./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:31,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:31,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:31,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:31,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:31,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:31,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:31,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:31,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:31,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:31,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:31,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:31,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:31,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:31,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:31,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:31,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:31,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:31,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:31,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:31,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:31,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:31,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:31,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:31,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:31,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:31,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:31,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:31,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:31,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:31,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:31,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:31,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:31,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:31,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:31,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:31,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:31,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:31,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:31,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:31,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:31,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:20:31,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:31,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:31,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:31,412 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:31,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:31,413 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:31,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:20:31,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:31,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:31,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:20:31,421 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:20:31,421 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:31,422 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:20:31,422 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:20:31,422 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:20:31,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:31,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:31,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:20:31,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:31,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:31,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:31,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:31,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:31,425 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:31,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:31,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:31,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:31,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:31,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:31,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:31,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:31,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:31,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:31,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:31,430 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:20:31,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:20:31,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:31,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:31,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:31,431 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-07 01:20:31,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:31,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:31,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:31,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:31,725 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:31,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-07 01:20:31,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/a73684574/ed7f3203c66440338c065a2d8e2ec207/FLAGcbacc7868 [2021-11-07 01:20:32,426 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:32,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-07 01:20:32,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/a73684574/ed7f3203c66440338c065a2d8e2ec207/FLAGcbacc7868 [2021-11-07 01:20:32,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/a73684574/ed7f3203c66440338c065a2d8e2ec207 [2021-11-07 01:20:32,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:32,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:32,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:32,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:32,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:32,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:32" (1/1) ... [2021-11-07 01:20:32,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b34e351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:32, skipping insertion in model container [2021-11-07 01:20:32,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:32" (1/1) ... [2021-11-07 01:20:32,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:32,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:33,272 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-07 01:20:33,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:33,362 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:20:33,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8f49b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:33, skipping insertion in model container [2021-11-07 01:20:33,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:33,364 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:20:33,366 INFO L168 Benchmark]: Toolchain (without parser) took 737.58 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 43.9 MB in the beginning and 60.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:33,368 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:33,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.98 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 43.7 MB in the beginning and 60.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:33,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 734.98 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 43.7 MB in the beginning and 60.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3010]: 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:35,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:35,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:35,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:35,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:35,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:35,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:35,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:35,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:35,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:35,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:35,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:35,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:35,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:35,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:35,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:35,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:35,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:35,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:35,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:35,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:35,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:35,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:35,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:35,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:35,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:35,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:35,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:35,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:35,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:35,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:35,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:35,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:35,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:35,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:35,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:35,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:35,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:35,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:35,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:35,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:35,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:20:35,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:35,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:35,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:35,837 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:35,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:35,838 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:35,838 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:35,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:35,838 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:35,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:35,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:35,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:35,840 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:20:35,841 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:20:35,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:35,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:35,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:35,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:35,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:35,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:20:35,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:35,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:35,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:35,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:35,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:35,843 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:20:35,843 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:35,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:35,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:35,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:35,844 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-07 01:20:36,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:36,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:36,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:36,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:36,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:36,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-07 01:20:36,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/06cd562af/825b3c611cb0420f99b00943a9246bfb/FLAGcebb3b7cc [2021-11-07 01:20:37,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:37,079 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-07 01:20:37,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/06cd562af/825b3c611cb0420f99b00943a9246bfb/FLAGcebb3b7cc [2021-11-07 01:20:37,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/data/06cd562af/825b3c611cb0420f99b00943a9246bfb [2021-11-07 01:20:37,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:37,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:37,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:37,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:37,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:37,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:37" (1/1) ... [2021-11-07 01:20:37,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292380e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:37, skipping insertion in model container [2021-11-07 01:20:37,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:37" (1/1) ... [2021-11-07 01:20:37,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:37,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:37,870 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-07 01:20:37,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:37,982 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:20:38,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:38,149 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-07 01:20:38,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:38,196 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:38,261 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_beac5b51-a401-41e8-b796-4c62cae6fbb8/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-07 01:20:38,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:38,316 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:38,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38 WrapperNode [2021-11-07 01:20:38,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:38,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:38,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:38,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:38,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:38,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:39,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:39,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:39,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:39,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:39,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:39,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:39,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:39,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:39,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:40,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:40,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:40,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:40,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:40,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:40,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:40,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:40,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:40,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:40,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:20:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:21:05,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:21:05,730 INFO L299 CfgBuilder]: Removed 2903 assume(true) statements. [2021-11-07 01:21:05,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:05 BoogieIcfgContainer [2021-11-07 01:21:05,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:21:05,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:21:05,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:21:05,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:21:05,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:37" (1/3) ... [2021-11-07 01:21:05,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25173617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:05, skipping insertion in model container [2021-11-07 01:21:05,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38" (2/3) ... [2021-11-07 01:21:05,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25173617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:05, skipping insertion in model container [2021-11-07 01:21:05,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:05" (3/3) ... [2021-11-07 01:21:05,756 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2021-11-07 01:21:05,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:21:05,762 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:21:05,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:21:05,869 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:21:05,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:21:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 12127 states, 12121 states have (on average 1.8842504743833017) internal successors, (22839), 12126 states have internal predecessors, (22839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:21:06,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:06,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:06,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash 893856441, now seen corresponding path program 1 times [2021-11-07 01:21:06,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:06,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731285041] [2021-11-07 01:21:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:06,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:06,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:21:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:21:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:06,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:06,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:06,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731285041] [2021-11-07 01:21:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731285041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:06,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:21:06,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121957639] [2021-11-07 01:21:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:06,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:06,852 INFO L87 Difference]: Start difference. First operand has 12127 states, 12121 states have (on average 1.8842504743833017) internal successors, (22839), 12126 states have internal predecessors, (22839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:08,387 INFO L93 Difference]: Finished difference Result 34010 states and 64049 transitions. [2021-11-07 01:21:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:21:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:08,591 INFO L225 Difference]: With dead ends: 34010 [2021-11-07 01:21:08,591 INFO L226 Difference]: Without dead ends: 21883 [2021-11-07 01:21:08,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21883 states. [2021-11-07 01:21:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21883 to 12123. [2021-11-07 01:21:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12118 states have (on average 1.883066512625846) internal successors, (22819), 12122 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 22819 transitions. [2021-11-07 01:21:09,223 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 22819 transitions. Word has length 27 [2021-11-07 01:21:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:09,223 INFO L470 AbstractCegarLoop]: Abstraction has 12123 states and 22819 transitions. [2021-11-07 01:21:09,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 22819 transitions. [2021-11-07 01:21:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:21:09,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:09,233 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] [2021-11-07 01:21:09,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:09,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:09,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2046271557, now seen corresponding path program 1 times [2021-11-07 01:21:09,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:09,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400421939] [2021-11-07 01:21:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:09,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:09,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:21:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:09,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:09,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:10,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:10,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400421939] [2021-11-07 01:21:10,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400421939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:10,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:10,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:21:10,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672277388] [2021-11-07 01:21:10,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:10,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:10,011 INFO L87 Difference]: Start difference. First operand 12123 states and 22819 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:12,689 INFO L93 Difference]: Finished difference Result 48457 states and 91201 transitions. [2021-11-07 01:21:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:21:12,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 32 [2021-11-07 01:21:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:12,844 INFO L225 Difference]: With dead ends: 48457 [2021-11-07 01:21:12,844 INFO L226 Difference]: Without dead ends: 36355 [2021-11-07 01:21:12,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36355 states. [2021-11-07 01:21:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36355 to 12101. [2021-11-07 01:21:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12101 states, 12096 states have (on average 1.8822751322751323) internal successors, (22768), 12100 states have internal predecessors, (22768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12101 states to 12101 states and 22768 transitions. [2021-11-07 01:21:13,639 INFO L78 Accepts]: Start accepts. Automaton has 12101 states and 22768 transitions. Word has length 32 [2021-11-07 01:21:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 12101 states and 22768 transitions. [2021-11-07 01:21:13,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12101 states and 22768 transitions. [2021-11-07 01:21:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:21:13,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:13,642 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] [2021-11-07 01:21:13,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:13,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash -331642843, now seen corresponding path program 1 times [2021-11-07 01:21:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:13,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462481608] [2021-11-07 01:21:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:13,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:13,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:13,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:21:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:21:14,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:14,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:14,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:14,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462481608] [2021-11-07 01:21:14,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462481608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:14,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:14,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:21:14,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883787236] [2021-11-07 01:21:14,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:14,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:14,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:14,429 INFO L87 Difference]: Start difference. First operand 12101 states and 22768 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:15,485 INFO L93 Difference]: Finished difference Result 33869 states and 63737 transitions. [2021-11-07 01:21:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:21:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:15,563 INFO L225 Difference]: With dead ends: 33869 [2021-11-07 01:21:15,564 INFO L226 Difference]: Without dead ends: 21789 [2021-11-07 01:21:15,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21789 states. [2021-11-07 01:21:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21789 to 12101. [2021-11-07 01:21:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12101 states, 12096 states have (on average 1.8817791005291005) internal successors, (22762), 12100 states have internal predecessors, (22762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12101 states to 12101 states and 22762 transitions. [2021-11-07 01:21:16,241 INFO L78 Accepts]: Start accepts. Automaton has 12101 states and 22762 transitions. Word has length 33 [2021-11-07 01:21:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:16,242 INFO L470 AbstractCegarLoop]: Abstraction has 12101 states and 22762 transitions. [2021-11-07 01:21:16,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12101 states and 22762 transitions. [2021-11-07 01:21:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:21:16,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:16,248 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] [2021-11-07 01:21:16,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:16,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:16,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1115363592, now seen corresponding path program 1 times [2021-11-07 01:21:16,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:16,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442597338] [2021-11-07 01:21:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:16,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:16,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:16,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:16,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:21:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:21:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:16,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:17,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:17,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442597338] [2021-11-07 01:21:17,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442597338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:17,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:17,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:21:17,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079073723] [2021-11-07 01:21:17,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:21:17,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:21:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:21:17,160 INFO L87 Difference]: Start difference. First operand 12101 states and 22762 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:20,083 INFO L93 Difference]: Finished difference Result 67772 states and 127524 transitions. [2021-11-07 01:21:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:21:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 38 [2021-11-07 01:21:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:20,332 INFO L225 Difference]: With dead ends: 67772 [2021-11-07 01:21:20,332 INFO L226 Difference]: Without dead ends: 55695 [2021-11-07 01:21:20,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:21:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55695 states. [2021-11-07 01:21:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55695 to 12103. [2021-11-07 01:21:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12103 states, 12098 states have (on average 1.8812200363696479) internal successors, (22759), 12102 states have internal predecessors, (22759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12103 states to 12103 states and 22759 transitions. [2021-11-07 01:21:21,052 INFO L78 Accepts]: Start accepts. Automaton has 12103 states and 22759 transitions. Word has length 38 [2021-11-07 01:21:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:21,053 INFO L470 AbstractCegarLoop]: Abstraction has 12103 states and 22759 transitions. [2021-11-07 01:21:21,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 12103 states and 22759 transitions. [2021-11-07 01:21:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:21:21,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:21,054 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] [2021-11-07 01:21:21,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:21,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:21,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 913715206, now seen corresponding path program 1 times [2021-11-07 01:21:21,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:21,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020611485] [2021-11-07 01:21:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:21,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:21,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:21,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:21:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:21:21,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:22,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:22,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020611485] [2021-11-07 01:21:22,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020611485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:22,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:22,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:21:22,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607983631] [2021-11-07 01:21:22,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:22,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:22,367 INFO L87 Difference]: Start difference. First operand 12103 states and 22759 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:24,204 INFO L93 Difference]: Finished difference Result 39307 states and 74095 transitions. [2021-11-07 01:21:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:21:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:24,332 INFO L225 Difference]: With dead ends: 39307 [2021-11-07 01:21:24,332 INFO L226 Difference]: Without dead ends: 29606 [2021-11-07 01:21:24,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29606 states. [2021-11-07 01:21:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29606 to 16584. [2021-11-07 01:21:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16584 states, 16579 states have (on average 1.8821400566982327) internal successors, (31204), 16583 states have internal predecessors, (31204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16584 states to 16584 states and 31204 transitions. [2021-11-07 01:21:25,222 INFO L78 Accepts]: Start accepts. Automaton has 16584 states and 31204 transitions. Word has length 39 [2021-11-07 01:21:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:25,225 INFO L470 AbstractCegarLoop]: Abstraction has 16584 states and 31204 transitions. [2021-11-07 01:21:25,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16584 states and 31204 transitions. [2021-11-07 01:21:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:21:25,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:25,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:25,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:25,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:25,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash -924885291, now seen corresponding path program 1 times [2021-11-07 01:21:25,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:25,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234814675] [2021-11-07 01:21:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:25,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:25,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:21:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:21:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:26,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:26,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:26,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234814675] [2021-11-07 01:21:26,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234814675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:26,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:26,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:21:26,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091495945] [2021-11-07 01:21:26,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:21:26,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:21:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:21:26,325 INFO L87 Difference]: Start difference. First operand 16584 states and 31204 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:27,792 INFO L93 Difference]: Finished difference Result 36818 states and 68956 transitions. [2021-11-07 01:21:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:21:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:21:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:27,838 INFO L225 Difference]: With dead ends: 36818 [2021-11-07 01:21:27,838 INFO L226 Difference]: Without dead ends: 21448 [2021-11-07 01:21:27,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:21:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21448 states. [2021-11-07 01:21:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21448 to 14097. [2021-11-07 01:21:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14097 states, 14092 states have (on average 1.8777320465512348) internal successors, (26461), 14096 states have internal predecessors, (26461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14097 states to 14097 states and 26461 transitions. [2021-11-07 01:21:28,392 INFO L78 Accepts]: Start accepts. Automaton has 14097 states and 26461 transitions. Word has length 58 [2021-11-07 01:21:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:28,393 INFO L470 AbstractCegarLoop]: Abstraction has 14097 states and 26461 transitions. [2021-11-07 01:21:28,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 14097 states and 26461 transitions. [2021-11-07 01:21:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:21:28,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:28,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:28,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:28,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:28,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 497327945, now seen corresponding path program 1 times [2021-11-07 01:21:28,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:28,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763489051] [2021-11-07 01:21:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:28,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:28,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:28,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:28,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:21:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:29,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:29,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:29,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:29,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763489051] [2021-11-07 01:21:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763489051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:29,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:29,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:21:29,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840935927] [2021-11-07 01:21:29,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:29,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:29,681 INFO L87 Difference]: Start difference. First operand 14097 states and 26461 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:35,353 INFO L93 Difference]: Finished difference Result 51928 states and 97791 transitions. [2021-11-07 01:21:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:21:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:35,431 INFO L225 Difference]: With dead ends: 51928 [2021-11-07 01:21:35,431 INFO L226 Difference]: Without dead ends: 37864 [2021-11-07 01:21:35,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:21:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37864 states. [2021-11-07 01:21:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37864 to 14097. [2021-11-07 01:21:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14097 states, 14092 states have (on average 1.8392705080896963) internal successors, (25919), 14096 states have internal predecessors, (25919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14097 states to 14097 states and 25919 transitions. [2021-11-07 01:21:36,389 INFO L78 Accepts]: Start accepts. Automaton has 14097 states and 25919 transitions. Word has length 59 [2021-11-07 01:21:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:36,391 INFO L470 AbstractCegarLoop]: Abstraction has 14097 states and 25919 transitions. [2021-11-07 01:21:36,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 14097 states and 25919 transitions. [2021-11-07 01:21:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:21:36,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:36,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:36,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:36,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:36,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash -784739245, now seen corresponding path program 1 times [2021-11-07 01:21:36,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:36,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189610002] [2021-11-07 01:21:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:36,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:36,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:36,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:21:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:21:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:37,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:37,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:37,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189610002] [2021-11-07 01:21:37,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189610002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:37,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:37,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:21:37,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29767496] [2021-11-07 01:21:37,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:37,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:37,615 INFO L87 Difference]: Start difference. First operand 14097 states and 25919 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:43,166 INFO L93 Difference]: Finished difference Result 72280 states and 134626 transitions. [2021-11-07 01:21:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:21:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:21:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:43,249 INFO L225 Difference]: With dead ends: 72280 [2021-11-07 01:21:43,249 INFO L226 Difference]: Without dead ends: 58234 [2021-11-07 01:21:43,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:21:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58234 states. [2021-11-07 01:21:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58234 to 20132. [2021-11-07 01:21:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20132 states, 20127 states have (on average 1.8391712624832315) internal successors, (37017), 20131 states have internal predecessors, (37017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20132 states to 20132 states and 37017 transitions. [2021-11-07 01:21:44,589 INFO L78 Accepts]: Start accepts. Automaton has 20132 states and 37017 transitions. Word has length 71 [2021-11-07 01:21:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:44,590 INFO L470 AbstractCegarLoop]: Abstraction has 20132 states and 37017 transitions. [2021-11-07 01:21:44,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20132 states and 37017 transitions. [2021-11-07 01:21:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:21:44,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:44,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:44,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:44,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1433823475, now seen corresponding path program 1 times [2021-11-07 01:21:44,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:44,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972784839] [2021-11-07 01:21:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:44,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:44,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:44,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:21:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:21:45,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:45,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:45,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:45,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972784839] [2021-11-07 01:21:45,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972784839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:45,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:45,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:21:45,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417657623] [2021-11-07 01:21:45,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:45,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:21:45,760 INFO L87 Difference]: Start difference. First operand 20132 states and 37017 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:53,262 INFO L93 Difference]: Finished difference Result 97454 states and 180217 transitions. [2021-11-07 01:21:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:21:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:21:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:53,383 INFO L225 Difference]: With dead ends: 97454 [2021-11-07 01:21:53,383 INFO L226 Difference]: Without dead ends: 77372 [2021-11-07 01:21:53,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77372 states. [2021-11-07 01:21:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77372 to 26348. [2021-11-07 01:21:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26348 states, 26343 states have (on average 1.8370724670690506) internal successors, (48394), 26347 states have internal predecessors, (48394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26348 states to 26348 states and 48394 transitions. [2021-11-07 01:21:54,763 INFO L78 Accepts]: Start accepts. Automaton has 26348 states and 48394 transitions. Word has length 73 [2021-11-07 01:21:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:54,763 INFO L470 AbstractCegarLoop]: Abstraction has 26348 states and 48394 transitions. [2021-11-07 01:21:54,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 26348 states and 48394 transitions. [2021-11-07 01:21:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:21:54,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:54,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:54,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:54,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:54,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:54,972 INFO L85 PathProgramCache]: Analyzing trace with hash -230951426, now seen corresponding path program 1 times [2021-11-07 01:21:54,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:54,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264064174] [2021-11-07 01:21:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:54,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:54,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:54,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:21:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:55,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:55,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264064174] [2021-11-07 01:21:55,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264064174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:55,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:55,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:21:55,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626457180] [2021-11-07 01:21:55,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:55,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:55,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:21:55,813 INFO L87 Difference]: Start difference. First operand 26348 states and 48394 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:10,122 INFO L93 Difference]: Finished difference Result 86914 states and 160686 transitions. [2021-11-07 01:22:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:22:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:22:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:10,214 INFO L225 Difference]: With dead ends: 86914 [2021-11-07 01:22:10,214 INFO L226 Difference]: Without dead ends: 61950 [2021-11-07 01:22:10,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:22:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61950 states. [2021-11-07 01:22:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61950 to 49566. [2021-11-07 01:22:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49566 states, 49561 states have (on average 1.8415891527612438) internal successors, (91271), 49565 states have internal predecessors, (91271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49566 states to 49566 states and 91271 transitions. [2021-11-07 01:22:12,055 INFO L78 Accepts]: Start accepts. Automaton has 49566 states and 91271 transitions. Word has length 74 [2021-11-07 01:22:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 49566 states and 91271 transitions. [2021-11-07 01:22:12,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49566 states and 91271 transitions. [2021-11-07 01:22:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:22:12,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:12,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:12,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:12,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:12,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:22:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1819299328, now seen corresponding path program 1 times [2021-11-07 01:22:12,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:12,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446656342] [2021-11-07 01:22:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:12,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:12,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:12,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:22:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:13,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:13,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:13,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446656342] [2021-11-07 01:22:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446656342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:13,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:22:13,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041536937] [2021-11-07 01:22:13,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:13,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:13,290 INFO L87 Difference]: Start difference. First operand 49566 states and 91271 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:21,444 INFO L93 Difference]: Finished difference Result 120118 states and 221720 transitions. [2021-11-07 01:22:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:22:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:21,541 INFO L225 Difference]: With dead ends: 120118 [2021-11-07 01:22:21,541 INFO L226 Difference]: Without dead ends: 71946 [2021-11-07 01:22:21,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71946 states. [2021-11-07 01:22:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71946 to 59356. [2021-11-07 01:22:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59356 states, 59351 states have (on average 1.8328924533706257) internal successors, (108784), 59355 states have internal predecessors, (108784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59356 states to 59356 states and 108784 transitions. [2021-11-07 01:22:23,664 INFO L78 Accepts]: Start accepts. Automaton has 59356 states and 108784 transitions. Word has length 74 [2021-11-07 01:22:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:23,664 INFO L470 AbstractCegarLoop]: Abstraction has 59356 states and 108784 transitions. [2021-11-07 01:22:23,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 59356 states and 108784 transitions. [2021-11-07 01:22:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:23,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:23,667 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] [2021-11-07 01:22:23,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:23,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:23,867 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:22:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash -312552842, now seen corresponding path program 1 times [2021-11-07 01:22:23,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:23,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226500256] [2021-11-07 01:22:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:23,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:23,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:23,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beac5b51-a401-41e8-b796-4c62cae6fbb8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:22:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:24,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:22:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:24,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:24,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:24,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226500256] [2021-11-07 01:22:24,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226500256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:24,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:24,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:22:24,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782230204] [2021-11-07 01:22:24,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:24,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:24,882 INFO L87 Difference]: Start difference. First operand 59356 states and 108784 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)