./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.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_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/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_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/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_438985af-b115-4fc8-9226-6bff2ec1d990/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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:51,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:51,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:51,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:51,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:51,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:51,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:51,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:51,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:51,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:51,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:51,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:51,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:51,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:51,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:51,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:51,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:51,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:51,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:51,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:51,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:51,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:51,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:51,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:51,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:51,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:51,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:51,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:51,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:51,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:51,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:51,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:51,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:51,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:51,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:51,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:51,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:51,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:51,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:51,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:51,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:51,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:48:51,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:51,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:51,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:51,484 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:51,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:51,485 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:51,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:51,486 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:51,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:51,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:51,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:51,489 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:51,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:51,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:51,490 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:51,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:51,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:51,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:51,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:51,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:51,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:51,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:51,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:51,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:51,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:51,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:51,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:51,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:51,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:51,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:51,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:51,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:51,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:51,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:51,500 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:51,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:51,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:51,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:51,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:51,502 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_438985af-b115-4fc8-9226-6bff2ec1d990/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-07 01:48:51,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:51,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:51,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:51,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:51,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:51,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-07 01:48:52,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/b4c8f3db2/7c8045451353403488e6e4685f8e5d21/FLAGdbe0839b0 [2021-11-07 01:48:52,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:52,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-07 01:48:52,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/b4c8f3db2/7c8045451353403488e6e4685f8e5d21/FLAGdbe0839b0 [2021-11-07 01:48:53,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/b4c8f3db2/7c8045451353403488e6e4685f8e5d21 [2021-11-07 01:48:53,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:53,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:53,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:53,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:53,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:53,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:53" (1/1) ... [2021-11-07 01:48:53,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68477662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:53, skipping insertion in model container [2021-11-07 01:48:53,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:53" (1/1) ... [2021-11-07 01:48:53,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:53,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:53,416 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_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-07 01:48:53,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:53,849 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:48:53,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53866a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:53, skipping insertion in model container [2021-11-07 01:48:53,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:53,850 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:53,853 INFO L168 Benchmark]: Toolchain (without parser) took 832.15 ms. Allocated memory is still 98.6 MB. Free memory was 58.7 MB in the beginning and 59.0 MB in the end (delta: -272.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:53,854 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory was 77.9 MB in the beginning and 77.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:53,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 826.51 ms. Allocated memory is still 98.6 MB. Free memory was 58.5 MB in the beginning and 59.0 MB in the end (delta: -476.7 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:53,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory was 77.9 MB in the beginning and 77.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 826.51 ms. Allocated memory is still 98.6 MB. Free memory was 58.5 MB in the beginning and 59.0 MB in the end (delta: -476.7 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1117]: 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_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/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_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/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_438985af-b115-4fc8-9226-6bff2ec1d990/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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:56,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:56,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:56,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:56,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:56,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:56,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:56,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:56,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:56,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:56,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:56,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:56,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:56,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:56,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:56,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:56,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:56,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:56,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:56,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:56,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:56,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:56,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:56,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:56,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:56,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:56,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:56,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:56,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:56,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:56,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:56,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:56,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:56,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:56,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:56,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:56,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:56,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:56,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:56,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:56,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:56,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:48:56,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:56,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:56,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:56,678 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:56,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:56,678 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:56,679 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:56,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:56,679 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:56,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:56,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:56,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:56,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:56,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:56,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:56,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:56,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:56,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:56,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:56,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:56,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:56,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:56,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:56,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:56,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:56,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:56,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:56,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:56,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:56,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:56,689 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:56,689 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:56,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:56,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:56,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:56,691 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_438985af-b115-4fc8-9226-6bff2ec1d990/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-07 01:48:57,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:57,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:57,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:57,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:57,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:57,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-07 01:48:57,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/611dcd666/1eaa9b6d96754fedb7a8021f9904ec4e/FLAG3487b408e [2021-11-07 01:48:58,310 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:58,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-07 01:48:58,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/611dcd666/1eaa9b6d96754fedb7a8021f9904ec4e/FLAG3487b408e [2021-11-07 01:48:58,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/data/611dcd666/1eaa9b6d96754fedb7a8021f9904ec4e [2021-11-07 01:48:58,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:58,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:58,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:58,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:58,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:58,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:58" (1/1) ... [2021-11-07 01:48:58,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463b5c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:58, skipping insertion in model container [2021-11-07 01:48:58,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:58" (1/1) ... [2021-11-07 01:48:58,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:58,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:58,758 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_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-07 01:48:59,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:59,400 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:59,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:59,424 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_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-07 01:48:59,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:59,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:59,582 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_438985af-b115-4fc8-9226-6bff2ec1d990/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-07 01:48:59,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:59,729 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:59,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59 WrapperNode [2021-11-07 01:48:59,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:59,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:59,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:59,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:59,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:48:59,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:00,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:00,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:00,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:00,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:00,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:00,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:00,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:00,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:00,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:01,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:01,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:01,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:01,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:01,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:01,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:01,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (1/1) ... [2021-11-07 01:49:01,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:01,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:01,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:01,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:01,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:20,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:20,845 INFO L299 CfgBuilder]: Removed 1469 assume(true) statements. [2021-11-07 01:49:20,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:20 BoogieIcfgContainer [2021-11-07 01:49:20,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:20,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:20,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:20,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:20,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:58" (1/3) ... [2021-11-07 01:49:20,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129c38d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:20, skipping insertion in model container [2021-11-07 01:49:20,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59" (2/3) ... [2021-11-07 01:49:20,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129c38d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:20, skipping insertion in model container [2021-11-07 01:49:20,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:20" (3/3) ... [2021-11-07 01:49:20,863 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-11-07 01:49:20,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:20,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:49:20,956 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:20,962 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:49:20,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:49:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 6752 states, 6746 states have (on average 1.898161873702935) internal successors, (12805), 6751 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:49:21,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:21,112 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] [2021-11-07 01:49:21,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2073803296, now seen corresponding path program 1 times [2021-11-07 01:49:21,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:21,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501952898] [2021-11-07 01:49:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:21,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:21,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:21,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:21,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:49:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:21,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:21,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:21,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501952898] [2021-11-07 01:49:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501952898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:21,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:21,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:49:21,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539730772] [2021-11-07 01:49:21,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:49:21,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:49:21,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:21,709 INFO L87 Difference]: Start difference. First operand has 6752 states, 6746 states have (on average 1.898161873702935) internal successors, (12805), 6751 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:21,920 INFO L93 Difference]: Finished difference Result 6771 states and 12828 transitions. [2021-11-07 01:49:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:49:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-07 01:49:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:21,993 INFO L225 Difference]: With dead ends: 6771 [2021-11-07 01:49:21,993 INFO L226 Difference]: Without dead ends: 6748 [2021-11-07 01:49:22,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-11-07 01:49:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6748. [2021-11-07 01:49:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6743 states have (on average 1.897226753670473) internal successors, (12793), 6747 states have internal predecessors, (12793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 12793 transitions. [2021-11-07 01:49:22,506 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 12793 transitions. Word has length 27 [2021-11-07 01:49:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:22,508 INFO L470 AbstractCegarLoop]: Abstraction has 6748 states and 12793 transitions. [2021-11-07 01:49:22,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 12793 transitions. [2021-11-07 01:49:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:49:22,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:22,522 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] [2021-11-07 01:49:22,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:22,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:22,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash -556870769, now seen corresponding path program 1 times [2021-11-07 01:49:22,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:22,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749464620] [2021-11-07 01:49:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:22,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:22,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:22,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:23,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:23,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:23,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749464620] [2021-11-07 01:49:23,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749464620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:23,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:23,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:23,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703816094] [2021-11-07 01:49:23,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:23,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:23,338 INFO L87 Difference]: Start difference. First operand 6748 states and 12793 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:23,755 INFO L93 Difference]: Finished difference Result 13483 states and 25567 transitions. [2021-11-07 01:49:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-07 01:49:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:23,812 INFO L225 Difference]: With dead ends: 13483 [2021-11-07 01:49:23,812 INFO L226 Difference]: Without dead ends: 6748 [2021-11-07 01:49:23,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-11-07 01:49:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6748. [2021-11-07 01:49:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6743 states have (on average 1.8963369420139404) internal successors, (12787), 6747 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 12787 transitions. [2021-11-07 01:49:24,140 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 12787 transitions. Word has length 29 [2021-11-07 01:49:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 6748 states and 12787 transitions. [2021-11-07 01:49:24,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 12787 transitions. [2021-11-07 01:49:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:49:24,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:24,156 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] [2021-11-07 01:49:24,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:24,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:24,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash -675317179, now seen corresponding path program 1 times [2021-11-07 01:49:24,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:24,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175671981] [2021-11-07 01:49:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:24,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:24,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:25,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:25,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175671981] [2021-11-07 01:49:25,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175671981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:25,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:25,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:25,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098428137] [2021-11-07 01:49:25,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:25,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:25,056 INFO L87 Difference]: Start difference. First operand 6748 states and 12787 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:25,769 INFO L93 Difference]: Finished difference Result 13447 states and 25490 transitions. [2021-11-07 01:49:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:25,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 34 [2021-11-07 01:49:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:25,819 INFO L225 Difference]: With dead ends: 13447 [2021-11-07 01:49:25,819 INFO L226 Difference]: Without dead ends: 6721 [2021-11-07 01:49:25,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-07 01:49:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2021-11-07 01:49:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6716 states have (on average 1.895622394282311) internal successors, (12731), 6720 states have internal predecessors, (12731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12731 transitions. [2021-11-07 01:49:26,156 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12731 transitions. Word has length 34 [2021-11-07 01:49:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 12731 transitions. [2021-11-07 01:49:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12731 transitions. [2021-11-07 01:49:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:49:26,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:26,160 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] [2021-11-07 01:49:26,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:26,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 365505635, now seen corresponding path program 1 times [2021-11-07 01:49:26,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:26,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694351149] [2021-11-07 01:49:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:26,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:26,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:26,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:49:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:27,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:27,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694351149] [2021-11-07 01:49:27,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694351149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:27,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:27,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:27,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12893755] [2021-11-07 01:49:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:27,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:27,021 INFO L87 Difference]: Start difference. First operand 6721 states and 12731 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:27,407 INFO L93 Difference]: Finished difference Result 13420 states and 25434 transitions. [2021-11-07 01:49:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 35 [2021-11-07 01:49:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:27,560 INFO L225 Difference]: With dead ends: 13420 [2021-11-07 01:49:27,561 INFO L226 Difference]: Without dead ends: 6721 [2021-11-07 01:49:27,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-07 01:49:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2021-11-07 01:49:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6716 states have (on average 1.8947290053603336) internal successors, (12725), 6720 states have internal predecessors, (12725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12725 transitions. [2021-11-07 01:49:27,925 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12725 transitions. Word has length 35 [2021-11-07 01:49:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:27,926 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 12725 transitions. [2021-11-07 01:49:27,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12725 transitions. [2021-11-07 01:49:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:49:27,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:27,928 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] [2021-11-07 01:49:27,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:28,147 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 180320562, now seen corresponding path program 1 times [2021-11-07 01:49:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:28,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413312184] [2021-11-07 01:49:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:28,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:28,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:28,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:49:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:28,707 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 01:49:28,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:28,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:28,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413312184] [2021-11-07 01:49:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413312184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:28,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:28,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:49:28,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378320903] [2021-11-07 01:49:28,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:28,849 INFO L87 Difference]: Start difference. First operand 6721 states and 12725 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:29,533 INFO L93 Difference]: Finished difference Result 13414 states and 25417 transitions. [2021-11-07 01:49:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:49:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:29,559 INFO L225 Difference]: With dead ends: 13414 [2021-11-07 01:49:29,559 INFO L226 Difference]: Without dead ends: 6718 [2021-11-07 01:49:29,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:49:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2021-11-07 01:49:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6718. [2021-11-07 01:49:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6713 states have (on average 1.8943840309846567) internal successors, (12717), 6717 states have internal predecessors, (12717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 12717 transitions. [2021-11-07 01:49:29,947 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 12717 transitions. Word has length 40 [2021-11-07 01:49:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:29,948 INFO L470 AbstractCegarLoop]: Abstraction has 6718 states and 12717 transitions. [2021-11-07 01:49:29,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 12717 transitions. [2021-11-07 01:49:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:49:29,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:29,951 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] [2021-11-07 01:49:29,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:30,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:30,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1433601694, now seen corresponding path program 1 times [2021-11-07 01:49:30,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:30,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356374373] [2021-11-07 01:49:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:30,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:30,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:30,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:49:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:30,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:30,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:31,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:31,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356374373] [2021-11-07 01:49:31,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356374373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:31,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:31,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:49:31,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129455684] [2021-11-07 01:49:31,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:31,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:31,095 INFO L87 Difference]: Start difference. First operand 6718 states and 12717 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:32,810 INFO L93 Difference]: Finished difference Result 17669 states and 33472 transitions. [2021-11-07 01:49:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:49:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:32,860 INFO L225 Difference]: With dead ends: 17669 [2021-11-07 01:49:32,860 INFO L226 Difference]: Without dead ends: 14268 [2021-11-07 01:49:32,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-11-07 01:49:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 8805. [2021-11-07 01:49:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 8800 states have (on average 1.8945454545454545) internal successors, (16672), 8804 states have internal predecessors, (16672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 16672 transitions. [2021-11-07 01:49:33,290 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 16672 transitions. Word has length 41 [2021-11-07 01:49:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 8805 states and 16672 transitions. [2021-11-07 01:49:33,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 16672 transitions. [2021-11-07 01:49:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:49:33,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:33,299 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] [2021-11-07 01:49:33,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:33,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash -794605999, now seen corresponding path program 1 times [2021-11-07 01:49:33,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:33,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456682535] [2021-11-07 01:49:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:33,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:33,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:33,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:34,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:34,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456682535] [2021-11-07 01:49:34,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456682535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:34,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:34,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:49:34,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646792220] [2021-11-07 01:49:34,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:34,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:34,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:34,366 INFO L87 Difference]: Start difference. First operand 8805 states and 16672 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 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 01:49:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:35,644 INFO L93 Difference]: Finished difference Result 16560 states and 31134 transitions. [2021-11-07 01:49:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:49:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 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 59 [2021-11-07 01:49:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:35,671 INFO L225 Difference]: With dead ends: 16560 [2021-11-07 01:49:35,671 INFO L226 Difference]: Without dead ends: 8929 [2021-11-07 01:49:35,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-11-07 01:49:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 6169. [2021-11-07 01:49:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6164 states have (on average 1.8877352368591824) internal successors, (11636), 6168 states have internal predecessors, (11636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11636 transitions. [2021-11-07 01:49:36,019 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11636 transitions. Word has length 59 [2021-11-07 01:49:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:36,020 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 11636 transitions. [2021-11-07 01:49:36,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 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 01:49:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11636 transitions. [2021-11-07 01:49:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:49:36,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:36,025 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 01:49:36,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:36,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:36,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:36,245 INFO L85 PathProgramCache]: Analyzing trace with hash 556602042, now seen corresponding path program 1 times [2021-11-07 01:49:36,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:36,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779716435] [2021-11-07 01:49:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:36,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:36,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:36,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:49:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:37,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:38,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:38,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779716435] [2021-11-07 01:49:38,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779716435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:38,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:38,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:49:38,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18168320] [2021-11-07 01:49:38,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:38,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:38,438 INFO L87 Difference]: Start difference. First operand 6169 states and 11636 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:42,664 INFO L93 Difference]: Finished difference Result 19668 states and 37161 transitions. [2021-11-07 01:49:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:49:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:42,719 INFO L225 Difference]: With dead ends: 19668 [2021-11-07 01:49:42,720 INFO L226 Difference]: Without dead ends: 13544 [2021-11-07 01:49:42,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13544 states. [2021-11-07 01:49:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13544 to 8549. [2021-11-07 01:49:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8544 states have (on average 1.886938202247191) internal successors, (16122), 8548 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 16122 transitions. [2021-11-07 01:49:43,207 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 16122 transitions. Word has length 60 [2021-11-07 01:49:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:43,210 INFO L470 AbstractCegarLoop]: Abstraction has 8549 states and 16122 transitions. [2021-11-07 01:49:43,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 16122 transitions. [2021-11-07 01:49:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:49:43,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:43,215 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] [2021-11-07 01:49:43,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,435 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2073570190, now seen corresponding path program 1 times [2021-11-07 01:49:43,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:43,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314537636] [2021-11-07 01:49:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:43,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:43,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:43,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:44,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314537636] [2021-11-07 01:49:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314537636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:44,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:44,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:44,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388591843] [2021-11-07 01:49:44,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:49:44,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:49:44,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:44,310 INFO L87 Difference]: Start difference. First operand 8549 states and 16122 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,593 INFO L93 Difference]: Finished difference Result 37218 states and 69913 transitions. [2021-11-07 01:49:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 01:49:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,679 INFO L225 Difference]: With dead ends: 37218 [2021-11-07 01:49:50,679 INFO L226 Difference]: Without dead ends: 28713 [2021-11-07 01:49:50,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28713 states. [2021-11-07 01:49:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28713 to 8563. [2021-11-07 01:49:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8563 states, 8558 states have (on average 1.8854872633792943) internal successors, (16136), 8562 states have internal predecessors, (16136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8563 states to 8563 states and 16136 transitions. [2021-11-07 01:49:51,291 INFO L78 Accepts]: Start accepts. Automaton has 8563 states and 16136 transitions. Word has length 61 [2021-11-07 01:49:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 8563 states and 16136 transitions. [2021-11-07 01:49:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8563 states and 16136 transitions. [2021-11-07 01:49:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:49:51,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:51,296 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] [2021-11-07 01:49:51,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:51,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash -777000072, now seen corresponding path program 1 times [2021-11-07 01:49:51,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:51,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58613999] [2021-11-07 01:49:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:51,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:51,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:51,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:49:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:52,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:52,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:52,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58613999] [2021-11-07 01:49:52,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58613999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:52,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:52,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:52,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019164807] [2021-11-07 01:49:52,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:52,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:52,431 INFO L87 Difference]: Start difference. First operand 8563 states and 16136 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:57,911 INFO L93 Difference]: Finished difference Result 26579 states and 49821 transitions. [2021-11-07 01:49:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-07 01:49:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:57,952 INFO L225 Difference]: With dead ends: 26579 [2021-11-07 01:49:57,952 INFO L226 Difference]: Without dead ends: 18047 [2021-11-07 01:49:57,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-11-07 01:49:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 10696. [2021-11-07 01:49:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10696 states, 10691 states have (on average 1.8480965297914134) internal successors, (19758), 10695 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10696 states to 10696 states and 19758 transitions. [2021-11-07 01:49:58,742 INFO L78 Accepts]: Start accepts. Automaton has 10696 states and 19758 transitions. Word has length 62 [2021-11-07 01:49:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 10696 states and 19758 transitions. [2021-11-07 01:49:58,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10696 states and 19758 transitions. [2021-11-07 01:49:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:49:58,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:58,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:58,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:58,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1382135440, now seen corresponding path program 1 times [2021-11-07 01:49:58,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:58,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280012789] [2021-11-07 01:49:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:58,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:58,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:58,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:49:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:59,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:59,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:59,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280012789] [2021-11-07 01:49:59,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280012789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:59,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:59,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:59,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424073587] [2021-11-07 01:49:59,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:49:59,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:49:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:59,924 INFO L87 Difference]: Start difference. First operand 10696 states and 19758 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:03,468 INFO L93 Difference]: Finished difference Result 75288 states and 139605 transitions. [2021-11-07 01:50:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:50:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:50:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:03,601 INFO L225 Difference]: With dead ends: 75288 [2021-11-07 01:50:03,602 INFO L226 Difference]: Without dead ends: 64632 [2021-11-07 01:50:03,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 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 01:50:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64632 states. [2021-11-07 01:50:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64632 to 17002. [2021-11-07 01:50:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17002 states, 16997 states have (on average 1.849091016061658) internal successors, (31429), 17001 states have internal predecessors, (31429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17002 states to 17002 states and 31429 transitions. [2021-11-07 01:50:05,200 INFO L78 Accepts]: Start accepts. Automaton has 17002 states and 31429 transitions. Word has length 64 [2021-11-07 01:50:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:05,200 INFO L470 AbstractCegarLoop]: Abstraction has 17002 states and 31429 transitions. [2021-11-07 01:50:05,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17002 states and 31429 transitions. [2021-11-07 01:50:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:50:05,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:05,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:05,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:50:05,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:05,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash -385850525, now seen corresponding path program 1 times [2021-11-07 01:50:05,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:05,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654342802] [2021-11-07 01:50:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:05,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:05,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:05,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:05,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:50:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:06,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:06,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:06,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654342802] [2021-11-07 01:50:06,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654342802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:06,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:06,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:50:06,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264072511] [2021-11-07 01:50:06,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:06,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:06,441 INFO L87 Difference]: Start difference. First operand 17002 states and 31429 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:07,661 INFO L93 Difference]: Finished difference Result 44697 states and 82708 transitions. [2021-11-07 01:50:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:50:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:07,713 INFO L225 Difference]: With dead ends: 44697 [2021-11-07 01:50:07,713 INFO L226 Difference]: Without dead ends: 29527 [2021-11-07 01:50:07,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29527 states. [2021-11-07 01:50:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29527 to 29512. [2021-11-07 01:50:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29512 states, 29507 states have (on average 1.8499339139865116) internal successors, (54586), 29511 states have internal predecessors, (54586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29512 states to 29512 states and 54586 transitions. [2021-11-07 01:50:09,434 INFO L78 Accepts]: Start accepts. Automaton has 29512 states and 54586 transitions. Word has length 65 [2021-11-07 01:50:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 29512 states and 54586 transitions. [2021-11-07 01:50:09,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 29512 states and 54586 transitions. [2021-11-07 01:50:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:50:09,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:09,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:09,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:09,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:09,640 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1747585033, now seen corresponding path program 1 times [2021-11-07 01:50:09,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:09,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169742728] [2021-11-07 01:50:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:09,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:09,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:09,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:50:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:10,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:10,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169742728] [2021-11-07 01:50:10,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169742728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:10,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:10,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:50:10,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481542826] [2021-11-07 01:50:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:10,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:10,763 INFO L87 Difference]: Start difference. First operand 29512 states and 54586 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:13,296 INFO L93 Difference]: Finished difference Result 80931 states and 149759 transitions. [2021-11-07 01:50:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:50:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:13,383 INFO L225 Difference]: With dead ends: 80931 [2021-11-07 01:50:13,384 INFO L226 Difference]: Without dead ends: 54368 [2021-11-07 01:50:13,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54368 states. [2021-11-07 01:50:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54368 to 54353. [2021-11-07 01:50:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54353 states, 54348 states have (on average 1.8499300802237433) internal successors, (100540), 54352 states have internal predecessors, (100540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54353 states to 54353 states and 100540 transitions. [2021-11-07 01:50:16,357 INFO L78 Accepts]: Start accepts. Automaton has 54353 states and 100540 transitions. Word has length 66 [2021-11-07 01:50:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:16,358 INFO L470 AbstractCegarLoop]: Abstraction has 54353 states and 100540 transitions. [2021-11-07 01:50:16,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 54353 states and 100540 transitions. [2021-11-07 01:50:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:50:16,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:16,360 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:16,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:16,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:16,576 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash 917173288, now seen corresponding path program 1 times [2021-11-07 01:50:16,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:16,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042373570] [2021-11-07 01:50:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:16,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:16,579 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:16,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:50:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:17,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:17,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:17,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042373570] [2021-11-07 01:50:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042373570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:17,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:17,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:50:17,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228181691] [2021-11-07 01:50:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:17,772 INFO L87 Difference]: Start difference. First operand 54353 states and 100540 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:22,385 INFO L93 Difference]: Finished difference Result 153041 states and 283074 transitions. [2021-11-07 01:50:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:50:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:22,718 INFO L225 Difference]: With dead ends: 153041 [2021-11-07 01:50:22,718 INFO L226 Difference]: Without dead ends: 103645 [2021-11-07 01:50:22,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103645 states. [2021-11-07 01:50:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103645 to 103630. [2021-11-07 01:50:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103630 states, 103625 states have (on average 1.8488588661037395) internal successors, (191588), 103629 states have internal predecessors, (191588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103630 states to 103630 states and 191588 transitions. [2021-11-07 01:50:28,254 INFO L78 Accepts]: Start accepts. Automaton has 103630 states and 191588 transitions. Word has length 67 [2021-11-07 01:50:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:28,254 INFO L470 AbstractCegarLoop]: Abstraction has 103630 states and 191588 transitions. [2021-11-07 01:50:28,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 103630 states and 191588 transitions. [2021-11-07 01:50:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:50:28,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:28,258 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:28,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:28,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:28,459 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash -445809572, now seen corresponding path program 1 times [2021-11-07 01:50:28,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:28,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115059885] [2021-11-07 01:50:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:28,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:28,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:28,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438985af-b115-4fc8-9226-6bff2ec1d990/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:50:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:29,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:29,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115059885] [2021-11-07 01:50:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115059885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:29,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:29,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:50:29,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158284191] [2021-11-07 01:50:29,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:29,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:29,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:29,611 INFO L87 Difference]: Start difference. First operand 103630 states and 191588 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)