start difference. First operand 4260 states and 7737 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 01:44:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:26,560 INFO L93 Difference]: Finished difference Result 11825 states and 21513 transitions. [2021-11-07 01:44:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 71 [2021-11-07 01:44:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:26,583 INFO L225 Difference]: With dead ends: 11825 [2021-11-07 01:44:26,583 INFO L226 Difference]: Without dead ends: 7733 [2021-11-07 01:44:26,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:44:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2021-11-07 01:44:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 7102. [2021-11-07 01:44:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7102 states, 7096 states have (on average 1.826662908680947) internal successors, (12962), 7101 states have internal predecessors, (12962), 0 states have call successors, (0), 0 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 01:44:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7102 states to 7102 states and 12962 transitions. [2021-11-07 01:44:27,095 INFO L78 Accepts]: Start accepts. Automaton has 7102 states and 12962 transitions. Word has length 71 [2021-11-07 01:44:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:27,096 INFO L470 AbstractCegarLoop]: Abstraction has 7102 states and 12962 transitions. [2021-11-07 01:44:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 01:44:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 7102 states and 12962 transitions. [2021-11-07 01:44:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:44:27,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:27,104 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, 1, 1, 1, 1, 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 01:44:27,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,319 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1456615159, now seen corresponding path program 1 times [2021-11-07 01:44:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:27,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411125660] [2021-11-07 01:44:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:27,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:27,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:27,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:44:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:27,999 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 01:44:27,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,149 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 01:44:28,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:28,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411125660] [2021-11-07 01:44:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411125660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:28,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:28,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308011431] [2021-11-07 01:44:28,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:28,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:28,151 INFO L87 Difference]: Start difference. First operand 7102 states and 12962 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:44:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:28,768 INFO L93 Difference]: Finished difference Result 20809 states and 38030 transitions. [2021-11-07 01:44:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-07 01:44:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:28,812 INFO L225 Difference]: With dead ends: 20809 [2021-11-07 01:44:28,812 INFO L226 Difference]: Without dead ends: 13879 [2021-11-07 01:44:28,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:44:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13879 states. [2021-11-07 01:44:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13879 to 13248. [2021-11-07 01:44:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 13242 states have (on average 1.8307657453556865) internal successors, (24243), 13247 states have internal predecessors, (24243), 0 states have call successors, (0), 0 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 01:44:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 24243 transitions. [2021-11-07 01:44:29,645 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 24243 transitions. Word has length 72 [2021-11-07 01:44:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 24243 transitions. [2021-11-07 01:44:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:44:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 24243 transitions. [2021-11-07 01:44:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:44:29,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:29,656 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:29,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:29,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,870 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1650944793, now seen corresponding path program 1 times [2021-11-07 01:44:29,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:29,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339051002] [2021-11-07 01:44:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:29,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:29,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:29,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:44:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:30,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:30,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:30,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339051002] [2021-11-07 01:44:30,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339051002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:30,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145992366] [2021-11-07 01:44:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:30,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:30,884 INFO L87 Difference]: Start difference. First operand 13248 states and 24243 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 01:44:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:34,092 INFO L93 Difference]: Finished difference Result 32913 states and 60220 transitions. [2021-11-07 01:44:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:44:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:34,148 INFO L225 Difference]: With dead ends: 32913 [2021-11-07 01:44:34,148 INFO L226 Difference]: Without dead ends: 19958 [2021-11-07 01:44:34,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19958 states. [2021-11-07 01:44:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19958 to 13215. [2021-11-07 01:44:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13209 states have (on average 1.8253463547581195) internal successors, (24111), 13214 states have internal predecessors, (24111), 0 states have call successors, (0), 0 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 01:44:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 24111 transitions. [2021-11-07 01:44:34,931 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 24111 transitions. Word has length 73 [2021-11-07 01:44:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:34,932 INFO L470 AbstractCegarLoop]: Abstraction has 13215 states and 24111 transitions. [2021-11-07 01:44:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 01:44:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 24111 transitions. [2021-11-07 01:44:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:44:34,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:34,941 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, 1, 1, 1, 1, 1, 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 01:44:34,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:35,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,156 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash -530922472, now seen corresponding path program 1 times [2021-11-07 01:44:35,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:35,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351542955] [2021-11-07 01:44:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:35,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:35,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:35,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:44:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:36,012 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 01:44:36,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:36,166 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 01:44:36,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:36,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351542955] [2021-11-07 01:44:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351542955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:36,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:36,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:36,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439204777] [2021-11-07 01:44:36,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:36,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:36,168 INFO L87 Difference]: Start difference. First operand 13215 states and 24111 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 01:44:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:37,107 INFO L93 Difference]: Finished difference Result 38852 states and 70960 transitions. [2021-11-07 01:44:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2021-11-07 01:44:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:37,170 INFO L225 Difference]: With dead ends: 38852 [2021-11-07 01:44:37,171 INFO L226 Difference]: Without dead ends: 25816 [2021-11-07 01:44:37,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 01:44:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25816 states. [2021-11-07 01:44:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25816 to 25185. [2021-11-07 01:44:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25185 states, 25179 states have (on average 1.8269192581119187) internal successors, (46000), 25184 states have internal predecessors, (46000), 0 states have call successors, (0), 0 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 01:44:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25185 states to 25185 states and 46000 transitions. [2021-11-07 01:44:38,359 INFO L78 Accepts]: Start accepts. Automaton has 25185 states and 46000 transitions. Word has length 73 [2021-11-07 01:44:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 25185 states and 46000 transitions. [2021-11-07 01:44:38,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 01:44:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25185 states and 46000 transitions. [2021-11-07 01:44:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:44:38,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:38,372 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, 1, 1, 1, 1, 1, 1, 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 01:44:38,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:44:38,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:38,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1230235595, now seen corresponding path program 1 times [2021-11-07 01:44:38,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:38,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527362445] [2021-11-07 01:44:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:38,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:38,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:38,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:44:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:39,463 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 01:44:39,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:39,648 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 01:44:39,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:39,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527362445] [2021-11-07 01:44:39,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527362445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:39,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:39,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:39,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078679619] [2021-11-07 01:44:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:39,650 INFO L87 Difference]: Start difference. First operand 25185 states and 46000 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 01:44:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:41,511 INFO L93 Difference]: Finished difference Result 69401 states and 126363 transitions. [2021-11-07 01:44:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 74 [2021-11-07 01:44:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:41,585 INFO L225 Difference]: With dead ends: 69401 [2021-11-07 01:44:41,585 INFO L226 Difference]: Without dead ends: 44442 [2021-11-07 01:44:41,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:44:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44442 states. [2021-11-07 01:44:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44442 to 43811. [2021-11-07 01:44:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43811 states, 43805 states have (on average 1.8157059696381692) internal successors, (79537), 43810 states have internal predecessors, (79537), 0 states have call successors, (0), 0 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 01:44:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43811 states to 43811 states and 79537 transitions. [2021-11-07 01:44:43,930 INFO L78 Accepts]: Start accepts. Automaton has 43811 states and 79537 transitions. Word has length 74 [2021-11-07 01:44:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:43,930 INFO L470 AbstractCegarLoop]: Abstraction has 43811 states and 79537 transitions. [2021-11-07 01:44:43,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 01:44:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 43811 states and 79537 transitions. [2021-11-07 01:44:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:44:43,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:43,941 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:43,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:44:44,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1339314399, now seen corresponding path program 1 times [2021-11-07 01:44:44,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:44,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820908577] [2021-11-07 01:44:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:44,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:44,158 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:44:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:45,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:45,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:45,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820908577] [2021-11-07 01:44:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820908577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:45,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:45,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:45,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946301861] [2021-11-07 01:44:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:45,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:45,287 INFO L87 Difference]: Start difference. First operand 43811 states and 79537 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 01:44:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:52,479 INFO L93 Difference]: Finished difference Result 170524 states and 309470 transitions. [2021-11-07 01:44:52,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:44:52,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:44:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:52,710 INFO L225 Difference]: With dead ends: 170524 [2021-11-07 01:44:52,710 INFO L226 Difference]: Without dead ends: 127005 [2021-11-07 01:44:52,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127005 states. [2021-11-07 01:44:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127005 to 43553. [2021-11-07 01:44:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43553 states, 43547 states have (on average 1.8027648288056584) internal successors, (78505), 43552 states have internal predecessors, (78505), 0 states have call successors, (0), 0 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 01:44:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43553 states to 43553 states and 78505 transitions. [2021-11-07 01:44:56,133 INFO L78 Accepts]: Start accepts. Automaton has 43553 states and 78505 transitions. Word has length 75 [2021-11-07 01:44:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:56,134 INFO L470 AbstractCegarLoop]: Abstraction has 43553 states and 78505 transitions. [2021-11-07 01:44:56,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 01:44:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43553 states and 78505 transitions. [2021-11-07 01:44:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:44:56,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:56,144 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:56,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:56,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,355 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:44:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1383704189, now seen corresponding path program 1 times [2021-11-07 01:44:56,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:56,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733682265] [2021-11-07 01:44:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:56,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:56,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:44:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:57,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:57,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:57,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733682265] [2021-11-07 01:44:57,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733682265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:57,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:57,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:57,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786124221] [2021-11-07 01:44:57,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:57,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:57,411 INFO L87 Difference]: Start difference. First operand 43553 states and 78505 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 01:44:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:59,644 INFO L93 Difference]: Finished difference Result 87439 states and 157583 transitions. [2021-11-07 01:44:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:44:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:59,727 INFO L225 Difference]: With dead ends: 87439 [2021-11-07 01:44:59,727 INFO L226 Difference]: Without dead ends: 44184 [2021-11-07 01:44:59,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 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 01:44:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44184 states. [2021-11-07 01:45:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44184 to 43553. [2021-11-07 01:45:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43553 states, 43547 states have (on average 1.7998254759225665) internal successors, (78377), 43552 states have internal predecessors, (78377), 0 states have call successors, (0), 0 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 01:45:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43553 states to 43553 states and 78377 transitions. [2021-11-07 01:45:02,076 INFO L78 Accepts]: Start accepts. Automaton has 43553 states and 78377 transitions. Word has length 75 [2021-11-07 01:45:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:02,077 INFO L470 AbstractCegarLoop]: Abstraction has 43553 states and 78377 transitions. [2021-11-07 01:45:02,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 01:45:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 43553 states and 78377 transitions. [2021-11-07 01:45:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:45:02,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:02,087 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, 1, 1, 1, 1, 1, 1, 1, 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 01:45:02,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:02,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:45:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1904958570, now seen corresponding path program 1 times [2021-11-07 01:45:02,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:02,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496581138] [2021-11-07 01:45:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:02,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:02,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:02,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7a15b-1fa6-4a96-8dff-3ff28d5cab54/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:45:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:03,235 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 01:45:03,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:03,419 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 01:45:03,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:03,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496581138] [2021-11-07 01:45:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496581138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:03,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:03,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:45:03,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817560397] [2021-11-07 01:45:03,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:03,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:03,422 INFO L87 Difference]: Start difference. First operand 43553 states and 78377 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 01:45:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:06,935 INFO L93 Difference]: Finished difference Result 122169 states and 219609 transitions. [2021-11-07 01:45:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:45:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:07,085 INFO L225 Difference]: With dead ends: 122169 [2021-11-07 01:45:07,086 INFO L226 Difference]: Without dead ends: 78874 [2021-11-07 01:45:07,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:45:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78874 states.