./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH --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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:59:27,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:59:27,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:59:27,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:59:27,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:59:27,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:59:27,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:59:27,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:59:27,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:59:27,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:59:27,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:59:27,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:59:27,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:59:27,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:59:27,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:59:27,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:59:27,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:59:27,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:59:27,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:59:27,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:59:27,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:59:27,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:59:27,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:59:27,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:59:27,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:59:27,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:59:27,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:59:27,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:59:27,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:59:27,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:59:27,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:59:27,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:59:27,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:59:27,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:59:27,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:59:27,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:59:27,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:59:27,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:59:27,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:59:27,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:59:27,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:59:27,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:59:27,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:59:27,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:59:27,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:59:27,529 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:59:27,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:59:27,530 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:59:27,530 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:59:27,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:59:27,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:59:27,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:59:27,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:59:27,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:59:27,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:59:27,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:59:27,531 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:59:27,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:59:27,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:59:27,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:59:27,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:59:27,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:59:27,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:59:27,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:59:27,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:59:27,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:59:27,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:59:27,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:59:27,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:59:27,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:59:27,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:59:27,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:59:27,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:59:27,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:59:27,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:59:27,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:59:27,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:59:27,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:59:27,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:59:27,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:59:27,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:59:27,537 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-03 03:59:27,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:59:27,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:59:27,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:59:27,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:59:27,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:59:27,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-03 03:59:27,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/053ad1592/b0c5b8069730485bb0d99d0d57e4a306/FLAG0bc4bb34e [2021-11-03 03:59:28,595 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:59:28,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-03 03:59:28,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/053ad1592/b0c5b8069730485bb0d99d0d57e4a306/FLAG0bc4bb34e [2021-11-03 03:59:28,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/053ad1592/b0c5b8069730485bb0d99d0d57e4a306 [2021-11-03 03:59:28,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:59:28,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:59:28,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:59:28,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:59:28,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:59:28,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:28" (1/1) ... [2021-11-03 03:59:28,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c426e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:28, skipping insertion in model container [2021-11-03 03:59:28,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:28" (1/1) ... [2021-11-03 03:59:28,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:59:28,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:59:29,606 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-03 03:59:29,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:59:29,622 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) [2021-11-03 03:59:29,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ed5e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:29, skipping insertion in model container [2021-11-03 03:59:29,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:59:29,623 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:59:29,626 INFO L168 Benchmark]: Toolchain (without parser) took 818.77 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 55.6 MB in the beginning and 91.3 MB in the end (delta: -35.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:59:29,627 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:59:29,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 816.15 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 55.4 MB in the beginning and 91.3 MB in the end (delta: -35.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:59:29,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 816.15 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 55.4 MB in the beginning and 91.3 MB in the end (delta: -35.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH --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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:59:31,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:59:31,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:59:31,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:59:31,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:59:31,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:59:31,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:59:31,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:59:31,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:59:31,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:59:31,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:59:31,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:59:31,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:59:31,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:59:31,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:59:31,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:59:31,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:59:31,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:59:31,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:59:31,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:59:31,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:59:31,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:59:31,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:59:31,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:59:31,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:59:31,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:59:31,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:59:31,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:59:31,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:59:31,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:59:31,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:59:31,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:59:31,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:59:31,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:59:31,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:59:31,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:59:31,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:59:31,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:59:31,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:59:31,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:59:31,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:59:31,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:59:31,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:59:31,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:59:31,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:59:31,996 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:59:31,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:59:31,996 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:59:31,997 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:59:31,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:59:31,997 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:59:31,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:59:31,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:59:31,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:59:31,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:59:31,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:59:31,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:59:31,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:59:31,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:59:32,000 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:59:32,000 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:59:32,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:59:32,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:59:32,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:59:32,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:59:32,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:59:32,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:59:32,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:59:32,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:59:32,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:59:32,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:59:32,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:59:32,003 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:59:32,003 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:59:32,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:59:32,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:59:32,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:59:32,004 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-03 03:59:32,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:59:32,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:59:32,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:59:32,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:59:32,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:59:32,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-03 03:59:32,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/a9e519971/9ff62c537e20478bb54d894935e6de7b/FLAG507f4e6dc [2021-11-03 03:59:33,227 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:59:33,228 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-03 03:59:33,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/a9e519971/9ff62c537e20478bb54d894935e6de7b/FLAG507f4e6dc [2021-11-03 03:59:33,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/data/a9e519971/9ff62c537e20478bb54d894935e6de7b [2021-11-03 03:59:33,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:59:33,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:59:33,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:59:33,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:59:33,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:59:33,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:33" (1/1) ... [2021-11-03 03:59:33,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85efebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33, skipping insertion in model container [2021-11-03 03:59:33,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:33" (1/1) ... [2021-11-03 03:59:33,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:59:33,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:59:34,136 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-03 03:59:34,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:59:34,159 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:59:34,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:59:34,331 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-03 03:59:34,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:59:34,337 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:59:34,443 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_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-03 03:59:34,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:59:34,505 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:59:34,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34 WrapperNode [2021-11-03 03:59:34,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:59:34,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:59:34,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:59:34,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:59:34,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:59:34,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:59:34,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:59:34,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:59:34,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:34,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:35,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:59:35,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:59:35,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:59:35,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:59:35,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (1/1) ... [2021-11-03 03:59:35,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:59:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:59:35,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:59:35,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:59:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:59:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:59:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:59:35,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:59:43,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:59:43,662 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2021-11-03 03:59:43,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:43 BoogieIcfgContainer [2021-11-03 03:59:43,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:59:43,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:59:43,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:59:43,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:59:43,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:59:33" (1/3) ... [2021-11-03 03:59:43,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373e40c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:43, skipping insertion in model container [2021-11-03 03:59:43,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:34" (2/3) ... [2021-11-03 03:59:43,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373e40c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:43, skipping insertion in model container [2021-11-03 03:59:43,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:43" (3/3) ... [2021-11-03 03:59:43,679 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2021-11-03 03:59:43,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:59:43,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 03:59:43,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:59:43,790 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 [2021-11-03 03:59:43,790 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 03:59:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 2412 states, 2406 states have (on average 1.895677472984206) internal successors, (4561), 2411 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 03:59:43,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:43,873 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] [2021-11-03 03:59:43,875 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)] === [2021-11-03 03:59:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1171138841, now seen corresponding path program 1 times [2021-11-03 03:59:43,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:43,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343782786] [2021-11-03 03:59:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:43,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:43,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:43,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:59:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:59:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:44,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:44,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343782786] [2021-11-03 03:59:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343782786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:44,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:44,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:59:44,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105752226] [2021-11-03 03:59:44,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:59:44,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:59:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:59:44,620 INFO L87 Difference]: Start difference. First operand has 2412 states, 2406 states have (on average 1.895677472984206) internal successors, (4561), 2411 states have internal predecessors, (4561), 0 states have call successors, (0), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:44,761 INFO L93 Difference]: Finished difference Result 2431 states and 4584 transitions. [2021-11-03 03:59:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:59:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-03 03:59:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:44,800 INFO L225 Difference]: With dead ends: 2431 [2021-11-03 03:59:44,800 INFO L226 Difference]: Without dead ends: 2408 [2021-11-03 03:59:44,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:59:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-03 03:59:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-03 03:59:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8930503537245111) internal successors, (4549), 2407 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4549 transitions. [2021-11-03 03:59:44,966 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4549 transitions. Word has length 43 [2021-11-03 03:59:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:44,967 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4549 transitions. [2021-11-03 03:59:44,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4549 transitions. [2021-11-03 03:59:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 03:59:44,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:44,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:59:44,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:45,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:45,186 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)] === [2021-11-03 03:59:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1377702245, now seen corresponding path program 1 times [2021-11-03 03:59:45,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:45,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949543185] [2021-11-03 03:59:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:45,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:45,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:45,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:59:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:59:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:45,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:45,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949543185] [2021-11-03 03:59:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949543185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:45,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:45,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:59:45,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481247166] [2021-11-03 03:59:45,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:59:45,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:59:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:59:45,865 INFO L87 Difference]: Start difference. First operand 2408 states and 4549 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:46,012 INFO L93 Difference]: Finished difference Result 4803 states and 9079 transitions. [2021-11-03 03:59:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:59:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 03:59:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:46,029 INFO L225 Difference]: With dead ends: 4803 [2021-11-03 03:59:46,030 INFO L226 Difference]: Without dead ends: 2408 [2021-11-03 03:59:46,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:59:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-03 03:59:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-03 03:59:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8905534748231378) internal successors, (4543), 2407 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4543 transitions. [2021-11-03 03:59:46,125 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4543 transitions. Word has length 45 [2021-11-03 03:59:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:46,126 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4543 transitions. [2021-11-03 03:59:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4543 transitions. [2021-11-03 03:59:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:59:46,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:46,130 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:59:46,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:46,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:46,347 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)] === [2021-11-03 03:59:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1166698833, now seen corresponding path program 1 times [2021-11-03 03:59:46,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:46,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198705932] [2021-11-03 03:59:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:46,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:46,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:46,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:46,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:59:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:59:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:46,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:47,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:47,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198705932] [2021-11-03 03:59:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198705932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:47,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:59:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638494799] [2021-11-03 03:59:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:59:47,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:59:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:59:47,088 INFO L87 Difference]: Start difference. First operand 2408 states and 4543 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:47,306 INFO L93 Difference]: Finished difference Result 4767 states and 9002 transitions. [2021-11-03 03:59:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:59:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 03:59:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:47,324 INFO L225 Difference]: With dead ends: 4767 [2021-11-03 03:59:47,324 INFO L226 Difference]: Without dead ends: 2381 [2021-11-03 03:59:47,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:59:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-03 03:59:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-03 03:59:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.8884680134680134) internal successors, (4487), 2380 states have internal predecessors, (4487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4487 transitions. [2021-11-03 03:59:47,463 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4487 transitions. Word has length 50 [2021-11-03 03:59:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:47,464 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4487 transitions. [2021-11-03 03:59:47,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4487 transitions. [2021-11-03 03:59:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 03:59:47,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:47,469 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:59:47,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:47,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:47,686 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)] === [2021-11-03 03:59:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -505929873, now seen corresponding path program 1 times [2021-11-03 03:59:47,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:47,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124307301] [2021-11-03 03:59:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:47,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:47,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:59:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:59:48,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:48,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:48,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124307301] [2021-11-03 03:59:48,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124307301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:48,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:59:48,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669290089] [2021-11-03 03:59:48,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:59:48,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:59:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:59:48,402 INFO L87 Difference]: Start difference. First operand 2381 states and 4487 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:48,542 INFO L93 Difference]: Finished difference Result 4740 states and 8946 transitions. [2021-11-03 03:59:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:59:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 03:59:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:48,560 INFO L225 Difference]: With dead ends: 4740 [2021-11-03 03:59:48,560 INFO L226 Difference]: Without dead ends: 2381 [2021-11-03 03:59:48,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:59:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-03 03:59:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-03 03:59:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.885942760942761) internal successors, (4481), 2380 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4481 transitions. [2021-11-03 03:59:48,695 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4481 transitions. Word has length 51 [2021-11-03 03:59:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:48,696 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4481 transitions. [2021-11-03 03:59:48,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4481 transitions. [2021-11-03 03:59:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 03:59:48,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:48,698 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] [2021-11-03 03:59:48,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:48,912 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)] === [2021-11-03 03:59:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash -770642370, now seen corresponding path program 1 times [2021-11-03 03:59:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:48,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227317193] [2021-11-03 03:59:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:48,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:48,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:59:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:59:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:49,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:49,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:49,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227317193] [2021-11-03 03:59:49,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227317193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:49,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:49,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:59:49,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954543216] [2021-11-03 03:59:49,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:59:49,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:59:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:59:49,724 INFO L87 Difference]: Start difference. First operand 2381 states and 4481 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:49,954 INFO L93 Difference]: Finished difference Result 4734 states and 8929 transitions. [2021-11-03 03:59:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:59:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 03:59:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:49,970 INFO L225 Difference]: With dead ends: 4734 [2021-11-03 03:59:49,970 INFO L226 Difference]: Without dead ends: 2378 [2021-11-03 03:59:49,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:59:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-11-03 03:59:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2378. [2021-11-03 03:59:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8849557522123894) internal successors, (4473), 2377 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4473 transitions. [2021-11-03 03:59:50,085 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4473 transitions. Word has length 56 [2021-11-03 03:59:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:50,086 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4473 transitions. [2021-11-03 03:59:50,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4473 transitions. [2021-11-03 03:59:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 03:59:50,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:50,090 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] [2021-11-03 03:59:50,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:50,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:50,307 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)] === [2021-11-03 03:59:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1186467438, now seen corresponding path program 1 times [2021-11-03 03:59:50,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:50,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215656647] [2021-11-03 03:59:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:50,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:50,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:50,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:59:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:59:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:50,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:51,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:51,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215656647] [2021-11-03 03:59:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215656647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:51,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:51,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:59:51,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16672237] [2021-11-03 03:59:51,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:59:51,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:59:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:59:51,166 INFO L87 Difference]: Start difference. First operand 2378 states and 4473 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:52,889 INFO L93 Difference]: Finished difference Result 8668 states and 16371 transitions. [2021-11-03 03:59:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:59:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 03:59:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:52,931 INFO L225 Difference]: With dead ends: 8668 [2021-11-03 03:59:52,931 INFO L226 Difference]: Without dead ends: 6321 [2021-11-03 03:59:52,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:59:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6321 states. [2021-11-03 03:59:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6321 to 2378. [2021-11-03 03:59:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8419721871049304) internal successors, (4371), 2377 states have internal predecessors, (4371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4371 transitions. [2021-11-03 03:59:53,138 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4371 transitions. Word has length 57 [2021-11-03 03:59:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:53,139 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4371 transitions. [2021-11-03 03:59:53,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4371 transitions. [2021-11-03 03:59:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 03:59:53,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:53,142 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] [2021-11-03 03:59:53,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:53,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:53,361 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)] === [2021-11-03 03:59:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash 246204418, now seen corresponding path program 1 times [2021-11-03 03:59:53,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:53,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763962690] [2021-11-03 03:59:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:53,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:53,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:53,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:59:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:59:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:54,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:54,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:54,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763962690] [2021-11-03 03:59:54,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763962690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:54,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:54,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:59:54,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030497174] [2021-11-03 03:59:54,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:59:54,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:59:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:59:54,271 INFO L87 Difference]: Start difference. First operand 2378 states and 4371 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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) [2021-11-03 03:59:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:55,357 INFO L93 Difference]: Finished difference Result 6653 states and 12360 transitions. [2021-11-03 03:59:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:59:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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 [2021-11-03 03:59:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:55,387 INFO L225 Difference]: With dead ends: 6653 [2021-11-03 03:59:55,387 INFO L226 Difference]: Without dead ends: 4324 [2021-11-03 03:59:55,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:59:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-11-03 03:59:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 2344. [2021-11-03 03:59:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2339 states have (on average 1.8422402736212056) internal successors, (4309), 2343 states have internal predecessors, (4309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 4309 transitions. [2021-11-03 03:59:55,560 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 4309 transitions. Word has length 65 [2021-11-03 03:59:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 4309 transitions. [2021-11-03 03:59:55,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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) [2021-11-03 03:59:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 4309 transitions. [2021-11-03 03:59:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:59:55,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:55,564 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] [2021-11-03 03:59:55,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:55,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:55,778 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)] === [2021-11-03 03:59:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash 430279138, now seen corresponding path program 1 times [2021-11-03 03:59:55,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:55,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596768687] [2021-11-03 03:59:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:55,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:55,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:55,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:55,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:59:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:59:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:56,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:56,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:56,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596768687] [2021-11-03 03:59:56,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596768687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:56,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:56,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:59:56,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465496116] [2021-11-03 03:59:56,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:59:56,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:59:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:59:56,680 INFO L87 Difference]: Start difference. First operand 2344 states and 4309 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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) [2021-11-03 03:59:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:58,503 INFO L93 Difference]: Finished difference Result 9282 states and 17195 transitions. [2021-11-03 03:59:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:59:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 [2021-11-03 03:59:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:58,526 INFO L225 Difference]: With dead ends: 9282 [2021-11-03 03:59:58,526 INFO L226 Difference]: Without dead ends: 6986 [2021-11-03 03:59:58,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:59:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2021-11-03 03:59:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 2348. [2021-11-03 03:59:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2343 states have (on average 1.8408023900981647) internal successors, (4313), 2347 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 4313 transitions. [2021-11-03 03:59:58,753 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 4313 transitions. Word has length 67 [2021-11-03 03:59:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:58,753 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 4313 transitions. [2021-11-03 03:59:58,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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) [2021-11-03 03:59:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 4313 transitions. [2021-11-03 03:59:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 03:59:58,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:58,756 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] [2021-11-03 03:59:58,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:58,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:58,975 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)] === [2021-11-03 03:59:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1224013609, now seen corresponding path program 1 times [2021-11-03 03:59:58,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:58,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210688634] [2021-11-03 03:59:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:58,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:58,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:58,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:59:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:59:59,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:59,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:59,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:59,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210688634] [2021-11-03 03:59:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210688634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:59,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:59:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40115634] [2021-11-03 03:59:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:59:59,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:59:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:59:59,951 INFO L87 Difference]: Start difference. First operand 2348 states and 4313 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:01,330 INFO L93 Difference]: Finished difference Result 6546 states and 12095 transitions. [2021-11-03 04:00:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:00:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:00:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:01,338 INFO L225 Difference]: With dead ends: 6546 [2021-11-03 04:00:01,338 INFO L226 Difference]: Without dead ends: 4233 [2021-11-03 04:00:01,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:00:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-11-03 04:00:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 3224. [2021-11-03 04:00:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3219 states have (on average 1.8275862068965518) internal successors, (5883), 3223 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 5883 transitions. [2021-11-03 04:00:01,512 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 5883 transitions. Word has length 68 [2021-11-03 04:00:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:01,513 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 5883 transitions. [2021-11-03 04:00:01,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 5883 transitions. [2021-11-03 04:00:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:00:01,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:01,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:01,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:01,736 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)] === [2021-11-03 04:00:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash -657199347, now seen corresponding path program 1 times [2021-11-03 04:00:01,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:01,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868299292] [2021-11-03 04:00:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:01,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:01,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:01,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:00:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:00:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:02,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:02,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:02,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868299292] [2021-11-03 04:00:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868299292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:02,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:02,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:00:02,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766150252] [2021-11-03 04:00:02,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:00:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:00:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:00:02,655 INFO L87 Difference]: Start difference. First operand 3224 states and 5883 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 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) [2021-11-03 04:00:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:03,665 INFO L93 Difference]: Finished difference Result 23219 states and 42658 transitions. [2021-11-03 04:00:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:00:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:00:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:03,706 INFO L225 Difference]: With dead ends: 23219 [2021-11-03 04:00:03,706 INFO L226 Difference]: Without dead ends: 20039 [2021-11-03 04:00:03,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:00:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20039 states. [2021-11-03 04:00:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20039 to 5914. [2021-11-03 04:00:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5914 states, 5909 states have (on average 1.8392282958199357) internal successors, (10868), 5913 states have internal predecessors, (10868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5914 states to 5914 states and 10868 transitions. [2021-11-03 04:00:04,175 INFO L78 Accepts]: Start accepts. Automaton has 5914 states and 10868 transitions. Word has length 70 [2021-11-03 04:00:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 5914 states and 10868 transitions. [2021-11-03 04:00:04,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 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) [2021-11-03 04:00:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5914 states and 10868 transitions. [2021-11-03 04:00:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:00:04,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:04,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:04,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:04,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:04,396 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)] === [2021-11-03 04:00:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash 44400527, now seen corresponding path program 1 times [2021-11-03 04:00:04,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:04,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030759479] [2021-11-03 04:00:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:04,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:04,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:04,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:00:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:00:04,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:05,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:05,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:05,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030759479] [2021-11-03 04:00:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030759479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:05,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:05,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:00:05,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573816280] [2021-11-03 04:00:05,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:00:05,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:00:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:00:05,363 INFO L87 Difference]: Start difference. First operand 5914 states and 10868 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 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) [2021-11-03 04:00:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:06,258 INFO L93 Difference]: Finished difference Result 10719 states and 19613 transitions. [2021-11-03 04:00:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:00:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:00:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:06,276 INFO L225 Difference]: With dead ends: 10719 [2021-11-03 04:00:06,276 INFO L226 Difference]: Without dead ends: 8145 [2021-11-03 04:00:06,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:00:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-11-03 04:00:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 5904. [2021-11-03 04:00:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 5899 states have (on average 1.838955755212748) internal successors, (10848), 5903 states have internal predecessors, (10848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 10848 transitions. [2021-11-03 04:00:06,584 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 10848 transitions. Word has length 70 [2021-11-03 04:00:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:06,585 INFO L470 AbstractCegarLoop]: Abstraction has 5904 states and 10848 transitions. [2021-11-03 04:00:06,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 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) [2021-11-03 04:00:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 10848 transitions. [2021-11-03 04:00:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:00:06,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:06,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:06,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:06,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:06,801 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)] === [2021-11-03 04:00:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1802877815, now seen corresponding path program 1 times [2021-11-03 04:00:06,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:06,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371076099] [2021-11-03 04:00:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:06,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:06,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:00:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:00:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:07,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:07,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371076099] [2021-11-03 04:00:07,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371076099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:07,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:07,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:00:07,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087736603] [2021-11-03 04:00:07,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:00:07,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:07,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:00:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:00:07,852 INFO L87 Difference]: Start difference. First operand 5904 states and 10848 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:08,652 INFO L93 Difference]: Finished difference Result 18080 states and 33291 transitions. [2021-11-03 04:00:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:00:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:00:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:08,678 INFO L225 Difference]: With dead ends: 18080 [2021-11-03 04:00:08,678 INFO L226 Difference]: Without dead ends: 15512 [2021-11-03 04:00:08,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:00:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15512 states. [2021-11-03 04:00:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15512 to 8211. [2021-11-03 04:00:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8211 states, 8206 states have (on average 1.8325615403363393) internal successors, (15038), 8210 states have internal predecessors, (15038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8211 states to 8211 states and 15038 transitions. [2021-11-03 04:00:09,223 INFO L78 Accepts]: Start accepts. Automaton has 8211 states and 15038 transitions. Word has length 72 [2021-11-03 04:00:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 8211 states and 15038 transitions. [2021-11-03 04:00:09,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8211 states and 15038 transitions. [2021-11-03 04:00:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:00:09,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:09,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:09,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:09,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:09,442 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)] === [2021-11-03 04:00:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1605424715, now seen corresponding path program 1 times [2021-11-03 04:00:09,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:09,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395534892] [2021-11-03 04:00:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:09,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:09,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:09,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:00:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:00:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:10,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:10,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395534892] [2021-11-03 04:00:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395534892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:10,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:00:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364383195] [2021-11-03 04:00:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:00:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:00:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:00:10,549 INFO L87 Difference]: Start difference. First operand 8211 states and 15038 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:13,173 INFO L93 Difference]: Finished difference Result 36324 states and 66921 transitions. [2021-11-03 04:00:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:00:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:00:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:13,209 INFO L225 Difference]: With dead ends: 36324 [2021-11-03 04:00:13,209 INFO L226 Difference]: Without dead ends: 31449 [2021-11-03 04:00:13,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:00:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-11-03 04:00:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 11957. [2021-11-03 04:00:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.8407797858099062) internal successors, (22001), 11956 states have internal predecessors, (22001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 22001 transitions. [2021-11-03 04:00:13,961 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 22001 transitions. Word has length 74 [2021-11-03 04:00:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:13,962 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 22001 transitions. [2021-11-03 04:00:13,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 22001 transitions. [2021-11-03 04:00:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 04:00:13,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:13,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:13,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 04:00:14,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:14,180 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)] === [2021-11-03 04:00:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1997109400, now seen corresponding path program 1 times [2021-11-03 04:00:14,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:14,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128742467] [2021-11-03 04:00:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:14,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:14,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:14,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:14,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:00:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:00:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:15,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:15,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:15,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128742467] [2021-11-03 04:00:15,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128742467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:15,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:15,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:00:15,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746868434] [2021-11-03 04:00:15,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:00:15,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:00:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:00:15,200 INFO L87 Difference]: Start difference. First operand 11957 states and 22001 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:15,670 INFO L93 Difference]: Finished difference Result 20710 states and 37976 transitions. [2021-11-03 04:00:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:00:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-03 04:00:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:15,802 INFO L225 Difference]: With dead ends: 20710 [2021-11-03 04:00:15,803 INFO L226 Difference]: Without dead ends: 11972 [2021-11-03 04:00:15,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:00:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11972 states. [2021-11-03 04:00:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11972 to 11957. [2021-11-03 04:00:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.8315763052208835) internal successors, (21891), 11956 states have internal predecessors, (21891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 21891 transitions. [2021-11-03 04:00:16,363 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 21891 transitions. Word has length 81 [2021-11-03 04:00:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:16,364 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 21891 transitions. [2021-11-03 04:00:16,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 21891 transitions. [2021-11-03 04:00:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:00:16,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:16,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:16,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:16,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:16,582 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)] === [2021-11-03 04:00:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1430803184, now seen corresponding path program 1 times [2021-11-03 04:00:16,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:16,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049024813] [2021-11-03 04:00:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:16,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:16,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:16,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:00:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:00:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:17,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:17,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049024813] [2021-11-03 04:00:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049024813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:17,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:17,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:00:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726400676] [2021-11-03 04:00:17,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:00:17,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:00:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:00:17,838 INFO L87 Difference]: Start difference. First operand 11957 states and 21891 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:20,119 INFO L93 Difference]: Finished difference Result 31526 states and 57562 transitions. [2021-11-03 04:00:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:00:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 04:00:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:20,144 INFO L225 Difference]: With dead ends: 31526 [2021-11-03 04:00:20,144 INFO L226 Difference]: Without dead ends: 23126 [2021-11-03 04:00:20,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:00:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23126 states. [2021-11-03 04:00:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23126 to 10417. [2021-11-03 04:00:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10417 states, 10412 states have (on average 1.820399538993469) internal successors, (18954), 10416 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 18954 transitions. [2021-11-03 04:00:20,626 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 18954 transitions. Word has length 82 [2021-11-03 04:00:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:20,627 INFO L470 AbstractCegarLoop]: Abstraction has 10417 states and 18954 transitions. [2021-11-03 04:00:20,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 18954 transitions. [2021-11-03 04:00:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:00:20,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:20,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:20,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:20,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:20,844 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:00:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2017609198, now seen corresponding path program 1 times [2021-11-03 04:00:20,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:20,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419572992] [2021-11-03 04:00:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:20,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:20,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:20,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:00:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:00:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:21,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:22,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:22,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419572992] [2021-11-03 04:00:22,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419572992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:22,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:22,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:00:22,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133304273] [2021-11-03 04:00:22,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:00:22,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:00:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:00:22,088 INFO L87 Difference]: Start difference. First operand 10417 states and 18954 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:23,271 INFO L93 Difference]: Finished difference Result 39005 states and 71048 transitions. [2021-11-03 04:00:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:00:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 04:00:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:23,306 INFO L225 Difference]: With dead ends: 39005 [2021-11-03 04:00:23,306 INFO L226 Difference]: Without dead ends: 28794 [2021-11-03 04:00:23,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:00:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28794 states. [2021-11-03 04:00:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28794 to 28764. [2021-11-03 04:00:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28764 states, 28759 states have (on average 1.815501234396189) internal successors, (52212), 28763 states have internal predecessors, (52212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28764 states to 28764 states and 52212 transitions. [2021-11-03 04:00:24,567 INFO L78 Accepts]: Start accepts. Automaton has 28764 states and 52212 transitions. Word has length 82 [2021-11-03 04:00:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:24,568 INFO L470 AbstractCegarLoop]: Abstraction has 28764 states and 52212 transitions. [2021-11-03 04:00:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28764 states and 52212 transitions. [2021-11-03 04:00:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:00:24,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:24,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:24,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:24,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:24,772 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:00:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 352703300, now seen corresponding path program 1 times [2021-11-03 04:00:24,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:24,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628195150] [2021-11-03 04:00:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:24,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:24,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:24,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:00:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:25,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:00:25,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:25,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:25,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:25,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628195150] [2021-11-03 04:00:25,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628195150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:25,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:25,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:00:25,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703097893] [2021-11-03 04:00:25,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:00:25,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:00:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:00:25,968 INFO L87 Difference]: Start difference. First operand 28764 states and 52212 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:29,815 INFO L93 Difference]: Finished difference Result 110716 states and 200853 transitions. [2021-11-03 04:00:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:00:29,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 83 [2021-11-03 04:00:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:29,916 INFO L225 Difference]: With dead ends: 110716 [2021-11-03 04:00:29,916 INFO L226 Difference]: Without dead ends: 82159 [2021-11-03 04:00:29,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:00:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82159 states. [2021-11-03 04:00:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82159 to 82129. [2021-11-03 04:00:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82129 states, 82124 states have (on average 1.8098241683308167) internal successors, (148630), 82128 states have internal predecessors, (148630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82129 states to 82129 states and 148630 transitions. [2021-11-03 04:00:34,286 INFO L78 Accepts]: Start accepts. Automaton has 82129 states and 148630 transitions. Word has length 83 [2021-11-03 04:00:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:34,287 INFO L470 AbstractCegarLoop]: Abstraction has 82129 states and 148630 transitions. [2021-11-03 04:00:34,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 82129 states and 148630 transitions. [2021-11-03 04:00:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:00:34,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:34,292 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:00:34,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:34,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:34,512 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:00:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 370608983, now seen corresponding path program 1 times [2021-11-03 04:00:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:34,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929745145] [2021-11-03 04:00:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:00:34,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:34,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:34,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ede14f1-d2a6-4f30-8e4d-0786e363edc8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:00:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:00:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:00:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:35,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:35,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929745145] [2021-11-03 04:00:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929745145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:00:35,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:00:35,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:00:35,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222342311] [2021-11-03 04:00:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:00:35,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:00:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:00:35,977 INFO L87 Difference]: Start difference. First operand 82129 states and 148630 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)