./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.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_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/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_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/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_006b5e75-c6dd-49ab-88ec-33e4441d3461/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 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:50,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:50,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:50,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:50,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:50,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:50,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:50,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:50,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:50,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:50,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:50,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:50,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:50,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:50,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:50,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:50,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:50,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:50,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:50,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:50,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:50,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:50,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:50,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:50,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:50,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:50,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:50,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:50,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:50,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:50,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:50,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:50,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:50,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:50,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:50,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:50,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:50,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:50,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:50,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:50,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:50,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:23:50,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:50,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:50,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:50,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:50,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:50,470 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:50,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:23:50,471 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:50,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:50,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:23:50,473 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:23:50,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:50,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:23:50,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:23:50,475 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:23:50,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:50,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:50,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:23:50,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:50,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:50,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:23:50,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:50,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:23:50,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:50,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:50,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:23:50,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:50,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:23:50,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:50,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:50,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:50,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:50,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:50,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:23:50,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:23:50,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:23:50,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:23:50,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:50,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:50,485 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 [2021-11-07 02:23:50,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:50,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:50,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:50,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:50,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:50,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-07 02:23:50,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ea48fe569/a242b0f798074a76badd42a4da5cb788/FLAG57aeba51f [2021-11-07 02:23:51,808 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:51,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-07 02:23:51,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ea48fe569/a242b0f798074a76badd42a4da5cb788/FLAG57aeba51f [2021-11-07 02:23:51,896 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ea48fe569/a242b0f798074a76badd42a4da5cb788 [2021-11-07 02:23:51,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:51,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:51,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:51,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:51,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:51,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:51" (1/1) ... [2021-11-07 02:23:51,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456386e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:51, skipping insertion in model container [2021-11-07 02:23:51,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:51" (1/1) ... [2021-11-07 02:23:51,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:52,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:52,260 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-07 02:23:52,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:52,724 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 02:23:52,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ef63c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:52, skipping insertion in model container [2021-11-07 02:23:52,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:52,727 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:23:52,731 INFO L168 Benchmark]: Toolchain (without parser) took 828.04 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.8 MB in the beginning and 80.1 MB in the end (delta: -19.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:52,731 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:23:52,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 824.73 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.6 MB in the beginning and 80.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:52,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 824.73 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.6 MB in the beginning and 80.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/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_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/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_006b5e75-c6dd-49ab-88ec-33e4441d3461/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 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:55,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:55,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:55,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:55,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:55,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:55,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:55,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:55,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:55,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:55,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:55,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:55,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:55,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:55,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:55,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:55,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:55,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:55,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:55,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:55,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:55,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:55,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:55,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:55,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:55,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:55,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:55,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:55,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:55,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:55,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:55,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:55,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:55,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:55,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:55,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:55,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:55,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:55,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:55,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:55,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:55,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:23:55,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:55,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:55,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:55,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:55,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:55,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:55,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:55,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:55,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:55,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:55,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:55,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:55,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:55,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:23:55,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:55,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:23:55,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:55,720 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:23:55,720 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:23:55,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:55,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:23:55,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:55,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:23:55,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:55,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:23:55,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:55,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:55,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:55,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:55,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:23:55,723 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:23:55,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:55,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:23:55,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:55,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:55,724 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 [2021-11-07 02:23:56,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:56,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:56,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:56,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:56,225 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:56,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-07 02:23:56,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ebab356e4/d4388af4d8524c24a1f2db09d2116a86/FLAGb87e0b410 [2021-11-07 02:23:57,225 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:57,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-07 02:23:57,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ebab356e4/d4388af4d8524c24a1f2db09d2116a86/FLAGb87e0b410 [2021-11-07 02:23:57,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/data/ebab356e4/d4388af4d8524c24a1f2db09d2116a86 [2021-11-07 02:23:57,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:57,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:57,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:57,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:57,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:57,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:57" (1/1) ... [2021-11-07 02:23:57,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758fc249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:57, skipping insertion in model container [2021-11-07 02:23:57,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:57" (1/1) ... [2021-11-07 02:23:57,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:57,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:57,715 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-07 02:23:58,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:58,281 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:23:58,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:58,318 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_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-07 02:23:58,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:58,545 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:23:58,559 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-07 02:23:58,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:58,697 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:23:58,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58 WrapperNode [2021-11-07 02:23:58,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:58,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:58,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:23:58,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:23:58,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:23:58,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:23:59,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:59,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:23:59,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:23:59,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:23:59,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:23:59,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:23:59,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:23:59,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:24:00,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:24:00,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:24:00,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:24:00,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:24:00,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:24:00,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:24:00,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:24:00,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (1/1) ... [2021-11-07 02:24:00,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:00,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:24:00,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:24:01,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:24:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:24:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:24:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:24:26,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:24:26,167 INFO L299 CfgBuilder]: Removed 2191 assume(true) statements. [2021-11-07 02:24:26,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:26 BoogieIcfgContainer [2021-11-07 02:24:26,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:24:26,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:24:26,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:24:26,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:24:26,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:23:57" (1/3) ... [2021-11-07 02:24:26,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346091de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:26, skipping insertion in model container [2021-11-07 02:24:26,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:58" (2/3) ... [2021-11-07 02:24:26,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346091de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:26, skipping insertion in model container [2021-11-07 02:24:26,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:26" (3/3) ... [2021-11-07 02:24:26,191 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2021-11-07 02:24:26,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:24:26,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 02:24:26,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:24:26,318 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 02:24:26,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 02:24:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 9596 states, 9585 states have (on average 1.8877412623891496) internal successors, (18094), 9595 states have internal predecessors, (18094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:24:26,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:26,627 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] [2021-11-07 02:24:26,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash 81408100, now seen corresponding path program 1 times [2021-11-07 02:24:26,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:26,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236160328] [2021-11-07 02:24:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:26,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:26,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:26,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:24:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:27,492 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 02:24:27,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:27,725 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 02:24:27,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:27,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236160328] [2021-11-07 02:24:27,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236160328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:27,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:27,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:27,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754315862] [2021-11-07 02:24:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:27,797 INFO L87 Difference]: Start difference. First operand has 9596 states, 9585 states have (on average 1.8877412623891496) internal successors, (18094), 9595 states have internal predecessors, (18094), 0 states have call successors, (0), 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 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:29,352 INFO L93 Difference]: Finished difference Result 32561 states and 61396 transitions. [2021-11-07 02:24:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:24:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:29,564 INFO L225 Difference]: With dead ends: 32561 [2021-11-07 02:24:29,565 INFO L226 Difference]: Without dead ends: 22961 [2021-11-07 02:24:29,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 02:24:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22961 states. [2021-11-07 02:24:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22961 to 9588. [2021-11-07 02:24:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9588 states, 9578 states have (on average 1.8734600125287115) internal successors, (17944), 9587 states have internal predecessors, (17944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9588 states to 9588 states and 17944 transitions. [2021-11-07 02:24:30,320 INFO L78 Accepts]: Start accepts. Automaton has 9588 states and 17944 transitions. Word has length 58 [2021-11-07 02:24:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:30,321 INFO L470 AbstractCegarLoop]: Abstraction has 9588 states and 17944 transitions. [2021-11-07 02:24:30,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9588 states and 17944 transitions. [2021-11-07 02:24:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:24:30,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:30,331 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] [2021-11-07 02:24:30,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:30,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:30,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2001973618, now seen corresponding path program 1 times [2021-11-07 02:24:30,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:30,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120275119] [2021-11-07 02:24:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:30,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:30,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:30,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:24:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:31,410 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 02:24:31,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:31,642 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 02:24:31,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:31,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120275119] [2021-11-07 02:24:31,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120275119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:31,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:31,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:31,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434529982] [2021-11-07 02:24:31,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:31,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:31,652 INFO L87 Difference]: Start difference. First operand 9588 states and 17944 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:36,181 INFO L93 Difference]: Finished difference Result 66497 states and 124439 transitions. [2021-11-07 02:24:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:24:36,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:24:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:36,443 INFO L225 Difference]: With dead ends: 66497 [2021-11-07 02:24:36,443 INFO L226 Difference]: Without dead ends: 56928 [2021-11-07 02:24:36,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:24:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56928 states. [2021-11-07 02:24:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56928 to 9577. [2021-11-07 02:24:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9577 states, 9567 states have (on average 1.8714330511132016) internal successors, (17904), 9576 states have internal predecessors, (17904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9577 states to 9577 states and 17904 transitions. [2021-11-07 02:24:37,725 INFO L78 Accepts]: Start accepts. Automaton has 9577 states and 17904 transitions. Word has length 60 [2021-11-07 02:24:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:37,727 INFO L470 AbstractCegarLoop]: Abstraction has 9577 states and 17904 transitions. [2021-11-07 02:24:37,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9577 states and 17904 transitions. [2021-11-07 02:24:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:24:37,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:37,747 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 02:24:37,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:37,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:37,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -391551789, now seen corresponding path program 1 times [2021-11-07 02:24:37,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:37,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018651656] [2021-11-07 02:24:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:37,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:37,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:37,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:24:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:38,745 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 02:24:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:38,980 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 02:24:38,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:38,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018651656] [2021-11-07 02:24:38,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018651656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:38,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:38,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:38,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658075342] [2021-11-07 02:24:38,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:38,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:38,984 INFO L87 Difference]: Start difference. First operand 9577 states and 17904 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:24:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:40,480 INFO L93 Difference]: Finished difference Result 32409 states and 60614 transitions. [2021-11-07 02:24:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 65 [2021-11-07 02:24:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:40,549 INFO L225 Difference]: With dead ends: 32409 [2021-11-07 02:24:40,549 INFO L226 Difference]: Without dead ends: 22847 [2021-11-07 02:24:40,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 02:24:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22847 states. [2021-11-07 02:24:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22847 to 9573. [2021-11-07 02:24:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9573 states, 9563 states have (on average 1.8706472864163965) internal successors, (17889), 9572 states have internal predecessors, (17889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 17889 transitions. [2021-11-07 02:24:41,252 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 17889 transitions. Word has length 65 [2021-11-07 02:24:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:41,252 INFO L470 AbstractCegarLoop]: Abstraction has 9573 states and 17889 transitions. [2021-11-07 02:24:41,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:24:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 17889 transitions. [2021-11-07 02:24:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:24:41,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:41,259 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 02:24:41,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:41,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1964702059, now seen corresponding path program 1 times [2021-11-07 02:24:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:41,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892110805] [2021-11-07 02:24:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:41,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:41,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:41,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:24:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:24:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:42,251 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 02:24:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:42,506 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 02:24:42,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:42,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892110805] [2021-11-07 02:24:42,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892110805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:42,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:42,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:24:42,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579252143] [2021-11-07 02:24:42,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:24:42,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:24:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:24:42,510 INFO L87 Difference]: Start difference. First operand 9573 states and 17889 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:49,403 INFO L93 Difference]: Finished difference Result 104421 states and 195348 transitions. [2021-11-07 02:24:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 02:24:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:24:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:49,953 INFO L225 Difference]: With dead ends: 104421 [2021-11-07 02:24:49,954 INFO L226 Difference]: Without dead ends: 94868 [2021-11-07 02:24:49,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:24:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94868 states. [2021-11-07 02:24:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94868 to 9586. [2021-11-07 02:24:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 9576 states have (on average 1.8689431913116124) internal successors, (17897), 9585 states have internal predecessors, (17897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 17897 transitions. [2021-11-07 02:24:51,382 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 17897 transitions. Word has length 67 [2021-11-07 02:24:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:51,382 INFO L470 AbstractCegarLoop]: Abstraction has 9586 states and 17897 transitions. [2021-11-07 02:24:51,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 17897 transitions. [2021-11-07 02:24:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:24:51,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:51,393 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 02:24:51,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:51,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:51,594 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1260254660, now seen corresponding path program 1 times [2021-11-07 02:24:51,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:51,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660160011] [2021-11-07 02:24:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:51,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:51,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:51,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:51,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:24:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:52,484 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 02:24:52,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:52,719 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 02:24:52,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:52,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660160011] [2021-11-07 02:24:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660160011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:52,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487409250] [2021-11-07 02:24:52,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:52,723 INFO L87 Difference]: Start difference. First operand 9586 states and 17897 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:56,071 INFO L93 Difference]: Finished difference Result 66483 states and 124319 transitions. [2021-11-07 02:24:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:24:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:24:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:56,215 INFO L225 Difference]: With dead ends: 66483 [2021-11-07 02:24:56,215 INFO L226 Difference]: Without dead ends: 56949 [2021-11-07 02:24:56,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 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 02:24:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56949 states. [2021-11-07 02:24:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56949 to 9598. [2021-11-07 02:24:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9588 states have (on average 1.8678556528994577) internal successors, (17909), 9597 states have internal predecessors, (17909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 17909 transitions. [2021-11-07 02:24:57,294 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 17909 transitions. Word has length 71 [2021-11-07 02:24:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:57,294 INFO L470 AbstractCegarLoop]: Abstraction has 9598 states and 17909 transitions. [2021-11-07 02:24:57,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 17909 transitions. [2021-11-07 02:24:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:24:57,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:57,302 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 02:24:57,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:24:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1940774615, now seen corresponding path program 1 times [2021-11-07 02:24:57,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:57,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900379110] [2021-11-07 02:24:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:57,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:57,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:57,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:24:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:58,327 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 02:24:58,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:58,535 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 02:24:58,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:58,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900379110] [2021-11-07 02:24:58,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900379110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:58,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:58,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120181562] [2021-11-07 02:24:58,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:58,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:58,542 INFO L87 Difference]: Start difference. First operand 9598 states and 17909 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 02:24:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:59,211 INFO L93 Difference]: Finished difference Result 22938 states and 42850 transitions. [2021-11-07 02:24:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:59,211 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 02:24:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:59,244 INFO L225 Difference]: With dead ends: 22938 [2021-11-07 02:24:59,244 INFO L226 Difference]: Without dead ends: 13368 [2021-11-07 02:24:59,260 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 02:24:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13368 states. [2021-11-07 02:24:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13368 to 9550. [2021-11-07 02:24:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9540 states have (on average 1.868972746331237) internal successors, (17830), 9549 states have internal predecessors, (17830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 17830 transitions. [2021-11-07 02:24:59,855 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 17830 transitions. Word has length 71 [2021-11-07 02:24:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 9550 states and 17830 transitions. [2021-11-07 02:24:59,856 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 02:24:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 17830 transitions. [2021-11-07 02:24:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:24:59,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:59,863 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 02:24:59,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:00,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:00,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1504356180, now seen corresponding path program 1 times [2021-11-07 02:25:00,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:00,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249283254] [2021-11-07 02:25:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:00,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:00,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:00,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:00,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:25:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:00,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:00,804 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 02:25:00,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:01,014 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 02:25:01,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:01,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249283254] [2021-11-07 02:25:01,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249283254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:01,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:01,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:01,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546512313] [2021-11-07 02:25:01,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:01,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:01,017 INFO L87 Difference]: Start difference. First operand 9550 states and 17830 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:01,800 INFO L93 Difference]: Finished difference Result 22885 states and 42756 transitions. [2021-11-07 02:25:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:01,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:25:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:01,825 INFO L225 Difference]: With dead ends: 22885 [2021-11-07 02:25:01,826 INFO L226 Difference]: Without dead ends: 13366 [2021-11-07 02:25:01,839 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 02:25:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13366 states. [2021-11-07 02:25:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13366 to 9547. [2021-11-07 02:25:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 9537 states have (on average 1.8681975463982385) internal successors, (17817), 9546 states have internal predecessors, (17817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 17817 transitions. [2021-11-07 02:25:02,466 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 17817 transitions. Word has length 72 [2021-11-07 02:25:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:02,466 INFO L470 AbstractCegarLoop]: Abstraction has 9547 states and 17817 transitions. [2021-11-07 02:25:02,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 17817 transitions. [2021-11-07 02:25:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:25:02,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:02,473 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:02,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:02,685 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1517928426, now seen corresponding path program 1 times [2021-11-07 02:25:02,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:02,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691956522] [2021-11-07 02:25:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:02,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:02,688 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:02,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:25:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:25:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:03,473 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 02:25:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:03,707 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 02:25:03,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:03,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691956522] [2021-11-07 02:25:03,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691956522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:03,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:03,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:03,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724271745] [2021-11-07 02:25:03,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:03,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:03,711 INFO L87 Difference]: Start difference. First operand 9547 states and 17817 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:06,319 INFO L93 Difference]: Finished difference Result 53367 states and 99739 transitions. [2021-11-07 02:25:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:25:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:25:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:06,390 INFO L225 Difference]: With dead ends: 53367 [2021-11-07 02:25:06,390 INFO L226 Difference]: Without dead ends: 43855 [2021-11-07 02:25:06,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:25:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43855 states. [2021-11-07 02:25:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43855 to 9552. [2021-11-07 02:25:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9552 states, 9542 states have (on average 1.8673234122825404) internal successors, (17818), 9551 states have internal predecessors, (17818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9552 states to 9552 states and 17818 transitions. [2021-11-07 02:25:07,232 INFO L78 Accepts]: Start accepts. Automaton has 9552 states and 17818 transitions. Word has length 73 [2021-11-07 02:25:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:07,233 INFO L470 AbstractCegarLoop]: Abstraction has 9552 states and 17818 transitions. [2021-11-07 02:25:07,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 9552 states and 17818 transitions. [2021-11-07 02:25:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:25:07,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:07,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:07,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:07,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:07,454 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1284757713, now seen corresponding path program 1 times [2021-11-07 02:25:07,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:07,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139770708] [2021-11-07 02:25:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:07,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:07,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:07,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:25:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:08,369 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 02:25:08,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:08,796 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 02:25:08,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:08,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139770708] [2021-11-07 02:25:08,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139770708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:08,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:08,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:25:08,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967319335] [2021-11-07 02:25:08,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:08,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:08,800 INFO L87 Difference]: Start difference. First operand 9552 states and 17818 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:18,542 INFO L93 Difference]: Finished difference Result 33244 states and 61973 transitions. [2021-11-07 02:25:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:25:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:18,578 INFO L225 Difference]: With dead ends: 33244 [2021-11-07 02:25:18,578 INFO L226 Difference]: Without dead ends: 23735 [2021-11-07 02:25:18,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 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 02:25:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23735 states. [2021-11-07 02:25:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23735 to 9552. [2021-11-07 02:25:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9552 states, 9542 states have (on average 1.8083211066862293) internal successors, (17255), 9551 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9552 states to 9552 states and 17255 transitions. [2021-11-07 02:25:19,373 INFO L78 Accepts]: Start accepts. Automaton has 9552 states and 17255 transitions. Word has length 74 [2021-11-07 02:25:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:19,373 INFO L470 AbstractCegarLoop]: Abstraction has 9552 states and 17255 transitions. [2021-11-07 02:25:19,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9552 states and 17255 transitions. [2021-11-07 02:25:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:25:19,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:19,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:19,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:19,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,598 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2005199717, now seen corresponding path program 1 times [2021-11-07 02:25:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:19,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198023170] [2021-11-07 02:25:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:19,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:19,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:19,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:25:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:25:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:20,620 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 02:25:20,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:20,901 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 02:25:20,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198023170] [2021-11-07 02:25:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198023170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:20,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:20,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:25:20,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180367242] [2021-11-07 02:25:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:20,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:20,903 INFO L87 Difference]: Start difference. First operand 9552 states and 17255 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:29,699 INFO L93 Difference]: Finished difference Result 45371 states and 82962 transitions. [2021-11-07 02:25:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:25:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:25:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:29,753 INFO L225 Difference]: With dead ends: 45371 [2021-11-07 02:25:29,753 INFO L226 Difference]: Without dead ends: 35889 [2021-11-07 02:25:29,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:25:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-11-07 02:25:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 13220. [2021-11-07 02:25:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13220 states, 13210 states have (on average 1.8098410295230887) internal successors, (23908), 13219 states have internal predecessors, (23908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13220 states to 13220 states and 23908 transitions. [2021-11-07 02:25:30,779 INFO L78 Accepts]: Start accepts. Automaton has 13220 states and 23908 transitions. Word has length 82 [2021-11-07 02:25:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:30,779 INFO L470 AbstractCegarLoop]: Abstraction has 13220 states and 23908 transitions. [2021-11-07 02:25:30,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 13220 states and 23908 transitions. [2021-11-07 02:25:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:25:30,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:30,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:30,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:25:30,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:30,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1919695678, now seen corresponding path program 1 times [2021-11-07 02:25:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:30,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212275148] [2021-11-07 02:25:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:31,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:31,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:31,001 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:31,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:25:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:31,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:32,324 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 02:25:32,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:34,411 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 02:25:34,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:34,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212275148] [2021-11-07 02:25:34,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212275148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:34,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:34,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:25:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915512619] [2021-11-07 02:25:34,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:34,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:34,415 INFO L87 Difference]: Start difference. First operand 13220 states and 23908 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:41,847 INFO L93 Difference]: Finished difference Result 49065 states and 88908 transitions. [2021-11-07 02:25:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 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 85 [2021-11-07 02:25:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:42,025 INFO L225 Difference]: With dead ends: 49065 [2021-11-07 02:25:42,026 INFO L226 Difference]: Without dead ends: 35907 [2021-11-07 02:25:42,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:25:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-11-07 02:25:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 21601. [2021-11-07 02:25:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21601 states, 21591 states have (on average 1.799221898013061) internal successors, (38847), 21600 states have internal predecessors, (38847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21601 states to 21601 states and 38847 transitions. [2021-11-07 02:25:43,619 INFO L78 Accepts]: Start accepts. Automaton has 21601 states and 38847 transitions. Word has length 85 [2021-11-07 02:25:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:43,619 INFO L470 AbstractCegarLoop]: Abstraction has 21601 states and 38847 transitions. [2021-11-07 02:25:43,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21601 states and 38847 transitions. [2021-11-07 02:25:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:25:43,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:43,623 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:43,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:43,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:43,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:25:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:43,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1741621095, now seen corresponding path program 1 times [2021-11-07 02:25:43,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:43,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591645456] [2021-11-07 02:25:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:43,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:43,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:43,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:25:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:44,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:45,097 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 02:25:45,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:45,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:45,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591645456] [2021-11-07 02:25:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591645456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:45,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:45,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:25:45,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372185366] [2021-11-07 02:25:45,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:25:45,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:25:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:25:45,389 INFO L87 Difference]: Start difference. First operand 21601 states and 38847 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:00,972 INFO L93 Difference]: Finished difference Result 107426 states and 194220 transitions. [2021-11-07 02:26:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:26:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 02:26:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:01,138 INFO L225 Difference]: With dead ends: 107426 [2021-11-07 02:26:01,138 INFO L226 Difference]: Without dead ends: 85886 [2021-11-07 02:26:01,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:26:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85886 states. [2021-11-07 02:26:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85886 to 28017. [2021-11-07 02:26:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28017 states, 28007 states have (on average 1.798014782018781) internal successors, (50357), 28016 states have internal predecessors, (50357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28017 states to 28017 states and 50357 transitions. [2021-11-07 02:26:03,876 INFO L78 Accepts]: Start accepts. Automaton has 28017 states and 50357 transitions. Word has length 86 [2021-11-07 02:26:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:03,877 INFO L470 AbstractCegarLoop]: Abstraction has 28017 states and 50357 transitions. [2021-11-07 02:26:03,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 28017 states and 50357 transitions. [2021-11-07 02:26:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:26:03,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:03,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:03,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:04,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:04,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:26:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1757420832, now seen corresponding path program 1 times [2021-11-07 02:26:04,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:04,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380817871] [2021-11-07 02:26:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:04,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:04,086 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:04,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:26:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:26:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:05,153 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 02:26:05,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:05,442 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 02:26:05,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:05,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380817871] [2021-11-07 02:26:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380817871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:05,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:05,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:26:05,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684887860] [2021-11-07 02:26:05,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:26:05,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:26:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:26:05,444 INFO L87 Difference]: Start difference. First operand 28017 states and 50357 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:20,237 INFO L93 Difference]: Finished difference Result 99136 states and 179913 transitions. [2021-11-07 02:26:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:26:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 02:26:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:20,357 INFO L225 Difference]: With dead ends: 99136 [2021-11-07 02:26:20,357 INFO L226 Difference]: Without dead ends: 71167 [2021-11-07 02:26:20,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71167 states. [2021-11-07 02:26:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71167 to 44817. [2021-11-07 02:26:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44817 states, 44807 states have (on average 1.7639877697681166) internal successors, (79039), 44816 states have internal predecessors, (79039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44817 states to 44817 states and 79039 transitions. [2021-11-07 02:26:24,187 INFO L78 Accepts]: Start accepts. Automaton has 44817 states and 79039 transitions. Word has length 87 [2021-11-07 02:26:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:24,188 INFO L470 AbstractCegarLoop]: Abstraction has 44817 states and 79039 transitions. [2021-11-07 02:26:24,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 44817 states and 79039 transitions. [2021-11-07 02:26:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:26:24,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:24,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:24,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:24,391 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 02:26:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1513650728, now seen corresponding path program 1 times [2021-11-07 02:26:24,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:24,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494696328] [2021-11-07 02:26:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:24,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:24,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:24,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:24,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_006b5e75-c6dd-49ab-88ec-33e4441d3461/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:26:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:26:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:25,608 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 02:26:25,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:25,910 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 02:26:25,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:25,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494696328] [2021-11-07 02:26:25,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494696328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:25,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:25,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:26:25,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146373805] [2021-11-07 02:26:25,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:26:25,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:26:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:25,913 INFO L87 Difference]: Start difference. First operand 44817 states and 79039 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)