./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product30.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_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/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_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/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_8a96cefd-b44f-4ac9-875c-3bb244520087/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 c07a23e40b849b33d08a88f08826cd6b68b33a2f2aee4edabb68f594c2a0aef6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:59,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:59,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:59,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:59,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:59,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:59,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:59,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:59,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:59,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:59,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:59,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:59,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:59,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:59,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:59,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:59,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:59,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:59,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:59,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:59,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:59,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:59,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:59,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:59,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:59,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:59,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:59,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:59,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:59,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:59,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:59,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:59,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:59,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:59,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:59,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:59,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:59,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:59,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:59,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:59,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:59,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:09:59,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:59,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:59,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:59,565 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:59,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:59,565 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:59,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:59,566 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:59,574 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:59,574 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:59,575 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:59,575 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:59,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:59,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:59,576 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:59,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:59,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:59,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:59,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:59,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:59,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:59,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:59,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:59,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:59,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:59,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:59,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:59,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:59,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:59,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:59,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:59,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:59,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:59,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:59,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:59,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:59,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:59,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:59,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:59,586 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_8a96cefd-b44f-4ac9-875c-3bb244520087/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c07a23e40b849b33d08a88f08826cd6b68b33a2f2aee4edabb68f594c2a0aef6 [2021-11-07 02:09:59,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:59,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:59,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:59,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:59,918 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:59,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product30.cil.c [2021-11-07 02:09:59,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/e4026a826/fd74222c286142b692b3b018101e98cc/FLAG544f4e8f8 [2021-11-07 02:10:00,796 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:10:00,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c [2021-11-07 02:10:00,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/e4026a826/fd74222c286142b692b3b018101e98cc/FLAG544f4e8f8 [2021-11-07 02:10:00,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/e4026a826/fd74222c286142b692b3b018101e98cc [2021-11-07 02:10:00,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:10:00,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:10:00,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:00,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:10:00,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:10:00,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:00" (1/1) ... [2021-11-07 02:10:00,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13769657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:00, skipping insertion in model container [2021-11-07 02:10:00,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:00" (1/1) ... [2021-11-07 02:10:00,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:10:01,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:10:01,810 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_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c[58327,58340] [2021-11-07 02:10:01,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:01,852 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:10:01,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17fc1868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:01, skipping insertion in model container [2021-11-07 02:10:01,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:01,856 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:10:01,859 INFO L168 Benchmark]: Toolchain (without parser) took 933.86 ms. Allocated memory is still 113.2 MB. Free memory was 73.6 MB in the beginning and 74.8 MB in the end (delta: -1.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:10:01,861 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 113.2 MB. Free memory is still 92.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:01,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 929.69 ms. Allocated memory is still 113.2 MB. Free memory was 73.3 MB in the beginning and 74.8 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:10:01,864 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 113.2 MB. Free memory is still 92.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 929.69 ms. Allocated memory is still 113.2 MB. Free memory was 73.3 MB in the beginning and 74.8 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 569]: 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_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/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_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/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_8a96cefd-b44f-4ac9-875c-3bb244520087/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 c07a23e40b849b33d08a88f08826cd6b68b33a2f2aee4edabb68f594c2a0aef6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:10:04,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:10:04,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:10:04,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:10:04,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:10:04,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:10:04,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:10:04,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:10:04,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:10:04,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:10:04,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:10:04,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:10:04,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:10:04,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:10:04,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:10:04,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:10:04,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:10:04,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:10:04,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:10:04,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:10:04,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:10:04,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:10:04,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:10:04,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:10:04,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:10:04,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:10:04,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:10:04,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:10:04,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:10:04,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:10:04,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:10:04,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:10:04,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:10:04,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:10:04,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:10:04,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:10:04,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:10:04,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:10:04,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:10:04,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:10:04,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:10:04,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:10:04,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:10:04,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:10:04,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:10:04,512 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:10:04,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:10:04,513 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:10:04,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:10:04,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:10:04,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:10:04,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:10:04,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:10:04,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:10:04,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:10:04,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:10:04,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:10:04,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:10:04,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:10:04,518 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:10:04,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:10:04,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:10:04,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:10:04,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:10:04,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:10:04,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:10:04,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:10:04,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:10:04,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:04,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:10:04,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:10:04,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:10:04,522 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:10:04,522 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:04,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:10:04,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:10:04,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:10:04,524 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_8a96cefd-b44f-4ac9-875c-3bb244520087/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c07a23e40b849b33d08a88f08826cd6b68b33a2f2aee4edabb68f594c2a0aef6 [2021-11-07 02:10:04,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:10:04,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:10:04,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:10:04,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:10:04,985 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:10:04,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product30.cil.c [2021-11-07 02:10:05,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/687074432/bafbb46a055d477aa563126d70b1581e/FLAGc8abcd870 [2021-11-07 02:10:05,798 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:10:05,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c [2021-11-07 02:10:05,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/687074432/bafbb46a055d477aa563126d70b1581e/FLAGc8abcd870 [2021-11-07 02:10:06,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/data/687074432/bafbb46a055d477aa563126d70b1581e [2021-11-07 02:10:06,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:10:06,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:10:06,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:06,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:10:06,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:10:06,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab236d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06, skipping insertion in model container [2021-11-07 02:10:06,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:10:06,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:10:06,889 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_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c[58327,58340] [2021-11-07 02:10:06,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:06,952 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:10:06,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:10:07,116 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_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c[58327,58340] [2021-11-07 02:10:07,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:07,145 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:10:07,263 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_8a96cefd-b44f-4ac9-875c-3bb244520087/sv-benchmarks/c/product-lines/email_spec1_product30.cil.c[58327,58340] [2021-11-07 02:10:07,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:07,311 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:10:07,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07 WrapperNode [2021-11-07 02:10:07,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:07,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:07,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:10:07,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:10:07,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:07,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:10:07,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:10:07,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:10:07,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:10:07,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:10:07,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:10:07,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:10:07,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (1/1) ... [2021-11-07 02:10:07,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:07,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:10:07,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:10:07,822 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:10:07,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:10:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:10:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:10:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:10:12,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:10:12,548 INFO L299 CfgBuilder]: Removed 319 assume(true) statements. [2021-11-07 02:10:12,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:12 BoogieIcfgContainer [2021-11-07 02:10:12,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:10:12,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:10:12,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:10:12,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:10:12,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:10:06" (1/3) ... [2021-11-07 02:10:12,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4347a24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:12, skipping insertion in model container [2021-11-07 02:10:12,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:07" (2/3) ... [2021-11-07 02:10:12,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4347a24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:12, skipping insertion in model container [2021-11-07 02:10:12,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:12" (3/3) ... [2021-11-07 02:10:12,564 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product30.cil.c [2021-11-07 02:10:12,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:10:12,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:10:12,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:10:12,644 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:10:12,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:10:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 503 states, 500 states have (on average 1.76) internal successors, (880), 502 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:10:12,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:12,690 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 02:10:12,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275253, now seen corresponding path program 1 times [2021-11-07 02:10:12,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:12,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872606853] [2021-11-07 02:10:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:12,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:12,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:12,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:12,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:10:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:10:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:13,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:13,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:13,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872606853] [2021-11-07 02:10:13,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872606853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:13,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:13,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:10:13,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600580442] [2021-11-07 02:10:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:10:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:10:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:10:13,622 INFO L87 Difference]: Start difference. First operand has 503 states, 500 states have (on average 1.76) internal successors, (880), 502 states have internal predecessors, (880), 0 states have call successors, (0), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:13,688 INFO L93 Difference]: Finished difference Result 764 states and 1319 transitions. [2021-11-07 02:10:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:10:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:10:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:13,718 INFO L225 Difference]: With dead ends: 764 [2021-11-07 02:10:13,722 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 02:10:13,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 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 02:10:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 02:10:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-11-07 02:10:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7571428571428571) internal successors, (738), 421 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 738 transitions. [2021-11-07 02:10:13,806 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 738 transitions. Word has length 45 [2021-11-07 02:10:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:13,807 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 738 transitions. [2021-11-07 02:10:13,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 738 transitions. [2021-11-07 02:10:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:10:13,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:13,813 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] [2021-11-07 02:10:13,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:14,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:14,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1548486274, now seen corresponding path program 1 times [2021-11-07 02:10:14,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:14,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369419796] [2021-11-07 02:10:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:14,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:14,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:14,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:10:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:10:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:14,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:14,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:14,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369419796] [2021-11-07 02:10:14,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369419796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:14,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:14,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:14,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781553082] [2021-11-07 02:10:14,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:14,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:14,870 INFO L87 Difference]: Start difference. First operand 422 states and 738 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:15,009 INFO L93 Difference]: Finished difference Result 1236 states and 2166 transitions. [2021-11-07 02:10:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:10:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:15,019 INFO L225 Difference]: With dead ends: 1236 [2021-11-07 02:10:15,019 INFO L226 Difference]: Without dead ends: 829 [2021-11-07 02:10:15,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-07 02:10:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 421. [2021-11-07 02:10:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7494033412887828) internal successors, (733), 420 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 733 transitions. [2021-11-07 02:10:15,063 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 733 transitions. Word has length 46 [2021-11-07 02:10:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:15,064 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 733 transitions. [2021-11-07 02:10:15,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 733 transitions. [2021-11-07 02:10:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:10:15,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:15,069 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 02:10:15,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:15,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:15,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1841528872, now seen corresponding path program 1 times [2021-11-07 02:10:15,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:15,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511589530] [2021-11-07 02:10:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:15,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:15,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:15,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:15,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:10:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:15,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:15,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:16,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:16,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511589530] [2021-11-07 02:10:16,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511589530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:16,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:16,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:16,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182786599] [2021-11-07 02:10:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:16,092 INFO L87 Difference]: Start difference. First operand 421 states and 733 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:16,335 INFO L93 Difference]: Finished difference Result 1601 states and 2794 transitions. [2021-11-07 02:10:16,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:16,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 02:10:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:16,346 INFO L225 Difference]: With dead ends: 1601 [2021-11-07 02:10:16,347 INFO L226 Difference]: Without dead ends: 1198 [2021-11-07 02:10:16,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 02:10:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-07 02:10:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 420. [2021-11-07 02:10:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.744019138755981) internal successors, (729), 419 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 729 transitions. [2021-11-07 02:10:16,387 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 729 transitions. Word has length 48 [2021-11-07 02:10:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:16,388 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 729 transitions. [2021-11-07 02:10:16,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 729 transitions. [2021-11-07 02:10:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:10:16,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:16,391 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 02:10:16,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:16,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:16,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -51860187, now seen corresponding path program 1 times [2021-11-07 02:10:16,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:16,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840209432] [2021-11-07 02:10:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:16,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:16,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:16,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:16,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:10:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:10:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:17,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:17,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840209432] [2021-11-07 02:10:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840209432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:17,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:17,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:17,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634964641] [2021-11-07 02:10:17,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:17,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:17,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:17,314 INFO L87 Difference]: Start difference. First operand 420 states and 729 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 02:10:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:17,407 INFO L93 Difference]: Finished difference Result 837 states and 1455 transitions. [2021-11-07 02:10:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 49 [2021-11-07 02:10:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:17,412 INFO L225 Difference]: With dead ends: 837 [2021-11-07 02:10:17,412 INFO L226 Difference]: Without dead ends: 425 [2021-11-07 02:10:17,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-07 02:10:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2021-11-07 02:10:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.736842105263158) internal successors, (726), 419 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 726 transitions. [2021-11-07 02:10:17,446 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 726 transitions. Word has length 49 [2021-11-07 02:10:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:17,446 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 726 transitions. [2021-11-07 02:10:17,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 02:10:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 726 transitions. [2021-11-07 02:10:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:10:17,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:17,450 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] [2021-11-07 02:10:17,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 02:10:17,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:17,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1748708848, now seen corresponding path program 1 times [2021-11-07 02:10:17,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:17,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473688102] [2021-11-07 02:10:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:17,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:17,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:10:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:10:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:18,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:18,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:18,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473688102] [2021-11-07 02:10:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473688102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:18,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:18,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:18,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286406530] [2021-11-07 02:10:18,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:18,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:18,528 INFO L87 Difference]: Start difference. First operand 420 states and 726 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:18,771 INFO L93 Difference]: Finished difference Result 1588 states and 2770 transitions. [2021-11-07 02:10:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:10:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:18,781 INFO L225 Difference]: With dead ends: 1588 [2021-11-07 02:10:18,782 INFO L226 Difference]: Without dead ends: 1194 [2021-11-07 02:10:18,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 02:10:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-07 02:10:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 420. [2021-11-07 02:10:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.729665071770335) internal successors, (723), 419 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 723 transitions. [2021-11-07 02:10:18,829 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 723 transitions. Word has length 50 [2021-11-07 02:10:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:18,829 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 723 transitions. [2021-11-07 02:10:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 723 transitions. [2021-11-07 02:10:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:10:18,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:18,831 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:18,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:19,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:19,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash -100976939, now seen corresponding path program 1 times [2021-11-07 02:10:19,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:19,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693241042] [2021-11-07 02:10:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:19,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:19,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:19,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:10:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:19,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:19,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:19,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:19,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693241042] [2021-11-07 02:10:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693241042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:19,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:19,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:19,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692838056] [2021-11-07 02:10:19,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:19,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:19,778 INFO L87 Difference]: Start difference. First operand 420 states and 723 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:19,873 INFO L93 Difference]: Finished difference Result 994 states and 1716 transitions. [2021-11-07 02:10:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:10:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:19,881 INFO L225 Difference]: With dead ends: 994 [2021-11-07 02:10:19,881 INFO L226 Difference]: Without dead ends: 814 [2021-11-07 02:10:19,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-07 02:10:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 634. [2021-11-07 02:10:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 632 states have (on average 1.7626582278481013) internal successors, (1114), 633 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1114 transitions. [2021-11-07 02:10:19,939 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1114 transitions. Word has length 52 [2021-11-07 02:10:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:19,940 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1114 transitions. [2021-11-07 02:10:19,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1114 transitions. [2021-11-07 02:10:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:10:19,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:19,943 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 02:10:19,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:20,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:20,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1761048348, now seen corresponding path program 1 times [2021-11-07 02:10:20,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:20,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848969381] [2021-11-07 02:10:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:20,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:20,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:10:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:20,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:21,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:21,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848969381] [2021-11-07 02:10:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848969381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:21,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:21,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:21,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401328918] [2021-11-07 02:10:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:21,038 INFO L87 Difference]: Start difference. First operand 634 states and 1114 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 02:10:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:21,132 INFO L93 Difference]: Finished difference Result 1526 states and 2690 transitions. [2021-11-07 02:10:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:21,132 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 02:10:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:21,140 INFO L225 Difference]: With dead ends: 1526 [2021-11-07 02:10:21,140 INFO L226 Difference]: Without dead ends: 976 [2021-11-07 02:10:21,142 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 02:10:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-07 02:10:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 796. [2021-11-07 02:10:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 794 states have (on average 1.7732997481108312) internal successors, (1408), 795 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1408 transitions. [2021-11-07 02:10:21,218 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1408 transitions. Word has length 64 [2021-11-07 02:10:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:21,219 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1408 transitions. [2021-11-07 02:10:21,219 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 02:10:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1408 transitions. [2021-11-07 02:10:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:10:21,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:21,229 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 02:10:21,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:21,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:21,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1358436123, now seen corresponding path program 1 times [2021-11-07 02:10:21,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:21,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430337817] [2021-11-07 02:10:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:21,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:21,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:21,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:21,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:10:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:22,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:22,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430337817] [2021-11-07 02:10:22,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430337817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:22,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:22,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:22,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116574611] [2021-11-07 02:10:22,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:22,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:22,300 INFO L87 Difference]: Start difference. First operand 796 states and 1408 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 02:10:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:22,432 INFO L93 Difference]: Finished difference Result 2044 states and 3637 transitions. [2021-11-07 02:10:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:22,432 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 02:10:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:22,443 INFO L225 Difference]: With dead ends: 2044 [2021-11-07 02:10:22,443 INFO L226 Difference]: Without dead ends: 1340 [2021-11-07 02:10:22,445 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 02:10:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-11-07 02:10:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1160. [2021-11-07 02:10:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1158 states have (on average 1.7892918825561313) internal successors, (2072), 1159 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 2072 transitions. [2021-11-07 02:10:22,564 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 2072 transitions. Word has length 65 [2021-11-07 02:10:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:22,565 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 2072 transitions. [2021-11-07 02:10:22,565 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 02:10:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 2072 transitions. [2021-11-07 02:10:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:10:22,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:22,568 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 02:10:22,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:22,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:22,784 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash 198533750, now seen corresponding path program 1 times [2021-11-07 02:10:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:22,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614294784] [2021-11-07 02:10:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:22,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:22,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:22,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:10:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:23,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:23,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:23,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:23,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614294784] [2021-11-07 02:10:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614294784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:23,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898704589] [2021-11-07 02:10:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:23,709 INFO L87 Difference]: Start difference. First operand 1160 states and 2072 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 02:10:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:23,878 INFO L93 Difference]: Finished difference Result 3116 states and 5598 transitions. [2021-11-07 02:10:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:23,878 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 02:10:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:23,892 INFO L225 Difference]: With dead ends: 3116 [2021-11-07 02:10:23,892 INFO L226 Difference]: Without dead ends: 2056 [2021-11-07 02:10:23,894 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 02:10:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-11-07 02:10:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1876. [2021-11-07 02:10:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1874 states have (on average 1.803094983991462) internal successors, (3379), 1875 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3379 transitions. [2021-11-07 02:10:24,059 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3379 transitions. Word has length 66 [2021-11-07 02:10:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 3379 transitions. [2021-11-07 02:10:24,060 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 02:10:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3379 transitions. [2021-11-07 02:10:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:10:24,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:24,063 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 02:10:24,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:24,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:24,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:24,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1419425014, now seen corresponding path program 1 times [2021-11-07 02:10:24,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:24,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447847383] [2021-11-07 02:10:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:24,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:24,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:24,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:10:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:24,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:25,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:25,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:25,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447847383] [2021-11-07 02:10:25,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447847383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:25,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:25,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:25,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555833436] [2021-11-07 02:10:25,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:25,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:25,230 INFO L87 Difference]: Start difference. First operand 1876 states and 3379 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 02:10:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:25,472 INFO L93 Difference]: Finished difference Result 5000 states and 9038 transitions. [2021-11-07 02:10:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:25,473 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 02:10:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:25,499 INFO L225 Difference]: With dead ends: 5000 [2021-11-07 02:10:25,499 INFO L226 Difference]: Without dead ends: 3258 [2021-11-07 02:10:25,503 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 02:10:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-11-07 02:10:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3078. [2021-11-07 02:10:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3076 states have (on average 1.8101430429128738) internal successors, (5568), 3077 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 5568 transitions. [2021-11-07 02:10:25,799 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 5568 transitions. Word has length 67 [2021-11-07 02:10:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:25,799 INFO L470 AbstractCegarLoop]: Abstraction has 3078 states and 5568 transitions. [2021-11-07 02:10:25,800 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 02:10:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 5568 transitions. [2021-11-07 02:10:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:10:25,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:25,811 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 02:10:25,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:26,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:26,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2142803557, now seen corresponding path program 1 times [2021-11-07 02:10:26,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:26,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149105220] [2021-11-07 02:10:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:26,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:26,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:26,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:10:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:26,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:27,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:27,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149105220] [2021-11-07 02:10:27,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149105220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:27,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:27,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:27,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341551610] [2021-11-07 02:10:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:27,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:27,026 INFO L87 Difference]: Start difference. First operand 3078 states and 5568 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 02:10:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:27,371 INFO L93 Difference]: Finished difference Result 8322 states and 15088 transitions. [2021-11-07 02:10:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:27,372 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 02:10:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:27,412 INFO L225 Difference]: With dead ends: 8322 [2021-11-07 02:10:27,412 INFO L226 Difference]: Without dead ends: 5412 [2021-11-07 02:10:27,418 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 02:10:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2021-11-07 02:10:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 5232. [2021-11-07 02:10:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 5230 states have (on average 1.812810707456979) internal successors, (9481), 5231 states have internal predecessors, (9481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 9481 transitions. [2021-11-07 02:10:27,884 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 9481 transitions. Word has length 68 [2021-11-07 02:10:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:27,886 INFO L470 AbstractCegarLoop]: Abstraction has 5232 states and 9481 transitions. [2021-11-07 02:10:27,886 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 02:10:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 9481 transitions. [2021-11-07 02:10:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:10:27,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:27,891 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 02:10:27,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:28,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:28,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1647879685, now seen corresponding path program 1 times [2021-11-07 02:10:28,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:28,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088501992] [2021-11-07 02:10:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:28,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:28,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:28,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:10:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:28,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:29,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:29,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088501992] [2021-11-07 02:10:29,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088501992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:29,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:29,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871150423] [2021-11-07 02:10:29,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:29,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:29,066 INFO L87 Difference]: Start difference. First operand 5232 states and 9481 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 02:10:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:29,724 INFO L93 Difference]: Finished difference Result 15242 states and 27669 transitions. [2021-11-07 02:10:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:29,725 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 02:10:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:29,793 INFO L225 Difference]: With dead ends: 15242 [2021-11-07 02:10:29,795 INFO L226 Difference]: Without dead ends: 10182 [2021-11-07 02:10:29,804 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 02:10:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10182 states. [2021-11-07 02:10:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10182 to 10002. [2021-11-07 02:10:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10002 states, 10000 states have (on average 1.8138) internal successors, (18138), 10001 states have internal predecessors, (18138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10002 states to 10002 states and 18138 transitions. [2021-11-07 02:10:30,529 INFO L78 Accepts]: Start accepts. Automaton has 10002 states and 18138 transitions. Word has length 69 [2021-11-07 02:10:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 10002 states and 18138 transitions. [2021-11-07 02:10:30,530 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 02:10:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 10002 states and 18138 transitions. [2021-11-07 02:10:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:10:30,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:30,536 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:30,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:30,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:30,751 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 161506357, now seen corresponding path program 1 times [2021-11-07 02:10:30,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:30,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782017824] [2021-11-07 02:10:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:30,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:30,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:30,754 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:30,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:10:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:31,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:10:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:31,627 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 02:10:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:31,848 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 02:10:31,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:31,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782017824] [2021-11-07 02:10:31,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782017824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:31,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:31,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:31,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146493504] [2021-11-07 02:10:31,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:31,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:31,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:31,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:31,850 INFO L87 Difference]: Start difference. First operand 10002 states and 18138 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:34,892 INFO L93 Difference]: Finished difference Result 24637 states and 44693 transitions. [2021-11-07 02:10:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:10:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:34,940 INFO L225 Difference]: With dead ends: 24637 [2021-11-07 02:10:34,941 INFO L226 Difference]: Without dead ends: 14885 [2021-11-07 02:10:34,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 02:10:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14885 states. [2021-11-07 02:10:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14885 to 9969. [2021-11-07 02:10:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9967 states have (on average 1.8065616534564062) internal successors, (18006), 9968 states have internal predecessors, (18006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 18006 transitions. [2021-11-07 02:10:35,822 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 18006 transitions. Word has length 70 [2021-11-07 02:10:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:35,822 INFO L470 AbstractCegarLoop]: Abstraction has 9969 states and 18006 transitions. [2021-11-07 02:10:35,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 18006 transitions. [2021-11-07 02:10:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:10:35,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:35,832 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 02:10:35,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:36,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:36,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 806102358, now seen corresponding path program 1 times [2021-11-07 02:10:36,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:36,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527837567] [2021-11-07 02:10:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:36,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:36,057 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:36,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:10:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:37,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:37,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:37,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527837567] [2021-11-07 02:10:37,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527837567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:37,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:37,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:37,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626472094] [2021-11-07 02:10:37,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:37,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:37,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:37,339 INFO L87 Difference]: Start difference. First operand 9969 states and 18006 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 02:10:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:38,198 INFO L93 Difference]: Finished difference Result 29157 states and 52727 transitions. [2021-11-07 02:10:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:38,199 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 02:10:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:38,263 INFO L225 Difference]: With dead ends: 29157 [2021-11-07 02:10:38,264 INFO L226 Difference]: Without dead ends: 19367 [2021-11-07 02:10:38,281 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 02:10:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19367 states. [2021-11-07 02:10:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19367 to 19187. [2021-11-07 02:10:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19187 states, 19185 states have (on average 1.8059421422986708) internal successors, (34647), 19186 states have internal predecessors, (34647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19187 states to 19187 states and 34647 transitions. [2021-11-07 02:10:39,421 INFO L78 Accepts]: Start accepts. Automaton has 19187 states and 34647 transitions. Word has length 70 [2021-11-07 02:10:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:39,421 INFO L470 AbstractCegarLoop]: Abstraction has 19187 states and 34647 transitions. [2021-11-07 02:10:39,422 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 02:10:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19187 states and 34647 transitions. [2021-11-07 02:10:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:10:39,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:39,433 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 02:10:39,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:39,648 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2046962045, now seen corresponding path program 1 times [2021-11-07 02:10:39,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:39,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780038156] [2021-11-07 02:10:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:39,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:39,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:39,650 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:39,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:10:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:40,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:40,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780038156] [2021-11-07 02:10:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780038156] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:40,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:40,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103891789] [2021-11-07 02:10:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:40,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:40,679 INFO L87 Difference]: Start difference. First operand 19187 states and 34647 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 02:10:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:42,100 INFO L93 Difference]: Finished difference Result 56997 states and 102964 transitions. [2021-11-07 02:10:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:42,100 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 02:10:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:42,175 INFO L225 Difference]: With dead ends: 56997 [2021-11-07 02:10:42,175 INFO L226 Difference]: Without dead ends: 37993 [2021-11-07 02:10:42,201 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 02:10:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37993 states. [2021-11-07 02:10:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37993 to 37813. [2021-11-07 02:10:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37813 states, 37811 states have (on average 1.803284758403639) internal successors, (68184), 37812 states have internal predecessors, (68184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37813 states to 37813 states and 68184 transitions. [2021-11-07 02:10:44,685 INFO L78 Accepts]: Start accepts. Automaton has 37813 states and 68184 transitions. Word has length 71 [2021-11-07 02:10:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 37813 states and 68184 transitions. [2021-11-07 02:10:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37813 states and 68184 transitions. [2021-11-07 02:10:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:10:44,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:44,695 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:44,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:44,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:44,913 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2069152815, now seen corresponding path program 1 times [2021-11-07 02:10:44,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:44,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824972047] [2021-11-07 02:10:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:44,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:44,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:44,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:44,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:10:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:10:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:45,928 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 02:10:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:46,158 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 02:10:46,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:46,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824972047] [2021-11-07 02:10:46,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824972047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:46,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:46,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:46,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14227697] [2021-11-07 02:10:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:46,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:46,165 INFO L87 Difference]: Start difference. First operand 37813 states and 68184 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:53,011 INFO L93 Difference]: Finished difference Result 146661 states and 264304 transitions. [2021-11-07 02:10:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:10:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:10:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:53,282 INFO L225 Difference]: With dead ends: 146661 [2021-11-07 02:10:53,282 INFO L226 Difference]: Without dead ends: 109097 [2021-11-07 02:10:53,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:10:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109097 states. [2021-11-07 02:10:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109097 to 37555. [2021-11-07 02:10:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37555 states, 37553 states have (on average 1.7881926876680958) internal successors, (67152), 37554 states have internal predecessors, (67152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37555 states to 37555 states and 67152 transitions. [2021-11-07 02:10:56,492 INFO L78 Accepts]: Start accepts. Automaton has 37555 states and 67152 transitions. Word has length 72 [2021-11-07 02:10:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:56,492 INFO L470 AbstractCegarLoop]: Abstraction has 37555 states and 67152 transitions. [2021-11-07 02:10:56,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 37555 states and 67152 transitions. [2021-11-07 02:10:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:10:56,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:56,501 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:56,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:56,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:56,716 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 510821201, now seen corresponding path program 1 times [2021-11-07 02:10:56,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:56,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983564286] [2021-11-07 02:10:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:56,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:56,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:56,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:56,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:10:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:57,606 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 02:10:57,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:57,773 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 02:10:57,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:57,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983564286] [2021-11-07 02:10:57,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983564286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:57,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:57,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:57,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877246587] [2021-11-07 02:10:57,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:57,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:57,776 INFO L87 Difference]: Start difference. First operand 37555 states and 67152 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:59,959 INFO L93 Difference]: Finished difference Result 75035 states and 134184 transitions. [2021-11-07 02:10:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:10:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:00,019 INFO L225 Difference]: With dead ends: 75035 [2021-11-07 02:11:00,019 INFO L226 Difference]: Without dead ends: 37735 [2021-11-07 02:11:00,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37735 states. [2021-11-07 02:11:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37735 to 37555. [2021-11-07 02:11:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37555 states, 37553 states have (on average 1.7847841717039916) internal successors, (67024), 37554 states have internal predecessors, (67024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37555 states to 37555 states and 67024 transitions. [2021-11-07 02:11:02,074 INFO L78 Accepts]: Start accepts. Automaton has 37555 states and 67024 transitions. Word has length 72 [2021-11-07 02:11:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:02,074 INFO L470 AbstractCegarLoop]: Abstraction has 37555 states and 67024 transitions. [2021-11-07 02:11:02,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 37555 states and 67024 transitions. [2021-11-07 02:11:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:11:02,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:02,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:02,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:02,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:02,286 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1675673156, now seen corresponding path program 1 times [2021-11-07 02:11:02,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:02,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233958507] [2021-11-07 02:11:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:02,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:02,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:02,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:02,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:11:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:03,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:03,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:03,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233958507] [2021-11-07 02:11:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233958507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:03,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:03,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:03,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323721363] [2021-11-07 02:11:03,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:03,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:03,459 INFO L87 Difference]: Start difference. First operand 37555 states and 67024 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:06,672 INFO L93 Difference]: Finished difference Result 104261 states and 185714 transitions. [2021-11-07 02:11:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:11:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:06,793 INFO L225 Difference]: With dead ends: 104261 [2021-11-07 02:11:06,793 INFO L226 Difference]: Without dead ends: 66921 [2021-11-07 02:11:06,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66921 states. [2021-11-07 02:11:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66921 to 66741. [2021-11-07 02:11:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66741 states, 66739 states have (on average 1.7752888116393712) internal successors, (118481), 66740 states have internal predecessors, (118481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66741 states to 66741 states and 118481 transitions. [2021-11-07 02:11:11,389 INFO L78 Accepts]: Start accepts. Automaton has 66741 states and 118481 transitions. Word has length 72 [2021-11-07 02:11:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 66741 states and 118481 transitions. [2021-11-07 02:11:11,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 66741 states and 118481 transitions. [2021-11-07 02:11:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:11:11,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:11,397 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:11,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:11,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:11,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1385514165, now seen corresponding path program 1 times [2021-11-07 02:11:11,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:11,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696324989] [2021-11-07 02:11:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:11,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:11,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:11,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:11,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:11:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:11:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:12,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:12,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:12,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696324989] [2021-11-07 02:11:12,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696324989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:12,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521031382] [2021-11-07 02:11:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:12,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:12,880 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:12,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a96cefd-b44f-4ac9-875c-3bb244520087/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:11:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:11:14,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:11:14,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521031382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:14,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:11:14,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:11:14,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873847981] [2021-11-07 02:11:14,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:14,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:11:14,540 INFO L87 Difference]: Start difference. First operand 66741 states and 118481 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)