./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product20.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_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/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_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/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_e62d7cfe-e644-49d0-8391-fd8015a71ace/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 da4068869d66a98d783b3eb3a8d0497ba7ef569dcf8b3f3f7d9e0053e2966936 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:14:40,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:14:40,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:14:40,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:14:40,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:14:40,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:14:40,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:14:40,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:14:40,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:14:40,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:14:40,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:14:40,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:14:40,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:14:40,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:14:40,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:14:40,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:14:40,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:14:40,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:14:40,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:14:40,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:14:40,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:14:40,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:14:40,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:14:40,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:14:40,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:14:40,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:14:40,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:14:40,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:14:40,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:14:40,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:14:40,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:14:40,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:14:40,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:14:40,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:14:40,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:14:40,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:14:40,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:14:40,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:14:40,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:14:40,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:14:40,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:14:40,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:14:40,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:14:40,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:14:40,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:14:40,579 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:14:40,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:14:40,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:14:40,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:14:40,580 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:14:40,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:14:40,587 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:14:40,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:14:40,588 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:14:40,588 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:14:40,589 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:14:40,589 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:14:40,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:14:40,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:14:40,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:14:40,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:14:40,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:14:40,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:14:40,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:14:40,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:14:40,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:14:40,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:14:40,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:14:40,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:14:40,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:14:40,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:14:40,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:14:40,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:14:40,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:14:40,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:14:40,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:14:40,596 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:14:40,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:14:40,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:14:40,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:14:40,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:14:40,597 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da4068869d66a98d783b3eb3a8d0497ba7ef569dcf8b3f3f7d9e0053e2966936 [2021-11-07 01:14:40,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:14:40,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:14:40,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:14:40,892 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:14:40,893 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:14:40,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product20.cil.c [2021-11-07 01:14:40,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/409b90c59/25ca677f80d940caba766b7072d84546/FLAG45ab733db [2021-11-07 01:14:41,598 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:14:41,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c [2021-11-07 01:14:41,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/409b90c59/25ca677f80d940caba766b7072d84546/FLAG45ab733db [2021-11-07 01:14:41,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/409b90c59/25ca677f80d940caba766b7072d84546 [2021-11-07 01:14:41,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:14:41,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:14:41,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:14:41,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:14:41,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:14:41,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:41" (1/1) ... [2021-11-07 01:14:41,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b01a0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:41, skipping insertion in model container [2021-11-07 01:14:41,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:41" (1/1) ... [2021-11-07 01:14:41,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:14:42,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:14:42,718 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c[63436,63449] [2021-11-07 01:14:42,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:14:42,755 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 01:14:42,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56a8fa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:42, skipping insertion in model container [2021-11-07 01:14:42,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:14:42,756 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:14:42,758 INFO L168 Benchmark]: Toolchain (without parser) took 807.80 ms. Allocated memory is still 117.4 MB. Free memory was 74.9 MB in the beginning and 78.0 MB in the end (delta: -3.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:14:42,759 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 94.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:14:42,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 803.13 ms. Allocated memory is still 117.4 MB. Free memory was 74.7 MB in the beginning and 78.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:14:42,762 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 94.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 803.13 ms. Allocated memory is still 117.4 MB. Free memory was 74.7 MB in the beginning and 78.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1557]: 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/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_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/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_e62d7cfe-e644-49d0-8391-fd8015a71ace/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 da4068869d66a98d783b3eb3a8d0497ba7ef569dcf8b3f3f7d9e0053e2966936 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:14:45,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:14:45,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:14:45,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:14:45,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:14:45,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:14:45,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:14:45,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:14:45,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:14:45,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:14:45,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:14:45,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:14:45,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:14:45,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:14:45,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:14:45,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:14:45,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:14:45,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:14:45,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:14:45,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:14:45,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:14:45,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:14:45,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:14:45,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:14:45,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:14:45,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:14:45,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:14:45,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:14:45,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:14:45,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:14:45,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:14:45,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:14:45,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:14:45,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:14:45,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:14:45,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:14:45,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:14:45,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:14:45,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:14:45,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:14:45,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:14:45,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:14:45,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:14:45,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:14:45,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:14:45,248 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:14:45,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:14:45,249 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:14:45,250 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:14:45,250 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:14:45,250 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:14:45,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:14:45,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:14:45,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:14:45,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:14:45,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:14:45,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:14:45,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:14:45,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:14:45,255 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:14:45,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:14:45,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:14:45,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:14:45,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:14:45,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:14:45,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:14:45,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:14:45,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:14:45,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:14:45,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:14:45,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:14:45,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:14:45,258 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:14:45,258 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:45,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:14:45,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:14:45,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:14:45,259 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da4068869d66a98d783b3eb3a8d0497ba7ef569dcf8b3f3f7d9e0053e2966936 [2021-11-07 01:14:45,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:14:45,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:14:45,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:14:45,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:14:45,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:14:45,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product20.cil.c [2021-11-07 01:14:45,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/30457eb2d/e24e20b0084d4b3e932a87be17e630ff/FLAGd4ef53dbc [2021-11-07 01:14:46,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:14:46,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c [2021-11-07 01:14:46,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/30457eb2d/e24e20b0084d4b3e932a87be17e630ff/FLAGd4ef53dbc [2021-11-07 01:14:46,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/data/30457eb2d/e24e20b0084d4b3e932a87be17e630ff [2021-11-07 01:14:46,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:14:46,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:14:46,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:14:46,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:14:46,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:14:46,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:46" (1/1) ... [2021-11-07 01:14:46,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a901442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:46, skipping insertion in model container [2021-11-07 01:14:46,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:46" (1/1) ... [2021-11-07 01:14:46,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:14:46,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:14:47,570 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c[63436,63449] [2021-11-07 01:14:47,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:14:47,589 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:14:47,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:14:47,698 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c[63436,63449] [2021-11-07 01:14:47,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:14:47,706 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:14:47,809 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_e62d7cfe-e644-49d0-8391-fd8015a71ace/sv-benchmarks/c/product-lines/email_spec9_product20.cil.c[63436,63449] [2021-11-07 01:14:47,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:14:47,870 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:14:47,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47 WrapperNode [2021-11-07 01:14:47,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:14:47,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:14:47,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:14:47,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:14:47,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:47,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:14:48,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:14:48,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:14:48,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:14:48,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:14:48,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:14:48,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:14:48,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:14:48,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (1/1) ... [2021-11-07 01:14:48,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:14:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:48,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:14:48,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:14:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:14:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:14:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:14:48,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:14:48,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:14:53,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:14:53,993 INFO L299 CfgBuilder]: Removed 541 assume(true) statements. [2021-11-07 01:14:53,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:53 BoogieIcfgContainer [2021-11-07 01:14:53,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:14:53,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:14:53,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:14:54,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:14:54,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:14:46" (1/3) ... [2021-11-07 01:14:54,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bf0ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:54, skipping insertion in model container [2021-11-07 01:14:54,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:47" (2/3) ... [2021-11-07 01:14:54,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bf0ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:54, skipping insertion in model container [2021-11-07 01:14:54,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:53" (3/3) ... [2021-11-07 01:14:54,005 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product20.cil.c [2021-11-07 01:14:54,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:14:54,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:14:54,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:14:54,083 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 01:14:54,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:14:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 842 states, 835 states have (on average 1.7604790419161678) internal successors, (1470), 841 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states 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 01:14:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:14:54,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:54,155 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:54,156 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 01:14:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1964609838, now seen corresponding path program 1 times [2021-11-07 01:14:54,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:54,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067203962] [2021-11-07 01:14:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:54,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:54,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:54,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:14:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:14:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:54,808 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 01:14:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:54,934 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 01:14:54,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:54,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067203962] [2021-11-07 01:14:54,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067203962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:54,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:54,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:14:54,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135589552] [2021-11-07 01:14:54,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:14:54,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:14:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:14:54,961 INFO L87 Difference]: Start difference. First operand has 842 states, 835 states have (on average 1.7604790419161678) internal successors, (1470), 841 states have internal predecessors, (1470), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:14:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:55,108 INFO L93 Difference]: Finished difference Result 1399 states and 2417 transitions. [2021-11-07 01:14:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:14:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:14:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:55,149 INFO L225 Difference]: With dead ends: 1399 [2021-11-07 01:14:55,150 INFO L226 Difference]: Without dead ends: 754 [2021-11-07 01:14:55,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:14:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-07 01:14:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-11-07 01:14:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 748 states have (on average 1.7553475935828877) internal successors, (1313), 753 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 01:14:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1313 transitions. [2021-11-07 01:14:55,317 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1313 transitions. Word has length 44 [2021-11-07 01:14:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:55,318 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1313 transitions. [2021-11-07 01:14:55,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:14:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1313 transitions. [2021-11-07 01:14:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:14:55,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:55,322 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] [2021-11-07 01:14:55,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:55,544 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 01:14:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1101286922, now seen corresponding path program 1 times [2021-11-07 01:14:55,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:55,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031838840] [2021-11-07 01:14:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:55,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:55,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:55,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:14:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:56,161 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 01:14:56,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:56,304 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 01:14:56,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:56,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031838840] [2021-11-07 01:14:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031838840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:56,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:56,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:56,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200359935] [2021-11-07 01:14:56,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:56,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:56,313 INFO L87 Difference]: Start difference. First operand 754 states and 1313 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 01:14:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:56,484 INFO L93 Difference]: Finished difference Result 2232 states and 3891 transitions. [2021-11-07 01:14:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-11-07 01:14:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:56,498 INFO L225 Difference]: With dead ends: 2232 [2021-11-07 01:14:56,498 INFO L226 Difference]: Without dead ends: 1493 [2021-11-07 01:14:56,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:14:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-11-07 01:14:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 753. [2021-11-07 01:14:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 747 states have (on average 1.751004016064257) internal successors, (1308), 752 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 01:14:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1308 transitions. [2021-11-07 01:14:56,547 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1308 transitions. Word has length 45 [2021-11-07 01:14:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:56,547 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1308 transitions. [2021-11-07 01:14:56,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 01:14:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1308 transitions. [2021-11-07 01:14:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:14:56,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:56,550 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] [2021-11-07 01:14:56,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:56,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:56,765 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 01:14:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2094754704, now seen corresponding path program 1 times [2021-11-07 01:14:56,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:56,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405271112] [2021-11-07 01:14:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:56,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:56,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:56,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:14:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:57,351 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 01:14:57,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:57,513 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 01:14:57,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:57,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405271112] [2021-11-07 01:14:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405271112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:57,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:57,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:57,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518096938] [2021-11-07 01:14:57,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:57,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:57,517 INFO L87 Difference]: Start difference. First operand 753 states and 1308 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 01:14:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:57,846 INFO L93 Difference]: Finished difference Result 2929 states and 5094 transitions. [2021-11-07 01:14:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 47 [2021-11-07 01:14:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:57,862 INFO L225 Difference]: With dead ends: 2929 [2021-11-07 01:14:57,862 INFO L226 Difference]: Without dead ends: 2194 [2021-11-07 01:14:57,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:14:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-07 01:14:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 752. [2021-11-07 01:14:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.7479892761394102) internal successors, (1304), 751 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states 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 01:14:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1304 transitions. [2021-11-07 01:14:57,937 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1304 transitions. Word has length 47 [2021-11-07 01:14:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:57,937 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1304 transitions. [2021-11-07 01:14:57,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 01:14:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1304 transitions. [2021-11-07 01:14:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:14:57,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:57,942 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 01:14:57,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:58,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:58,158 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 01:14:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112515, now seen corresponding path program 1 times [2021-11-07 01:14:58,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:58,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337472737] [2021-11-07 01:14:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:58,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:58,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:58,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:14:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:58,774 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 01:14:58,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:58,942 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 01:14:58,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337472737] [2021-11-07 01:14:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337472737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:58,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:58,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:58,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848650995] [2021-11-07 01:14:58,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:58,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:58,947 INFO L87 Difference]: Start difference. First operand 752 states and 1304 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 01:14:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:59,043 INFO L93 Difference]: Finished difference Result 1501 states and 2605 transitions. [2021-11-07 01:14:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:59,044 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 48 [2021-11-07 01:14:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:59,050 INFO L225 Difference]: With dead ends: 1501 [2021-11-07 01:14:59,050 INFO L226 Difference]: Without dead ends: 757 [2021-11-07 01:14:59,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:14:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-07 01:14:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 752. [2021-11-07 01:14:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.7439678284182305) internal successors, (1301), 751 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states 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 01:14:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1301 transitions. [2021-11-07 01:14:59,105 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1301 transitions. Word has length 48 [2021-11-07 01:14:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:59,105 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1301 transitions. [2021-11-07 01:14:59,106 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 01:14:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1301 transitions. [2021-11-07 01:14:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:14:59,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:59,109 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 01:14:59,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:14:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:59,323 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 01:14:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1978940584, now seen corresponding path program 1 times [2021-11-07 01:14:59,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:59,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126023776] [2021-11-07 01:14:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:59,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:59,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:59,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:59,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:14:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:59,898 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 01:14:59,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:00,044 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 01:15:00,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:00,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126023776] [2021-11-07 01:15:00,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126023776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:00,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:00,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:15:00,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310622462] [2021-11-07 01:15:00,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:15:00,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:15:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:15:00,047 INFO L87 Difference]: Start difference. First operand 752 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:15:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:00,353 INFO L93 Difference]: Finished difference Result 2916 states and 5070 transitions. [2021-11-07 01:15:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:15:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 49 [2021-11-07 01:15:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:00,368 INFO L225 Difference]: With dead ends: 2916 [2021-11-07 01:15:00,368 INFO L226 Difference]: Without dead ends: 2190 [2021-11-07 01:15:00,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:15:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-11-07 01:15:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 752. [2021-11-07 01:15:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.739946380697051) internal successors, (1298), 751 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states 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 01:15:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1298 transitions. [2021-11-07 01:15:00,436 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1298 transitions. Word has length 49 [2021-11-07 01:15:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:00,437 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1298 transitions. [2021-11-07 01:15:00,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:15:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1298 transitions. [2021-11-07 01:15:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:15:00,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:00,439 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 01:15:00,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:00,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:00,653 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 01:15:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash 593791443, now seen corresponding path program 1 times [2021-11-07 01:15:00,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:00,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422576981] [2021-11-07 01:15:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:00,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:00,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:00,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:15:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:01,273 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 01:15:01,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:01,399 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 01:15:01,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:01,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422576981] [2021-11-07 01:15:01,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422576981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:01,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:01,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:15:01,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345072372] [2021-11-07 01:15:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:15:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:15:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:15:01,401 INFO L87 Difference]: Start difference. First operand 752 states and 1298 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 01:15:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:01,520 INFO L93 Difference]: Finished difference Result 1947 states and 3359 transitions. [2021-11-07 01:15:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:15:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:15:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:01,530 INFO L225 Difference]: With dead ends: 1947 [2021-11-07 01:15:01,530 INFO L226 Difference]: Without dead ends: 1478 [2021-11-07 01:15:01,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:15:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-11-07 01:15:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1009. [2021-11-07 01:15:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1003 states have (on average 1.765702891326022) internal successors, (1771), 1008 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states 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 01:15:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1771 transitions. [2021-11-07 01:15:01,620 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1771 transitions. Word has length 51 [2021-11-07 01:15:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:01,621 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1771 transitions. [2021-11-07 01:15:01,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 01:15:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1771 transitions. [2021-11-07 01:15:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:15:01,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:01,623 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] [2021-11-07 01:15:01,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:01,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:01,840 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 01:15:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1413731236, now seen corresponding path program 1 times [2021-11-07 01:15:01,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:01,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283415130] [2021-11-07 01:15:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:01,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:01,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:01,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:15:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:02,503 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 01:15:02,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:02,657 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 01:15:02,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:02,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283415130] [2021-11-07 01:15:02,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283415130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:02,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:02,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:02,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427215737] [2021-11-07 01:15:02,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:02,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:02,660 INFO L87 Difference]: Start difference. First operand 1009 states and 1771 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:15:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:02,794 INFO L93 Difference]: Finished difference Result 2608 states and 4579 transitions. [2021-11-07 01:15:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:15:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:02,805 INFO L225 Difference]: With dead ends: 2608 [2021-11-07 01:15:02,805 INFO L226 Difference]: Without dead ends: 1683 [2021-11-07 01:15:02,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:15:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-07 01:15:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1214. [2021-11-07 01:15:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1208 states have (on average 1.7773178807947019) internal successors, (2147), 1213 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states 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 01:15:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2147 transitions. [2021-11-07 01:15:02,924 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2147 transitions. Word has length 63 [2021-11-07 01:15:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:02,927 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2147 transitions. [2021-11-07 01:15:02,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:15:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2147 transitions. [2021-11-07 01:15:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:15:02,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:02,930 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] [2021-11-07 01:15:02,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:03,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:03,145 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 01:15:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1288171395, now seen corresponding path program 1 times [2021-11-07 01:15:03,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:03,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217176837] [2021-11-07 01:15:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:03,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:03,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:03,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:15:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:03,798 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 01:15:03,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:03,937 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 01:15:03,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:03,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217176837] [2021-11-07 01:15:03,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217176837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:03,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:03,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120634777] [2021-11-07 01:15:03,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:03,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:03,941 INFO L87 Difference]: Start difference. First operand 1214 states and 2147 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 01:15:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:04,119 INFO L93 Difference]: Finished difference Result 3255 states and 5772 transitions. [2021-11-07 01:15:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:15:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:04,132 INFO L225 Difference]: With dead ends: 3255 [2021-11-07 01:15:04,133 INFO L226 Difference]: Without dead ends: 2133 [2021-11-07 01:15:04,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:15:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-11-07 01:15:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1664. [2021-11-07 01:15:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1658 states have (on average 1.7943305186972256) internal successors, (2975), 1663 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states 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 01:15:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2975 transitions. [2021-11-07 01:15:04,293 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2975 transitions. Word has length 64 [2021-11-07 01:15:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:04,294 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2975 transitions. [2021-11-07 01:15:04,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 01:15:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2975 transitions. [2021-11-07 01:15:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:15:04,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:04,297 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] [2021-11-07 01:15:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:04,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:04,512 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 01:15:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1754038226, now seen corresponding path program 1 times [2021-11-07 01:15:04,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:04,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747583834] [2021-11-07 01:15:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:04,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:04,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:04,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:15:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:05,164 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 01:15:05,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:05,323 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 01:15:05,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:05,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747583834] [2021-11-07 01:15:05,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747583834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:05,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:05,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:05,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844198655] [2021-11-07 01:15:05,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:05,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:05,326 INFO L87 Difference]: Start difference. First operand 1664 states and 2975 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:15:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:05,567 INFO L93 Difference]: Finished difference Result 4585 states and 8225 transitions. [2021-11-07 01:15:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:15:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:05,586 INFO L225 Difference]: With dead ends: 4585 [2021-11-07 01:15:05,586 INFO L226 Difference]: Without dead ends: 3021 [2021-11-07 01:15:05,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:15:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-07 01:15:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2552. [2021-11-07 01:15:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2546 states have (on average 1.8106834249803614) internal successors, (4610), 2551 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states 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 01:15:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4610 transitions. [2021-11-07 01:15:05,811 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4610 transitions. Word has length 65 [2021-11-07 01:15:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:05,812 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4610 transitions. [2021-11-07 01:15:05,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:15:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4610 transitions. [2021-11-07 01:15:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:15:05,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:05,817 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] [2021-11-07 01:15:05,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:06,037 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 01:15:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash 546495826, now seen corresponding path program 1 times [2021-11-07 01:15:06,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:06,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618765463] [2021-11-07 01:15:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:06,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:06,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:06,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:06,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:15:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:06,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:06,677 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 01:15:06,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:06,837 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 01:15:06,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:06,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618765463] [2021-11-07 01:15:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618765463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:06,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:06,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340029342] [2021-11-07 01:15:06,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:06,840 INFO L87 Difference]: Start difference. First operand 2552 states and 4610 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:15:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:07,158 INFO L93 Difference]: Finished difference Result 6985 states and 12649 transitions. [2021-11-07 01:15:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:07,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:15:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:07,186 INFO L225 Difference]: With dead ends: 6985 [2021-11-07 01:15:07,187 INFO L226 Difference]: Without dead ends: 4567 [2021-11-07 01:15:07,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:15:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-11-07 01:15:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4098. [2021-11-07 01:15:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4092 states have (on average 1.8218475073313782) internal successors, (7455), 4097 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states 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 01:15:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 7455 transitions. [2021-11-07 01:15:07,466 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 7455 transitions. Word has length 66 [2021-11-07 01:15:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:07,467 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 7455 transitions. [2021-11-07 01:15:07,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:15:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 7455 transitions. [2021-11-07 01:15:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:15:07,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:07,517 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 01:15:07,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:07,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:07,718 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 01:15:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1955303939, now seen corresponding path program 1 times [2021-11-07 01:15:07,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:07,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089068928] [2021-11-07 01:15:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:07,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:07,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:07,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:15:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:08,386 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 01:15:08,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:08,534 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 01:15:08,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:08,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089068928] [2021-11-07 01:15:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089068928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:08,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:08,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:08,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855172965] [2021-11-07 01:15:08,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:08,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:08,538 INFO L87 Difference]: Start difference. First operand 4098 states and 7455 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 01:15:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:09,009 INFO L93 Difference]: Finished difference Result 11339 states and 20667 transitions. [2021-11-07 01:15:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:09,010 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 01:15:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:09,047 INFO L225 Difference]: With dead ends: 11339 [2021-11-07 01:15:09,048 INFO L226 Difference]: Without dead ends: 7409 [2021-11-07 01:15:09,054 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 01:15:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-11-07 01:15:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 6940. [2021-11-07 01:15:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6934 states have (on average 1.8286703201615229) internal successors, (12680), 6939 states have internal predecessors, (12680), 0 states have call successors, (0), 0 states 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 01:15:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 12680 transitions. [2021-11-07 01:15:09,517 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 12680 transitions. Word has length 67 [2021-11-07 01:15:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:09,518 INFO L470 AbstractCegarLoop]: Abstraction has 6940 states and 12680 transitions. [2021-11-07 01:15:09,519 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 01:15:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 12680 transitions. [2021-11-07 01:15:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:15:09,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:09,525 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 01:15:09,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:09,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:09,740 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 01:15:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -323997, now seen corresponding path program 1 times [2021-11-07 01:15:09,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:09,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274578697] [2021-11-07 01:15:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:09,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:09,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:09,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:09,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:15:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:10,444 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 01:15:10,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:10,601 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 01:15:10,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:10,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274578697] [2021-11-07 01:15:10,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274578697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:10,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:10,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:10,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220127085] [2021-11-07 01:15:10,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:10,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:10,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:10,603 INFO L87 Difference]: Start difference. First operand 6940 states and 12680 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 01:15:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:11,275 INFO L93 Difference]: Finished difference Result 20323 states and 37184 transitions. [2021-11-07 01:15:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:11,275 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 01:15:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:11,322 INFO L225 Difference]: With dead ends: 20323 [2021-11-07 01:15:11,322 INFO L226 Difference]: Without dead ends: 13555 [2021-11-07 01:15:11,334 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 01:15:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13555 states. [2021-11-07 01:15:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13555 to 13086. [2021-11-07 01:15:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13080 states have (on average 1.831880733944954) internal successors, (23961), 13085 states have internal predecessors, (23961), 0 states have call successors, (0), 0 states 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 01:15:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 23961 transitions. [2021-11-07 01:15:12,137 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 23961 transitions. Word has length 68 [2021-11-07 01:15:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:12,138 INFO L470 AbstractCegarLoop]: Abstraction has 13086 states and 23961 transitions. [2021-11-07 01:15:12,138 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 01:15:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 23961 transitions. [2021-11-07 01:15:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:15:12,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:12,146 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:12,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:12,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:12,361 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 01:15:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1572089971, now seen corresponding path program 1 times [2021-11-07 01:15:12,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:12,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776325617] [2021-11-07 01:15:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:12,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:12,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:12,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:15:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:15:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:15:13,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:13,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776325617] [2021-11-07 01:15:13,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776325617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:13,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:15:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036223792] [2021-11-07 01:15:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:15:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:15:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:15:13,299 INFO L87 Difference]: Start difference. First operand 13086 states and 23961 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 01:15:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:16,419 INFO L93 Difference]: Finished difference Result 32427 states and 59374 transitions. [2021-11-07 01:15:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:15:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 01:15:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:16,477 INFO L225 Difference]: With dead ends: 32427 [2021-11-07 01:15:16,478 INFO L226 Difference]: Without dead ends: 19634 [2021-11-07 01:15:16,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:15:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19634 states. [2021-11-07 01:15:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19634 to 13053. [2021-11-07 01:15:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13053 states, 13047 states have (on average 1.826396872844332) internal successors, (23829), 13052 states have internal predecessors, (23829), 0 states have call successors, (0), 0 states 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 01:15:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13053 states to 13053 states and 23829 transitions. [2021-11-07 01:15:17,301 INFO L78 Accepts]: Start accepts. Automaton has 13053 states and 23829 transitions. Word has length 69 [2021-11-07 01:15:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:17,301 INFO L470 AbstractCegarLoop]: Abstraction has 13053 states and 23829 transitions. [2021-11-07 01:15:17,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 01:15:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 13053 states and 23829 transitions. [2021-11-07 01:15:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:15:17,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:17,308 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 01:15:17,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:17,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:17,523 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 01:15:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1828593422, now seen corresponding path program 1 times [2021-11-07 01:15:17,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:17,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223251089] [2021-11-07 01:15:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:17,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:17,526 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:17,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:15:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:18,287 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 01:15:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:18,461 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 01:15:18,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:18,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223251089] [2021-11-07 01:15:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223251089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:18,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:18,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:18,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321351215] [2021-11-07 01:15:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:18,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:18,463 INFO L87 Difference]: Start difference. First operand 13053 states and 23829 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 01:15:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:19,314 INFO L93 Difference]: Finished difference Result 38366 states and 70114 transitions. [2021-11-07 01:15:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:19,315 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 01:15:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:19,367 INFO L225 Difference]: With dead ends: 38366 [2021-11-07 01:15:19,368 INFO L226 Difference]: Without dead ends: 25492 [2021-11-07 01:15:19,387 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 01:15:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25492 states. [2021-11-07 01:15:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25492 to 25023. [2021-11-07 01:15:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25023 states, 25017 states have (on average 1.8274773154255106) internal successors, (45718), 25022 states have internal predecessors, (45718), 0 states have call successors, (0), 0 states 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 01:15:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25023 states to 25023 states and 45718 transitions. [2021-11-07 01:15:20,847 INFO L78 Accepts]: Start accepts. Automaton has 25023 states and 45718 transitions. Word has length 69 [2021-11-07 01:15:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:20,848 INFO L470 AbstractCegarLoop]: Abstraction has 25023 states and 45718 transitions. [2021-11-07 01:15:20,848 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 01:15:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 25023 states and 45718 transitions. [2021-11-07 01:15:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:15:20,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:20,859 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 01:15:20,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:21,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:21,079 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 01:15:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash 850318885, now seen corresponding path program 1 times [2021-11-07 01:15:21,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:21,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290476854] [2021-11-07 01:15:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:21,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:21,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:21,082 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:21,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:15:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:21,912 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 01:15:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:22,086 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 01:15:22,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:22,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290476854] [2021-11-07 01:15:22,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290476854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:22,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:22,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:22,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37853278] [2021-11-07 01:15:22,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:22,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:22,089 INFO L87 Difference]: Start difference. First operand 25023 states and 45718 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 01:15:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:23,652 INFO L93 Difference]: Finished difference Result 68915 states and 125517 transitions. [2021-11-07 01:15:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:23,653 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 01:15:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:23,715 INFO L225 Difference]: With dead ends: 68915 [2021-11-07 01:15:23,715 INFO L226 Difference]: Without dead ends: 44118 [2021-11-07 01:15:23,742 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 01:15:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44118 states. [2021-11-07 01:15:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44118 to 43649. [2021-11-07 01:15:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43649 states, 43643 states have (on average 1.815984235730816) internal successors, (79255), 43648 states have internal predecessors, (79255), 0 states have call successors, (0), 0 states 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 01:15:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43649 states to 43649 states and 79255 transitions. [2021-11-07 01:15:26,321 INFO L78 Accepts]: Start accepts. Automaton has 43649 states and 79255 transitions. Word has length 70 [2021-11-07 01:15:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:26,321 INFO L470 AbstractCegarLoop]: Abstraction has 43649 states and 79255 transitions. [2021-11-07 01:15:26,321 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 01:15:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43649 states and 79255 transitions. [2021-11-07 01:15:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:15:26,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:26,328 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] [2021-11-07 01:15:26,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:26,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:26,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:15:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1079437625, now seen corresponding path program 1 times [2021-11-07 01:15:26,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:26,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95461365] [2021-11-07 01:15:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:26,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:26,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:26,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:15:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:27,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:27,466 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 01:15:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:27,693 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 01:15:27,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:27,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95461365] [2021-11-07 01:15:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95461365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:27,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:27,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:15:27,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345668212] [2021-11-07 01:15:27,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:15:27,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:15:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:15:27,695 INFO L87 Difference]: Start difference. First operand 43649 states and 79255 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:15:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:34,823 INFO L93 Difference]: Finished difference Result 169876 states and 308342 transitions. [2021-11-07 01:15:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:15:34,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 01:15:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:35,028 INFO L225 Difference]: With dead ends: 169876 [2021-11-07 01:15:35,028 INFO L226 Difference]: Without dead ends: 126519 [2021-11-07 01:15:35,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 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 01:15:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126519 states. [2021-11-07 01:15:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126519 to 43391. [2021-11-07 01:15:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43391 states, 43385 states have (on average 1.802996427336637) internal successors, (78223), 43390 states have internal predecessors, (78223), 0 states have call successors, (0), 0 states 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 01:15:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43391 states to 43391 states and 78223 transitions. [2021-11-07 01:15:38,241 INFO L78 Accepts]: Start accepts. Automaton has 43391 states and 78223 transitions. Word has length 71 [2021-11-07 01:15:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:38,241 INFO L470 AbstractCegarLoop]: Abstraction has 43391 states and 78223 transitions. [2021-11-07 01:15:38,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:15:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43391 states and 78223 transitions. [2021-11-07 01:15:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:15:38,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:38,248 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:38,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:38,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:38,454 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:15:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 752074199, now seen corresponding path program 1 times [2021-11-07 01:15:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:38,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278296227] [2021-11-07 01:15:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:38,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:38,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:38,456 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:38,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:15:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:15:39,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:15:39,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278296227] [2021-11-07 01:15:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278296227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:39,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:15:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349747399] [2021-11-07 01:15:39,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:15:39,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:15:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:15:39,602 INFO L87 Difference]: Start difference. First operand 43391 states and 78223 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:41,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:41,492 INFO L93 Difference]: Finished difference Result 86953 states and 156737 transitions. [2021-11-07 01:15:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:41,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:15:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:41,556 INFO L225 Difference]: With dead ends: 86953 [2021-11-07 01:15:41,556 INFO L226 Difference]: Without dead ends: 43860 [2021-11-07 01:15:41,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:15:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43860 states. [2021-11-07 01:15:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43860 to 43391. [2021-11-07 01:15:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43391 states, 43385 states have (on average 1.800046098882102) internal successors, (78095), 43390 states have internal predecessors, (78095), 0 states have call successors, (0), 0 states 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 01:15:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43391 states to 43391 states and 78095 transitions. [2021-11-07 01:15:43,627 INFO L78 Accepts]: Start accepts. Automaton has 43391 states and 78095 transitions. Word has length 71 [2021-11-07 01:15:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:43,627 INFO L470 AbstractCegarLoop]: Abstraction has 43391 states and 78095 transitions. [2021-11-07 01:15:43,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 43391 states and 78095 transitions. [2021-11-07 01:15:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:15:43,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:43,632 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 01:15:43,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:43,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:43,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:15:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1524593220, now seen corresponding path program 1 times [2021-11-07 01:15:43,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:43,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807056687] [2021-11-07 01:15:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:43,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:43,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:43,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e62d7cfe-e644-49d0-8391-fd8015a71ace/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:15:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:44,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:44,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:44,661 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 01:15:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:44,817 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 01:15:44,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:44,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807056687] [2021-11-07 01:15:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807056687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:44,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:15:44,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018248000] [2021-11-07 01:15:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:15:44,821 INFO L87 Difference]: Start difference. First operand 43391 states and 78095 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 01:15:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:48,151 INFO L93 Difference]: Finished difference Result 121683 states and 218763 transitions. [2021-11-07 01:15:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:48,151 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 01:15:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:48,267 INFO L225 Difference]: With dead ends: 121683 [2021-11-07 01:15:48,267 INFO L226 Difference]: Without dead ends: 78550 [2021-11-07 01:15:48,289 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 01:15:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78550 states.