./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product29.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_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/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_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/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_758d610e-1d4a-43ec-b417-860fb2f5011e/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 e2402328b10acba07d45e1b6bd18216e1645c73446d4739f1dc37852ed64162e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:51:20,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:51:20,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:51:20,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:51:20,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:51:20,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:51:20,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:51:20,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:51:20,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:51:20,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:51:20,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:51:20,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:51:20,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:51:20,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:51:20,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:51:20,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:51:20,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:51:20,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:51:20,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:51:20,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:51:20,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:51:20,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:51:20,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:51:20,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:51:20,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:51:20,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:51:20,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:51:20,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:51:20,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:51:20,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:51:20,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:51:20,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:51:20,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:51:20,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:51:20,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:51:20,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:51:20,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:51:20,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:51:20,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:51:20,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:51:20,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:51:20,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:51:20,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:51:20,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:51:20,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:51:20,537 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:51:20,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:51:20,538 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:51:20,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:51:20,538 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:51:20,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:51:20,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:51:20,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:51:20,539 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:51:20,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:51:20,540 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:51:20,540 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:51:20,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:51:20,541 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:51:20,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:51:20,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:51:20,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:51:20,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:51:20,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:51:20,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:51:20,543 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:51:20,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:51:20,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:51:20,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:51:20,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:51:20,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:51:20,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:51:20,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:20,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:51:20,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:51:20,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:51:20,546 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:51:20,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:51:20,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:51:20,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:51:20,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:51:20,547 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_758d610e-1d4a-43ec-b417-860fb2f5011e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2402328b10acba07d45e1b6bd18216e1645c73446d4739f1dc37852ed64162e [2021-11-07 01:51:20,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:51:20,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:51:20,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:51:20,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:51:20,897 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:51:20,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product29.cil.c [2021-11-07 01:51:20,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/a56d0cf2d/f72cbba73b2449efa4a540f44b1c73a0/FLAG41b45835d [2021-11-07 01:51:21,595 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:51:21,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c [2021-11-07 01:51:21,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/a56d0cf2d/f72cbba73b2449efa4a540f44b1c73a0/FLAG41b45835d [2021-11-07 01:51:21,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/a56d0cf2d/f72cbba73b2449efa4a540f44b1c73a0 [2021-11-07 01:51:21,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:51:21,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:51:21,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:21,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:51:21,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:51:21,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:21" (1/1) ... [2021-11-07 01:51:21,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5389a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:21, skipping insertion in model container [2021-11-07 01:51:21,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:21" (1/1) ... [2021-11-07 01:51:21,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:51:21,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:22,640 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_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c[65089,65102] [2021-11-07 01:51:22,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:22,656 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 01:51:22,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@427d7d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:22, skipping insertion in model container [2021-11-07 01:51:22,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:22,657 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:51:22,659 INFO L168 Benchmark]: Toolchain (without parser) took 839.44 ms. Allocated memory is still 127.9 MB. Free memory was 82.8 MB in the beginning and 87.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:22,660 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 127.9 MB. Free memory is still 101.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:51:22,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 836.13 ms. Allocated memory is still 127.9 MB. Free memory was 82.7 MB in the beginning and 87.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:22,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 127.9 MB. Free memory is still 101.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 836.13 ms. Allocated memory is still 127.9 MB. Free memory was 82.7 MB in the beginning and 87.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 720]: 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_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/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_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/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_758d610e-1d4a-43ec-b417-860fb2f5011e/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 e2402328b10acba07d45e1b6bd18216e1645c73446d4739f1dc37852ed64162e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:51:25,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:51:25,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:51:25,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:51:25,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:51:25,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:51:25,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:51:25,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:51:25,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:51:25,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:51:25,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:51:25,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:51:25,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:51:25,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:51:25,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:51:25,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:51:25,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:51:25,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:51:25,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:51:25,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:51:25,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:51:25,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:51:25,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:51:25,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:51:25,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:51:25,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:51:25,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:51:25,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:51:25,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:51:25,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:51:25,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:51:25,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:51:25,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:51:25,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:51:25,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:51:25,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:51:25,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:51:25,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:51:25,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:51:25,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:51:25,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:51:25,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:51:25,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:51:25,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:51:25,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:51:25,432 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:51:25,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:51:25,432 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:51:25,432 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:51:25,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:51:25,433 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:51:25,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:51:25,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:51:25,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:51:25,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:51:25,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:51:25,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:51:25,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:51:25,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:51:25,438 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:51:25,438 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:51:25,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:51:25,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:51:25,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:51:25,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:51:25,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:51:25,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:51:25,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:51:25,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:25,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:51:25,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:51:25,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:51:25,442 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:51:25,442 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:25,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:51:25,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:51:25,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:51:25,444 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_758d610e-1d4a-43ec-b417-860fb2f5011e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2402328b10acba07d45e1b6bd18216e1645c73446d4739f1dc37852ed64162e [2021-11-07 01:51:25,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:51:25,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:51:25,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:51:25,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:51:25,934 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:51:25,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product29.cil.c [2021-11-07 01:51:26,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/76e7b8ae4/56cb6305d1e449edbde7736700e3eaea/FLAG7120596cc [2021-11-07 01:51:26,870 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:51:26,870 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c [2021-11-07 01:51:26,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/76e7b8ae4/56cb6305d1e449edbde7736700e3eaea/FLAG7120596cc [2021-11-07 01:51:27,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/data/76e7b8ae4/56cb6305d1e449edbde7736700e3eaea [2021-11-07 01:51:27,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:51:27,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:51:27,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:27,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:51:27,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:51:27,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:27" (1/1) ... [2021-11-07 01:51:27,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4dbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:27, skipping insertion in model container [2021-11-07 01:51:27,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:51:27" (1/1) ... [2021-11-07 01:51:27,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:51:27,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:27,780 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_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c[65089,65102] [2021-11-07 01:51:27,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:27,834 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:51:27,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:51:28,033 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_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c[65089,65102] [2021-11-07 01:51:28,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:28,044 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:51:28,178 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_758d610e-1d4a-43ec-b417-860fb2f5011e/sv-benchmarks/c/product-lines/email_spec9_product29.cil.c[65089,65102] [2021-11-07 01:51:28,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:51:28,221 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:51:28,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28 WrapperNode [2021-11-07 01:51:28,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:51:28,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:51:28,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:51:28,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:51:28,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:51:28,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:51:28,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:51:28,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:51:28,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:51:28,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:51:28,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:51:28,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:51:28,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (1/1) ... [2021-11-07 01:51:28,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:51:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:51:28,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:51:28,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:51:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:51:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:51:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:51:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:51:28,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:51:35,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:51:35,366 INFO L299 CfgBuilder]: Removed 617 assume(true) statements. [2021-11-07 01:51:35,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:35 BoogieIcfgContainer [2021-11-07 01:51:35,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:51:35,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:51:35,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:51:35,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:51:35,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:51:27" (1/3) ... [2021-11-07 01:51:35,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4333430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:35, skipping insertion in model container [2021-11-07 01:51:35,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:51:28" (2/3) ... [2021-11-07 01:51:35,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4333430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:51:35, skipping insertion in model container [2021-11-07 01:51:35,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:51:35" (3/3) ... [2021-11-07 01:51:35,381 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product29.cil.c [2021-11-07 01:51:35,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:51:35,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:51:35,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:51:35,464 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 01:51:35,464 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:51:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 1004 states, 997 states have (on average 1.7582748244734203) internal successors, (1753), 1003 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:51:35,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:35,574 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 01:51:35,575 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 01:51:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1057271424, now seen corresponding path program 1 times [2021-11-07 01:51:35,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:35,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648742361] [2021-11-07 01:51:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:35,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:35,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:35,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:51:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:51:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:36,481 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 01:51:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:36,706 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 01:51:36,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:36,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648742361] [2021-11-07 01:51:36,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648742361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:36,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:36,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:51:36,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887948525] [2021-11-07 01:51:36,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:51:36,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:51:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:51:36,742 INFO L87 Difference]: Start difference. First operand has 1004 states, 997 states have (on average 1.7582748244734203) internal successors, (1753), 1003 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 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 01:51:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:36,859 INFO L93 Difference]: Finished difference Result 1727 states and 2990 transitions. [2021-11-07 01:51:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:51:36,861 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 01:51:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:36,894 INFO L225 Difference]: With dead ends: 1727 [2021-11-07 01:51:36,895 INFO L226 Difference]: Without dead ends: 868 [2021-11-07 01:51:36,906 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 01:51:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-07 01:51:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-07 01:51:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 862 states have (on average 1.754060324825986) internal successors, (1512), 867 states have internal predecessors, (1512), 0 states have call successors, (0), 0 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 01:51:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1512 transitions. [2021-11-07 01:51:37,060 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1512 transitions. Word has length 48 [2021-11-07 01:51:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:37,061 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1512 transitions. [2021-11-07 01:51:37,061 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 01:51:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1512 transitions. [2021-11-07 01:51:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:51:37,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:37,068 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 01:51:37,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:37,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:37,279 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 01:51:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1811340205, now seen corresponding path program 1 times [2021-11-07 01:51:37,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:37,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132399134] [2021-11-07 01:51:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:37,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:37,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:37,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:51:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:51:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:38,051 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 01:51:38,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:38,220 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 01:51:38,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:38,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132399134] [2021-11-07 01:51:38,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132399134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:38,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:38,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:38,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750316976] [2021-11-07 01:51:38,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:38,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:38,234 INFO L87 Difference]: Start difference. First operand 868 states and 1512 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 01:51:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:38,430 INFO L93 Difference]: Finished difference Result 2574 states and 4488 transitions. [2021-11-07 01:51:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:51:38,431 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 01:51:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:38,445 INFO L225 Difference]: With dead ends: 2574 [2021-11-07 01:51:38,445 INFO L226 Difference]: Without dead ends: 1721 [2021-11-07 01:51:38,447 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 01:51:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-11-07 01:51:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 867. [2021-11-07 01:51:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 861 states have (on average 1.7502903600464577) internal successors, (1507), 866 states have internal predecessors, (1507), 0 states have call successors, (0), 0 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 01:51:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1507 transitions. [2021-11-07 01:51:38,503 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1507 transitions. Word has length 49 [2021-11-07 01:51:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:38,504 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1507 transitions. [2021-11-07 01:51:38,504 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 01:51:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1507 transitions. [2021-11-07 01:51:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:51:38,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:38,509 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 01:51:38,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:38,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:38,725 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 01:51:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash -847151341, now seen corresponding path program 1 times [2021-11-07 01:51:38,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:38,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6073712] [2021-11-07 01:51:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:38,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:38,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:51:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:51:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:39,460 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 01:51:39,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:39,651 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 01:51:39,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:39,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6073712] [2021-11-07 01:51:39,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6073712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:39,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:39,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:51:39,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821799740] [2021-11-07 01:51:39,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:51:39,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:51:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:51:39,657 INFO L87 Difference]: Start difference. First operand 867 states and 1507 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 01:51:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:40,065 INFO L93 Difference]: Finished difference Result 3385 states and 5890 transitions. [2021-11-07 01:51:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:40,066 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 01:51:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:40,086 INFO L225 Difference]: With dead ends: 3385 [2021-11-07 01:51:40,086 INFO L226 Difference]: Without dead ends: 2536 [2021-11-07 01:51:40,088 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 01:51:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-11-07 01:51:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 866. [2021-11-07 01:51:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 1.7476744186046511) internal successors, (1503), 865 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 01:51:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1503 transitions. [2021-11-07 01:51:40,171 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1503 transitions. Word has length 51 [2021-11-07 01:51:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:40,171 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1503 transitions. [2021-11-07 01:51:40,172 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 01:51:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1503 transitions. [2021-11-07 01:51:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:51:40,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:40,175 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 01:51:40,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:40,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:40,398 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 01:51:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1743598246, now seen corresponding path program 1 times [2021-11-07 01:51:40,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:40,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978280924] [2021-11-07 01:51:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:40,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:40,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:40,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:51:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:40,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:51:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:41,124 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 01:51:41,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:41,299 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 01:51:41,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:41,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978280924] [2021-11-07 01:51:41,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978280924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:41,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:41,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:41,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601486981] [2021-11-07 01:51:41,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:41,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:41,302 INFO L87 Difference]: Start difference. First operand 866 states and 1503 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 01:51:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:41,430 INFO L93 Difference]: Finished difference Result 1729 states and 3003 transitions. [2021-11-07 01:51:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:51:41,430 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 01:51:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:41,438 INFO L225 Difference]: With dead ends: 1729 [2021-11-07 01:51:41,438 INFO L226 Difference]: Without dead ends: 871 [2021-11-07 01:51:41,440 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 01:51:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-07 01:51:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 866. [2021-11-07 01:51:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 1.744186046511628) internal successors, (1500), 865 states have internal predecessors, (1500), 0 states have call successors, (0), 0 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 01:51:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1500 transitions. [2021-11-07 01:51:41,507 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1500 transitions. Word has length 52 [2021-11-07 01:51:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:41,508 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1500 transitions. [2021-11-07 01:51:41,508 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 01:51:41,508 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1500 transitions. [2021-11-07 01:51:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:51:41,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:41,510 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 01:51:41,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:51:41,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:41,729 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 01:51:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1645807109, now seen corresponding path program 1 times [2021-11-07 01:51:41,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:41,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911103870] [2021-11-07 01:51:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:41,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:41,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:41,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:51:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:51:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:42,448 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 01:51:42,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:42,635 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 01:51:42,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:42,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911103870] [2021-11-07 01:51:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911103870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:42,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:42,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:51:42,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817680493] [2021-11-07 01:51:42,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:51:42,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:51:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:51:42,639 INFO L87 Difference]: Start difference. First operand 866 states and 1500 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 01:51:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:43,074 INFO L93 Difference]: Finished difference Result 3372 states and 5866 transitions. [2021-11-07 01:51:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:43,075 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 01:51:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:43,095 INFO L225 Difference]: With dead ends: 3372 [2021-11-07 01:51:43,095 INFO L226 Difference]: Without dead ends: 2532 [2021-11-07 01:51:43,101 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 01:51:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-07 01:51:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 866. [2021-11-07 01:51:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 1.7406976744186047) internal successors, (1497), 865 states have internal predecessors, (1497), 0 states have call successors, (0), 0 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 01:51:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1497 transitions. [2021-11-07 01:51:43,190 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1497 transitions. Word has length 53 [2021-11-07 01:51:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:43,191 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1497 transitions. [2021-11-07 01:51:43,191 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 01:51:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1497 transitions. [2021-11-07 01:51:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:51:43,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:43,194 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 01:51:43,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:43,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:43,410 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 01:51:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1204679946, now seen corresponding path program 1 times [2021-11-07 01:51:43,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:43,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846251713] [2021-11-07 01:51:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:43,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:43,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:43,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:51:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:44,142 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 01:51:44,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:44,334 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 01:51:44,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:44,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846251713] [2021-11-07 01:51:44,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846251713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:44,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:44,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:44,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181262874] [2021-11-07 01:51:44,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:44,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:44,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:44,338 INFO L87 Difference]: Start difference. First operand 866 states and 1497 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 01:51:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:44,551 INFO L93 Difference]: Finished difference Result 2293 states and 3963 transitions. [2021-11-07 01:51:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:51:44,553 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 01:51:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:44,565 INFO L225 Difference]: With dead ends: 2293 [2021-11-07 01:51:44,566 INFO L226 Difference]: Without dead ends: 1706 [2021-11-07 01:51:44,568 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 01:51:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-11-07 01:51:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1119. [2021-11-07 01:51:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1113 states have (on average 1.7637017070979335) internal successors, (1963), 1118 states have internal predecessors, (1963), 0 states have call successors, (0), 0 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 01:51:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1963 transitions. [2021-11-07 01:51:44,681 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1963 transitions. Word has length 55 [2021-11-07 01:51:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:44,682 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1963 transitions. [2021-11-07 01:51:44,682 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 01:51:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1963 transitions. [2021-11-07 01:51:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:51:44,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:44,686 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 01:51:44,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:44,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:44,903 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 01:51:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -11856857, now seen corresponding path program 1 times [2021-11-07 01:51:44,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:44,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137562537] [2021-11-07 01:51:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:44,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:44,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:44,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:51:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:45,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:45,692 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 01:51:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:45,840 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 01:51:45,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:45,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137562537] [2021-11-07 01:51:45,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137562537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:45,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:51:45,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151579533] [2021-11-07 01:51:45,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:45,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:51:45,842 INFO L87 Difference]: Start difference. First operand 1119 states and 1963 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 01:51:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:46,000 INFO L93 Difference]: Finished difference Result 2942 states and 5162 transitions. [2021-11-07 01:51:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:46,001 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 01:51:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:46,013 INFO L225 Difference]: With dead ends: 2942 [2021-11-07 01:51:46,013 INFO L226 Difference]: Without dead ends: 1907 [2021-11-07 01:51:46,015 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 01:51:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-07 01:51:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1320. [2021-11-07 01:51:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1314 states have (on average 1.7747336377473364) internal successors, (2332), 1319 states have internal predecessors, (2332), 0 states have call successors, (0), 0 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 01:51:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2332 transitions. [2021-11-07 01:51:46,113 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2332 transitions. Word has length 67 [2021-11-07 01:51:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:46,113 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2332 transitions. [2021-11-07 01:51:46,114 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 01:51:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2332 transitions. [2021-11-07 01:51:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:51:46,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:46,116 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 01:51:46,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:46,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:46,331 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 01:51:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1634719610, now seen corresponding path program 1 times [2021-11-07 01:51:46,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:46,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267026506] [2021-11-07 01:51:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:46,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:46,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:46,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:46,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:51:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:47,001 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 01:51:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:47,175 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 01:51:47,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:47,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267026506] [2021-11-07 01:51:47,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267026506] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:47,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:47,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:51:47,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547002891] [2021-11-07 01:51:47,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:47,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:51:47,179 INFO L87 Difference]: Start difference. First operand 1320 states and 2332 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 01:51:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:47,351 INFO L93 Difference]: Finished difference Result 3589 states and 6355 transitions. [2021-11-07 01:51:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:47,352 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 01:51:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:47,366 INFO L225 Difference]: With dead ends: 3589 [2021-11-07 01:51:47,367 INFO L226 Difference]: Without dead ends: 2357 [2021-11-07 01:51:47,371 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 01:51:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-11-07 01:51:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1770. [2021-11-07 01:51:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1764 states have (on average 1.7913832199546484) internal successors, (3160), 1769 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 01:51:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 3160 transitions. [2021-11-07 01:51:47,519 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 3160 transitions. Word has length 68 [2021-11-07 01:51:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:47,519 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 3160 transitions. [2021-11-07 01:51:47,519 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 01:51:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 3160 transitions. [2021-11-07 01:51:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:51:47,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:47,523 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:47,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:47,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:47,740 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 01:51:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1992118358, now seen corresponding path program 1 times [2021-11-07 01:51:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:47,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188830616] [2021-11-07 01:51:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:47,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:47,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:47,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:47,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:51:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:48,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:48,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:48,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:48,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188830616] [2021-11-07 01:51:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188830616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:48,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:48,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:48,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131231755] [2021-11-07 01:51:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:48,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:48,619 INFO L87 Difference]: Start difference. First operand 1770 states and 3160 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:48,840 INFO L93 Difference]: Finished difference Result 3842 states and 6818 transitions. [2021-11-07 01:51:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:51:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:48,858 INFO L225 Difference]: With dead ends: 3842 [2021-11-07 01:51:48,858 INFO L226 Difference]: Without dead ends: 2357 [2021-11-07 01:51:48,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:51:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-11-07 01:51:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1770. [2021-11-07 01:51:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1764 states have (on average 1.790249433106576) internal successors, (3158), 1769 states have internal predecessors, (3158), 0 states have call successors, (0), 0 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 01:51:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 3158 transitions. [2021-11-07 01:51:49,007 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 3158 transitions. Word has length 69 [2021-11-07 01:51:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:49,008 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 3158 transitions. [2021-11-07 01:51:49,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 3158 transitions. [2021-11-07 01:51:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:51:49,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:49,011 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 01:51:49,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:49,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:49,227 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 01:51:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 702937429, now seen corresponding path program 1 times [2021-11-07 01:51:49,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:49,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623899101] [2021-11-07 01:51:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:49,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:49,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:49,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:51:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:50,002 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 01:51:50,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:50,213 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 01:51:50,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:50,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623899101] [2021-11-07 01:51:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623899101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:50,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:50,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:51:50,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076642388] [2021-11-07 01:51:50,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:50,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:51:50,216 INFO L87 Difference]: Start difference. First operand 1770 states and 3158 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 01:51:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:50,461 INFO L93 Difference]: Finished difference Result 4911 states and 8788 transitions. [2021-11-07 01:51:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:50,461 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 01:51:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:50,484 INFO L225 Difference]: With dead ends: 4911 [2021-11-07 01:51:50,484 INFO L226 Difference]: Without dead ends: 3237 [2021-11-07 01:51:50,489 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 01:51:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-11-07 01:51:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2650. [2021-11-07 01:51:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 2644 states have (on average 1.8067322239031771) internal successors, (4777), 2649 states have internal predecessors, (4777), 0 states have call successors, (0), 0 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 01:51:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 4777 transitions. [2021-11-07 01:51:50,722 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 4777 transitions. Word has length 69 [2021-11-07 01:51:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 4777 transitions. [2021-11-07 01:51:50,723 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 01:51:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 4777 transitions. [2021-11-07 01:51:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:51:50,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:50,728 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 01:51:50,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:50,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:50,946 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 01:51:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 491304520, now seen corresponding path program 1 times [2021-11-07 01:51:50,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:50,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309753646] [2021-11-07 01:51:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:50,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:50,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:50,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:50,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:51:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:51,730 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 01:51:51,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:51,921 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 01:51:51,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:51,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309753646] [2021-11-07 01:51:51,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309753646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:51,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:51,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:51:51,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67730145] [2021-11-07 01:51:51,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:51,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:51:51,925 INFO L87 Difference]: Start difference. First operand 2650 states and 4777 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 01:51:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:52,243 INFO L93 Difference]: Finished difference Result 7287 states and 13164 transitions. [2021-11-07 01:51:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:52,244 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 01:51:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:52,295 INFO L225 Difference]: With dead ends: 7287 [2021-11-07 01:51:52,296 INFO L226 Difference]: Without dead ends: 4767 [2021-11-07 01:51:52,302 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 01:51:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-11-07 01:51:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4180. [2021-11-07 01:51:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 4174 states have (on average 1.8183996166746526) internal successors, (7590), 4179 states have internal predecessors, (7590), 0 states have call successors, (0), 0 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 01:51:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 7590 transitions. [2021-11-07 01:51:52,625 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 7590 transitions. Word has length 70 [2021-11-07 01:51:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:52,626 INFO L470 AbstractCegarLoop]: Abstraction has 4180 states and 7590 transitions. [2021-11-07 01:51:52,627 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 01:51:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 7590 transitions. [2021-11-07 01:51:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:51:52,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:52,635 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 01:51:52,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:52,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:52,853 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 01:51:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 933394790, now seen corresponding path program 1 times [2021-11-07 01:51:52,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:52,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730458907] [2021-11-07 01:51:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:52,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:52,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:52,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:51:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:53,710 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 01:51:53,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:53,906 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 01:51:53,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:53,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730458907] [2021-11-07 01:51:53,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730458907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:53,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:53,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:51:53,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349119553] [2021-11-07 01:51:53,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:53,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:51:53,908 INFO L87 Difference]: Start difference. First operand 4180 states and 7590 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 01:51:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:54,402 INFO L93 Difference]: Finished difference Result 11593 states and 21086 transitions. [2021-11-07 01:51:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:54,403 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 01:51:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:54,431 INFO L225 Difference]: With dead ends: 11593 [2021-11-07 01:51:54,431 INFO L226 Difference]: Without dead ends: 7577 [2021-11-07 01:51:54,438 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 01:51:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7577 states. [2021-11-07 01:51:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7577 to 6990. [2021-11-07 01:51:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6984 states have (on average 1.8257445589919816) internal successors, (12751), 6989 states have internal predecessors, (12751), 0 states have call successors, (0), 0 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 01:51:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 12751 transitions. [2021-11-07 01:51:55,011 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 12751 transitions. Word has length 71 [2021-11-07 01:51:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:55,012 INFO L470 AbstractCegarLoop]: Abstraction has 6990 states and 12751 transitions. [2021-11-07 01:51:55,013 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 01:51:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 12751 transitions. [2021-11-07 01:51:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:51:55,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:55,022 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] [2021-11-07 01:51:55,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:55,239 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 01:51:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1065198506, now seen corresponding path program 1 times [2021-11-07 01:51:55,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:55,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672095267] [2021-11-07 01:51:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:55,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:55,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:55,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:51:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:51:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:56,194 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 01:51:56,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:56,421 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 01:51:56,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:56,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672095267] [2021-11-07 01:51:56,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672095267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:56,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:56,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:51:56,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523191491] [2021-11-07 01:51:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:51:56,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:51:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:51:56,424 INFO L87 Difference]: Start difference. First operand 6990 states and 12751 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:59,866 INFO L93 Difference]: Finished difference Result 26483 states and 48360 transitions. [2021-11-07 01:51:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:51:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:51:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:59,934 INFO L225 Difference]: With dead ends: 26483 [2021-11-07 01:51:59,934 INFO L226 Difference]: Without dead ends: 19776 [2021-11-07 01:51:59,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 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 01:51:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-11-07 01:52:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 6940. [2021-11-07 01:52:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6934 states have (on average 1.8100663397750216) internal successors, (12551), 6939 states have internal predecessors, (12551), 0 states have call successors, (0), 0 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 01:52:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 12551 transitions. [2021-11-07 01:52:00,629 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 12551 transitions. Word has length 72 [2021-11-07 01:52:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:00,630 INFO L470 AbstractCegarLoop]: Abstraction has 6940 states and 12551 transitions. [2021-11-07 01:52:00,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 12551 transitions. [2021-11-07 01:52:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:52:00,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:00,639 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 01:52:00,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:00,855 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 01:52:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1078340487, now seen corresponding path program 1 times [2021-11-07 01:52:00,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:00,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15263849] [2021-11-07 01:52:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:00,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:00,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:00,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:52:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:01,785 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 01:52:01,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:01,976 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 01:52:01,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15263849] [2021-11-07 01:52:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15263849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:01,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:52:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305333706] [2021-11-07 01:52:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:52:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:52:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:52:01,979 INFO L87 Difference]: Start difference. First operand 6940 states and 12551 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 01:52:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:02,731 INFO L93 Difference]: Finished difference Result 20334 states and 36823 transitions. [2021-11-07 01:52:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:02,732 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 01:52:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:02,770 INFO L225 Difference]: With dead ends: 20334 [2021-11-07 01:52:02,770 INFO L226 Difference]: Without dead ends: 13561 [2021-11-07 01:52:02,780 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 01:52:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13561 states. [2021-11-07 01:52:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13561 to 12974. [2021-11-07 01:52:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12974 states, 12968 states have (on average 1.8130783466995681) internal successors, (23512), 12973 states have internal predecessors, (23512), 0 states have call successors, (0), 0 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 01:52:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12974 states to 12974 states and 23512 transitions. [2021-11-07 01:52:03,607 INFO L78 Accepts]: Start accepts. Automaton has 12974 states and 23512 transitions. Word has length 72 [2021-11-07 01:52:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 12974 states and 23512 transitions. [2021-11-07 01:52:03,608 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 01:52:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 12974 states and 23512 transitions. [2021-11-07 01:52:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:52:03,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:03,619 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] [2021-11-07 01:52:03,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:03,834 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 01:52:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 678238885, now seen corresponding path program 1 times [2021-11-07 01:52:03,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:03,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322452938] [2021-11-07 01:52:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:03,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:03,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:52:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:04,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:05,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:05,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322452938] [2021-11-07 01:52:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322452938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:05,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891584851] [2021-11-07 01:52:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:05,185 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:05,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:05,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:52:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:06,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:06,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:06,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891584851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:06,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:52:06,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:52:06,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215315733] [2021-11-07 01:52:06,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:52:06,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:52:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:52:06,695 INFO L87 Difference]: Start difference. First operand 12974 states and 23512 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 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 01:52:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:07,467 INFO L93 Difference]: Finished difference Result 13463 states and 24341 transitions. [2021-11-07 01:52:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 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 73 [2021-11-07 01:52:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:07,503 INFO L225 Difference]: With dead ends: 13463 [2021-11-07 01:52:07,503 INFO L226 Difference]: Without dead ends: 12976 [2021-11-07 01:52:07,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:52:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-11-07 01:52:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 12962. [2021-11-07 01:52:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12958 states have (on average 1.8130884395740083) internal successors, (23494), 12961 states have internal predecessors, (23494), 0 states have call successors, (0), 0 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 01:52:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 23494 transitions. [2021-11-07 01:52:08,249 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 23494 transitions. Word has length 73 [2021-11-07 01:52:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 12962 states and 23494 transitions. [2021-11-07 01:52:08,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 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 01:52:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 23494 transitions. [2021-11-07 01:52:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:52:08,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:08,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:08,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:08,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:08,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:52:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1149002821, now seen corresponding path program 1 times [2021-11-07 01:52:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:08,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203161888] [2021-11-07 01:52:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:08,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:08,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:08,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:52:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:09,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:10,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:10,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203161888] [2021-11-07 01:52:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203161888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:10,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006223546] [2021-11-07 01:52:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:10,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:10,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:10,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:52:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:52:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2006223546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:12,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:52:12,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:52:12,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150768954] [2021-11-07 01:52:12,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:52:12,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:52:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:52:12,331 INFO L87 Difference]: Start difference. First operand 12962 states and 23494 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:19,682 INFO L93 Difference]: Finished difference Result 83706 states and 151635 transitions. [2021-11-07 01:52:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:52:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:52:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:19,848 INFO L225 Difference]: With dead ends: 83706 [2021-11-07 01:52:19,848 INFO L226 Difference]: Without dead ends: 83149 [2021-11-07 01:52:19,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:52:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83149 states. [2021-11-07 01:52:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83149 to 25694. [2021-11-07 01:52:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25694 states, 25690 states have (on average 1.8138964577656675) internal successors, (46599), 25693 states have internal predecessors, (46599), 0 states have call successors, (0), 0 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 01:52:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25694 states to 25694 states and 46599 transitions. [2021-11-07 01:52:22,547 INFO L78 Accepts]: Start accepts. Automaton has 25694 states and 46599 transitions. Word has length 113 [2021-11-07 01:52:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:22,548 INFO L470 AbstractCegarLoop]: Abstraction has 25694 states and 46599 transitions. [2021-11-07 01:52:22,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25694 states and 46599 transitions. [2021-11-07 01:52:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:52:22,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:22,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:22,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:22,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:52:23,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:23,026 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:52:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1931418696, now seen corresponding path program 1 times [2021-11-07 01:52:23,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:23,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496174156] [2021-11-07 01:52:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:23,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:23,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:23,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:52:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:24,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:52:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:24,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:24,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:24,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496174156] [2021-11-07 01:52:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496174156] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:24,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:24,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:52:24,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472352785] [2021-11-07 01:52:24,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:24,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:24,685 INFO L87 Difference]: Start difference. First operand 25694 states and 46599 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 01:52:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:26,015 INFO L93 Difference]: Finished difference Result 50570 states and 91935 transitions. [2021-11-07 01:52:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 01:52:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:26,053 INFO L225 Difference]: With dead ends: 50570 [2021-11-07 01:52:26,053 INFO L226 Difference]: Without dead ends: 25162 [2021-11-07 01:52:26,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:52:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25162 states. [2021-11-07 01:52:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25162 to 12964. [2021-11-07 01:52:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12960 states have (on average 1.8127314814814814) internal successors, (23493), 12963 states have internal predecessors, (23493), 0 states have call successors, (0), 0 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 01:52:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 23493 transitions. [2021-11-07 01:52:26,809 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 23493 transitions. Word has length 114 [2021-11-07 01:52:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:26,809 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 23493 transitions. [2021-11-07 01:52:26,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 01:52:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 23493 transitions. [2021-11-07 01:52:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 01:52:26,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:26,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:26,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:27,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:27,030 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:52:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash -265756035, now seen corresponding path program 1 times [2021-11-07 01:52:27,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:27,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421570861] [2021-11-07 01:52:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:27,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:27,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:27,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:52:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:27,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:28,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:28,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:28,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421570861] [2021-11-07 01:52:28,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421570861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:28,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695584040] [2021-11-07 01:52:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:28,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:28,431 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:28,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:52:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:52:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:30,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:30,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695584040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:30,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:52:30,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:52:30,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539022440] [2021-11-07 01:52:30,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:52:30,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:52:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:52:30,311 INFO L87 Difference]: Start difference. First operand 12964 states and 23493 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:33,276 INFO L93 Difference]: Finished difference Result 13970 states and 25205 transitions. [2021-11-07 01:52:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:52:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 01:52:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:33,296 INFO L225 Difference]: With dead ends: 13970 [2021-11-07 01:52:33,296 INFO L226 Difference]: Without dead ends: 13402 [2021-11-07 01:52:33,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:52:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13402 states. [2021-11-07 01:52:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13402 to 12960. [2021-11-07 01:52:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12956 states have (on average 1.8126736647113306) internal successors, (23485), 12959 states have internal predecessors, (23485), 0 states have call successors, (0), 0 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 01:52:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 23485 transitions. [2021-11-07 01:52:34,148 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 23485 transitions. Word has length 115 [2021-11-07 01:52:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:34,148 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 23485 transitions. [2021-11-07 01:52:34,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 23485 transitions. [2021-11-07 01:52:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:52:34,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:34,159 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:34,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:34,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:34,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:34,560 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:52:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1648339919, now seen corresponding path program 1 times [2021-11-07 01:52:34,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:34,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443522127] [2021-11-07 01:52:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:34,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:34,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:34,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:52:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:35,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:36,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443522127] [2021-11-07 01:52:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443522127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126419090] [2021-11-07 01:52:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:36,053 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:36,055 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:36,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:52:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:37,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:52:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:52:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2126419090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:38,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:52:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:52:38,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012183701] [2021-11-07 01:52:38,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:52:38,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:52:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:52:38,596 INFO L87 Difference]: Start difference. First operand 12960 states and 23485 transitions. Second operand has 16 states, 16 states have (on average 10.5625) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 01:52:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:55,033 INFO L93 Difference]: Finished difference Result 29938 states and 53640 transitions. [2021-11-07 01:52:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:52:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 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 117 [2021-11-07 01:52:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:55,070 INFO L225 Difference]: With dead ends: 29938 [2021-11-07 01:52:55,070 INFO L226 Difference]: Without dead ends: 29429 [2021-11-07 01:52:55,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:52:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29429 states. [2021-11-07 01:52:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29429 to 25662. [2021-11-07 01:52:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25662 states, 25658 states have (on average 1.8137423025956816) internal successors, (46537), 25661 states have internal predecessors, (46537), 0 states have call successors, (0), 0 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 01:52:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25662 states to 25662 states and 46537 transitions. [2021-11-07 01:52:56,460 INFO L78 Accepts]: Start accepts. Automaton has 25662 states and 46537 transitions. Word has length 117 [2021-11-07 01:52:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:56,460 INFO L470 AbstractCegarLoop]: Abstraction has 25662 states and 46537 transitions. [2021-11-07 01:52:56,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 01:52:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25662 states and 46537 transitions. [2021-11-07 01:52:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:52:56,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:56,485 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:56,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:52:56,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:52:56,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:56,892 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:52:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1914305239, now seen corresponding path program 1 times [2021-11-07 01:52:56,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:56,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349769858] [2021-11-07 01:52:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:56,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:56,894 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:56,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:52:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:58,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:58,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349769858] [2021-11-07 01:52:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349769858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338463597] [2021-11-07 01:52:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:58,534 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:58,544 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:58,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:52:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:00,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:00,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338463597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:00,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:00,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:53:00,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768705607] [2021-11-07 01:53:00,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:00,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:53:00,510 INFO L87 Difference]: Start difference. First operand 25662 states and 46537 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:01,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:01,893 INFO L93 Difference]: Finished difference Result 26709 states and 48311 transitions. [2021-11-07 01:53:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:53:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:01,931 INFO L225 Difference]: With dead ends: 26709 [2021-11-07 01:53:01,931 INFO L226 Difference]: Without dead ends: 26139 [2021-11-07 01:53:01,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:53:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26139 states. [2021-11-07 01:53:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26139 to 25661. [2021-11-07 01:53:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25661 states, 25657 states have (on average 1.8136570916319132) internal successors, (46533), 25660 states have internal predecessors, (46533), 0 states have call successors, (0), 0 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 01:53:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25661 states to 25661 states and 46533 transitions. [2021-11-07 01:53:03,509 INFO L78 Accepts]: Start accepts. Automaton has 25661 states and 46533 transitions. Word has length 118 [2021-11-07 01:53:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:03,510 INFO L470 AbstractCegarLoop]: Abstraction has 25661 states and 46533 transitions. [2021-11-07 01:53:03,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25661 states and 46533 transitions. [2021-11-07 01:53:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:53:03,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:03,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:03,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:53:03,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:03,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:03,968 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:53:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -369097163, now seen corresponding path program 1 times [2021-11-07 01:53:03,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:03,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436620102] [2021-11-07 01:53:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:03,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:03,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:03,970 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:03,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:53:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:06,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:06,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436620102] [2021-11-07 01:53:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436620102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:06,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148761430] [2021-11-07 01:53:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:06,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:06,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:06,033 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:06,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:53:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:53:07,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:08,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:08,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148761430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:08,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:08,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:53:08,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400509036] [2021-11-07 01:53:08,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:08,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:53:08,694 INFO L87 Difference]: Start difference. First operand 25661 states and 46533 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:11,992 INFO L93 Difference]: Finished difference Result 52472 states and 94987 transitions. [2021-11-07 01:53:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:53:11,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:53:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:12,078 INFO L225 Difference]: With dead ends: 52472 [2021-11-07 01:53:12,078 INFO L226 Difference]: Without dead ends: 51609 [2021-11-07 01:53:12,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:53:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51609 states. [2021-11-07 01:53:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51609 to 50642. [2021-11-07 01:53:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50642 states, 50638 states have (on average 1.8148623563331885) internal successors, (91901), 50641 states have internal predecessors, (91901), 0 states have call successors, (0), 0 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 01:53:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50642 states to 50642 states and 91901 transitions. [2021-11-07 01:53:15,620 INFO L78 Accepts]: Start accepts. Automaton has 50642 states and 91901 transitions. Word has length 118 [2021-11-07 01:53:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:15,620 INFO L470 AbstractCegarLoop]: Abstraction has 50642 states and 91901 transitions. [2021-11-07 01:53:15,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 50642 states and 91901 transitions. [2021-11-07 01:53:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:53:15,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:15,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:15,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:15,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:16,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:16,084 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:53:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash 588294619, now seen corresponding path program 1 times [2021-11-07 01:53:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:16,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30542839] [2021-11-07 01:53:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:16,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:16,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:16,089 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:16,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:53:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:18,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:18,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30542839] [2021-11-07 01:53:18,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30542839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545632536] [2021-11-07 01:53:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:18,657 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:18,658 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:18,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:53:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:20,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:53:20,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:21,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:21,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545632536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:21,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:21,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:53:21,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272691956] [2021-11-07 01:53:21,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:21,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:53:21,482 INFO L87 Difference]: Start difference. First operand 50642 states and 91901 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 01:53:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:26,481 INFO L93 Difference]: Finished difference Result 52296 states and 94708 transitions. [2021-11-07 01:53:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 01:53:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:26,566 INFO L225 Difference]: With dead ends: 52296 [2021-11-07 01:53:26,567 INFO L226 Difference]: Without dead ends: 50521 [2021-11-07 01:53:26,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:53:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50521 states. [2021-11-07 01:53:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50521 to 50162. [2021-11-07 01:53:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50162 states, 50158 states have (on average 1.815642569480442) internal successors, (91069), 50161 states have internal predecessors, (91069), 0 states have call successors, (0), 0 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 01:53:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50162 states to 50162 states and 91069 transitions. [2021-11-07 01:53:30,535 INFO L78 Accepts]: Start accepts. Automaton has 50162 states and 91069 transitions. Word has length 119 [2021-11-07 01:53:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:30,536 INFO L470 AbstractCegarLoop]: Abstraction has 50162 states and 91069 transitions. [2021-11-07 01:53:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 01:53:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50162 states and 91069 transitions. [2021-11-07 01:53:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:53:30,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:30,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:30,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:30,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:53:31,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:31,010 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:53:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash -176201987, now seen corresponding path program 1 times [2021-11-07 01:53:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:31,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562633352] [2021-11-07 01:53:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:31,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:31,013 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:31,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:53:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:33,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:33,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:33,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562633352] [2021-11-07 01:53:33,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562633352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:33,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76767203] [2021-11-07 01:53:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:33,451 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:33,451 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:33,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:53:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:53:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:36,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76767203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:36,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:53:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336605235] [2021-11-07 01:53:36,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:53:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:53:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:53:36,367 INFO L87 Difference]: Start difference. First operand 50162 states and 91069 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 01:53:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:41,937 INFO L93 Difference]: Finished difference Result 51832 states and 93856 transitions. [2021-11-07 01:53:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:53:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 01:53:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:42,022 INFO L225 Difference]: With dead ends: 51832 [2021-11-07 01:53:42,022 INFO L226 Difference]: Without dead ends: 50630 [2021-11-07 01:53:42,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:53:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50630 states. [2021-11-07 01:53:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50630 to 50114. [2021-11-07 01:53:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50114 states, 50110 states have (on average 1.8152265016962683) internal successors, (90961), 50113 states have internal predecessors, (90961), 0 states have call successors, (0), 0 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 01:53:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50114 states to 50114 states and 90961 transitions. [2021-11-07 01:53:45,215 INFO L78 Accepts]: Start accepts. Automaton has 50114 states and 90961 transitions. Word has length 119 [2021-11-07 01:53:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:45,215 INFO L470 AbstractCegarLoop]: Abstraction has 50114 states and 90961 transitions. [2021-11-07 01:53:45,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 01:53:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50114 states and 90961 transitions. [2021-11-07 01:53:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:53:45,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:45,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:45,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:45,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:45,673 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:53:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1699708635, now seen corresponding path program 1 times [2021-11-07 01:53:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:45,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117702346] [2021-11-07 01:53:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:45,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:45,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:45,675 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:45,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:53:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:47,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:48,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:48,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117702346] [2021-11-07 01:53:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117702346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:48,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816332299] [2021-11-07 01:53:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:48,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:48,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:48,267 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:48,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758d610e-1d4a-43ec-b417-860fb2f5011e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:53:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:53:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:51,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:53:52,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816332299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:52,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:52,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:53:52,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172937249] [2021-11-07 01:53:52,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:53:52,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:53:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:53:52,083 INFO L87 Difference]: Start difference. First operand 50114 states and 90961 transitions. Second operand has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)