./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:00,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:00,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:00,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:00,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:00,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:00,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:00,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:00,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:00,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:00,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:00,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:00,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:00,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:00,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:00,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:00,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:00,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:00,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:00,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:00,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:00,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:00,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:00,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:00,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:00,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:00,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:00,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:00,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:00,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:00,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:00,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:00,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:00,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:00,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:00,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:00,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:00,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:00,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:00,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:00,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:00,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:32:00,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:00,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:00,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:00,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:00,556 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:00,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:00,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:00,556 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:32:00,557 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:00,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:00,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:32:00,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:32:00,559 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:00,559 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:32:00,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:32:00,560 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:32:00,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:00,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:00,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:32:00,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:00,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:00,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:00,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:00,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:00,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:00,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:00,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:00,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:00,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:00,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:00,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:00,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:00,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:00,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:00,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:00,567 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:32:00,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:32:00,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:00,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:00,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:00,569 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2021-11-13 02:32:00,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:00,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:00,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:00,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:00,845 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:00,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-13 02:32:00,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/858dc84bb/d869e304dea74902819fa1ad4ac98ae7/FLAG955124eb2 [2021-11-13 02:32:01,535 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:01,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-13 02:32:01,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/858dc84bb/d869e304dea74902819fa1ad4ac98ae7/FLAG955124eb2 [2021-11-13 02:32:01,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/858dc84bb/d869e304dea74902819fa1ad4ac98ae7 [2021-11-13 02:32:01,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:01,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:01,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:01,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:01,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:01,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:01" (1/1) ... [2021-11-13 02:32:01,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6992c90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:01, skipping insertion in model container [2021-11-13 02:32:01,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:01" (1/1) ... [2021-11-13 02:32:01,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:01,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:02,302 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-13 02:32:02,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:02,434 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) [2021-11-13 02:32:02,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@213e424a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:02, skipping insertion in model container [2021-11-13 02:32:02,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:02,436 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:32:02,438 INFO L158 Benchmark]: Toolchain (without parser) took 648.30ms. Allocated memory is still 115.3MB. Free memory was 81.4MB in the beginning and 74.2MB in the end (delta: 7.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:32:02,439 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 115.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:32:02,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 642.76ms. Allocated memory is still 115.3MB. Free memory was 81.1MB in the beginning and 74.2MB in the end (delta: 6.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:32:02,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 115.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 642.76ms. Allocated memory is still 115.3MB. Free memory was 81.1MB in the beginning and 74.2MB in the end (delta: 6.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 783]: 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:04,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:04,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:04,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:04,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:04,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:04,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:04,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:04,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:04,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:04,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:04,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:04,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:04,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:04,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:04,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:04,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:04,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:04,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:04,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:04,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:04,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:04,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:04,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:04,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:04,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:04,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:04,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:04,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:04,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:04,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:04,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:04,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:04,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:04,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:04,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:04,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:04,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:04,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:04,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:04,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:04,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:32:04,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:04,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:04,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:04,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:04,951 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:04,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:04,951 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:04,951 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:04,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:04,952 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:04,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:04,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:04,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:04,955 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:32:04,956 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:32:04,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:04,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:04,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:04,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:04,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:04,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:32:04,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:04,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:04,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:04,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:04,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:04,958 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:32:04,958 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:04,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:04,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:04,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:04,959 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2021-11-13 02:32:05,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:05,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:05,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:05,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:05,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:05,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-13 02:32:05,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/3764468b4/ad48e09d0d9f4a108a57a3bbc3e3b498/FLAG74ccbe038 [2021-11-13 02:32:06,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:06,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-13 02:32:06,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/3764468b4/ad48e09d0d9f4a108a57a3bbc3e3b498/FLAG74ccbe038 [2021-11-13 02:32:06,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/data/3764468b4/ad48e09d0d9f4a108a57a3bbc3e3b498 [2021-11-13 02:32:06,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:06,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:06,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:06,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:06,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:06,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:06" (1/1) ... [2021-11-13 02:32:06,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a86d32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:06, skipping insertion in model container [2021-11-13 02:32:06,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:06" (1/1) ... [2021-11-13 02:32:06,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:06,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:07,117 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-13 02:32:07,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:07,316 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:32:07,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:07,440 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-13 02:32:07,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:07,500 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:07,571 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_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-13 02:32:07,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:07,659 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:07,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07 WrapperNode [2021-11-13 02:32:07,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:07,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:07,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:07,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:07,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:07,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:07,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:07,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:07,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:07,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:07,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:07,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:07,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (1/1) ... [2021-11-13 02:32:07,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:08,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:08,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:08,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-13 02:32:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-13 02:32:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:32:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:32:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:32:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:32:08,069 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:32:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:32:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 02:32:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 02:32:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:32:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:32:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 02:32:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 02:32:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:32:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:32:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:32:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:32:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 02:32:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 02:32:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:32:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:32:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:32:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:32:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:32:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:32:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:32:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:32:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:32:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-13 02:32:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-13 02:32:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:32:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:32:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:32:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:32:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-13 02:32:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-13 02:32:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:32:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:32:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:32:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:32:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:32:08,075 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:32:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 02:32:08,075 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 02:32:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:32:08,075 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:32:08,076 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:32:08,076 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:32:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:32:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:32:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:08,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:32:08,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:32:12,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:12,189 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:32:12,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:12 BoogieIcfgContainer [2021-11-13 02:32:12,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:12,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:12,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:12,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:12,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:06" (1/3) ... [2021-11-13 02:32:12,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31318db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:12, skipping insertion in model container [2021-11-13 02:32:12,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:07" (2/3) ... [2021-11-13 02:32:12,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31318db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:12, skipping insertion in model container [2021-11-13 02:32:12,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:12" (3/3) ... [2021-11-13 02:32:12,202 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2021-11-13 02:32:12,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:12,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:32:12,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:12,290 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 [2021-11-13 02:32:12,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:32:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 597 states, 463 states have (on average 1.6781857451403888) internal successors, (777), 481 states have internal predecessors, (777), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-13 02:32:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 02:32:12,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:12,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:12,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2006006506, now seen corresponding path program 1 times [2021-11-13 02:32:12,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:12,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096698288] [2021-11-13 02:32:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:12,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:12,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:12,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:32:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:13,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:14,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:14,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096698288] [2021-11-13 02:32:14,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096698288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:14,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:14,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:32:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311049606] [2021-11-13 02:32:14,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:14,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:32:14,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:32:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:14,178 INFO L87 Difference]: Start difference. First operand has 597 states, 463 states have (on average 1.6781857451403888) internal successors, (777), 481 states have internal predecessors, (777), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:14,548 INFO L93 Difference]: Finished difference Result 1197 states and 1999 transitions. [2021-11-13 02:32:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:32:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 99 [2021-11-13 02:32:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:14,592 INFO L225 Difference]: With dead ends: 1197 [2021-11-13 02:32:14,593 INFO L226 Difference]: Without dead ends: 608 [2021-11-13 02:32:14,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:14,610 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 194 mSDsluCounter, 5737 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 6709 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.23ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.86ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:14,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 6709 Invalid, 106 Unknown, 0 Unchecked, 33.23ms Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 182.86ms Time] [2021-11-13 02:32:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-13 02:32:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 600. [2021-11-13 02:32:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 466 states have (on average 1.6695278969957081) internal successors, (778), 484 states have internal predecessors, (778), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-13 02:32:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 991 transitions. [2021-11-13 02:32:14,755 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 991 transitions. Word has length 99 [2021-11-13 02:32:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:14,756 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 991 transitions. [2021-11-13 02:32:14,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 991 transitions. [2021-11-13 02:32:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 02:32:14,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:14,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:14,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:14,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2109230418, now seen corresponding path program 1 times [2021-11-13 02:32:14,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:14,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209379163] [2021-11-13 02:32:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:14,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:14,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:15,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:32:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:16,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:16,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209379163] [2021-11-13 02:32:16,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209379163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:16,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:16,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:32:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730654124] [2021-11-13 02:32:16,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:32:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:32:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:16,400 INFO L87 Difference]: Start difference. First operand 600 states and 991 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:16,670 INFO L93 Difference]: Finished difference Result 1205 states and 2000 transitions. [2021-11-13 02:32:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:32:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 100 [2021-11-13 02:32:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:16,679 INFO L225 Difference]: With dead ends: 1205 [2021-11-13 02:32:16,679 INFO L226 Difference]: Without dead ends: 621 [2021-11-13 02:32:16,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:16,686 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 187 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.36ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:16,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 4828 Invalid, 93 Unknown, 0 Unchecked, 13.36ms Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 161.95ms Time] [2021-11-13 02:32:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-13 02:32:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 613. [2021-11-13 02:32:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 476 states have (on average 1.665966386554622) internal successors, (793), 496 states have internal predecessors, (793), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-13 02:32:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1010 transitions. [2021-11-13 02:32:16,733 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1010 transitions. Word has length 100 [2021-11-13 02:32:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:16,734 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1010 transitions. [2021-11-13 02:32:16,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1010 transitions. [2021-11-13 02:32:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 02:32:16,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:16,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:16,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:16,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:16,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1053232070, now seen corresponding path program 1 times [2021-11-13 02:32:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:16,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609008121] [2021-11-13 02:32:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:16,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:16,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:17,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:32:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:17,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:18,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:18,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609008121] [2021-11-13 02:32:18,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609008121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:18,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:18,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:32:18,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392488187] [2021-11-13 02:32:18,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:18,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:32:18,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:32:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:18,303 INFO L87 Difference]: Start difference. First operand 613 states and 1010 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:18,593 INFO L93 Difference]: Finished difference Result 1231 states and 2039 transitions. [2021-11-13 02:32:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:32:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 101 [2021-11-13 02:32:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:18,600 INFO L225 Difference]: With dead ends: 1231 [2021-11-13 02:32:18,600 INFO L226 Difference]: Without dead ends: 634 [2021-11-13 02:32:18,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:18,607 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 174 mSDsluCounter, 5706 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.29ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:18,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6678 Invalid, 116 Unknown, 0 Unchecked, 17.29ms Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 197.38ms Time] [2021-11-13 02:32:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-13 02:32:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 626. [2021-11-13 02:32:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 486 states have (on average 1.662551440329218) internal successors, (808), 508 states have internal predecessors, (808), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-13 02:32:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1029 transitions. [2021-11-13 02:32:18,655 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1029 transitions. Word has length 101 [2021-11-13 02:32:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:18,655 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1029 transitions. [2021-11-13 02:32:18,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1029 transitions. [2021-11-13 02:32:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 02:32:18,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:18,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:18,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:18,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:18,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1578917970, now seen corresponding path program 1 times [2021-11-13 02:32:18,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:18,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783116561] [2021-11-13 02:32:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:18,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:18,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:32:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:19,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:19,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:20,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783116561] [2021-11-13 02:32:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783116561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:20,215 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:20,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:32:20,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126073772] [2021-11-13 02:32:20,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:32:20,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:32:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:20,217 INFO L87 Difference]: Start difference. First operand 626 states and 1029 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:20,526 INFO L93 Difference]: Finished difference Result 1253 states and 2072 transitions. [2021-11-13 02:32:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:32:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 102 [2021-11-13 02:32:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:20,537 INFO L225 Difference]: With dead ends: 1253 [2021-11-13 02:32:20,537 INFO L226 Difference]: Without dead ends: 643 [2021-11-13 02:32:20,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:20,556 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 103 mSDsluCounter, 6686 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 7659 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.11ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:20,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 7659 Invalid, 132 Unknown, 0 Unchecked, 15.11ms Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 223.05ms Time] [2021-11-13 02:32:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-13 02:32:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 639. [2021-11-13 02:32:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 496 states have (on average 1.659274193548387) internal successors, (823), 520 states have internal predecessors, (823), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-13 02:32:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1048 transitions. [2021-11-13 02:32:20,603 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1048 transitions. Word has length 102 [2021-11-13 02:32:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:20,604 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1048 transitions. [2021-11-13 02:32:20,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1048 transitions. [2021-11-13 02:32:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 02:32:20,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:20,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:20,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:20,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:20,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 398330771, now seen corresponding path program 1 times [2021-11-13 02:32:20,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:20,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721006711] [2021-11-13 02:32:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:20,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:20,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:20,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:20,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:32:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:21,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:22,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:22,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721006711] [2021-11-13 02:32:22,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721006711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:22,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:22,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:32:22,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469028373] [2021-11-13 02:32:22,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:22,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:32:22,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:32:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:32:22,162 INFO L87 Difference]: Start difference. First operand 639 states and 1048 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:32:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:22,394 INFO L93 Difference]: Finished difference Result 1273 states and 2102 transitions. [2021-11-13 02:32:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 102 [2021-11-13 02:32:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:22,404 INFO L225 Difference]: With dead ends: 1273 [2021-11-13 02:32:22,404 INFO L226 Difference]: Without dead ends: 650 [2021-11-13 02:32:22,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:32:22,409 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 150 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6514 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.90ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:22,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6514 Invalid, 85 Unknown, 0 Unchecked, 11.90ms Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 138.77ms Time] [2021-11-13 02:32:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-13 02:32:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2021-11-13 02:32:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 504 states have (on average 1.6587301587301588) internal successors, (836), 529 states have internal predecessors, (836), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-13 02:32:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1065 transitions. [2021-11-13 02:32:22,450 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1065 transitions. Word has length 102 [2021-11-13 02:32:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:22,455 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1065 transitions. [2021-11-13 02:32:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:32:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1065 transitions. [2021-11-13 02:32:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 02:32:22,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:22,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:22,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:22,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:22,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1532162910, now seen corresponding path program 1 times [2021-11-13 02:32:22,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:22,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064061789] [2021-11-13 02:32:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:22,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:22,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:32:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:24,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:24,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064061789] [2021-11-13 02:32:24,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064061789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:24,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:24,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:32:24,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514284280] [2021-11-13 02:32:24,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:24,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:32:24,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:32:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:24,107 INFO L87 Difference]: Start difference. First operand 648 states and 1065 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:24,594 INFO L93 Difference]: Finished difference Result 1295 states and 2136 transitions. [2021-11-13 02:32:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:32:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 103 [2021-11-13 02:32:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:24,611 INFO L225 Difference]: With dead ends: 1295 [2021-11-13 02:32:24,611 INFO L226 Difference]: Without dead ends: 654 [2021-11-13 02:32:24,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:32:24,621 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 178 mSDsluCounter, 9386 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 10336 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.11ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 349.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 10336 Invalid, 250 Unknown, 0 Unchecked, 18.11ms Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 349.24ms Time] [2021-11-13 02:32:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-13 02:32:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 644. [2021-11-13 02:32:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 500 states have (on average 1.648) internal successors, (824), 525 states have internal predecessors, (824), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-13 02:32:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1053 transitions. [2021-11-13 02:32:24,664 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1053 transitions. Word has length 103 [2021-11-13 02:32:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:24,665 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1053 transitions. [2021-11-13 02:32:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1053 transitions. [2021-11-13 02:32:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 02:32:24,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:24,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:24,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:24,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1228930290, now seen corresponding path program 1 times [2021-11-13 02:32:24,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:24,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588708900] [2021-11-13 02:32:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:24,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:24,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:24,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:32:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:32:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:25,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:25,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:25,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588708900] [2021-11-13 02:32:25,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588708900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:25,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:25,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:32:25,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732549396] [2021-11-13 02:32:25,883 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:25,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:25,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:25,885 INFO L87 Difference]: Start difference. First operand 644 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:32:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:25,971 INFO L93 Difference]: Finished difference Result 1264 states and 2071 transitions. [2021-11-13 02:32:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:32:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 103 [2021-11-13 02:32:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:25,979 INFO L225 Difference]: With dead ends: 1264 [2021-11-13 02:32:25,979 INFO L226 Difference]: Without dead ends: 558 [2021-11-13 02:32:25,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:32:25,986 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 26 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.99ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:25,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2873 Invalid, 19 Unknown, 0 Unchecked, 4.31ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 39.99ms Time] [2021-11-13 02:32:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-13 02:32:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-13 02:32:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6346604215456675) internal successors, (698), 443 states have internal predecessors, (698), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-13 02:32:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 907 transitions. [2021-11-13 02:32:26,012 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 907 transitions. Word has length 103 [2021-11-13 02:32:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:26,012 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 907 transitions. [2021-11-13 02:32:26,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:32:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 907 transitions. [2021-11-13 02:32:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 02:32:26,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:26,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:26,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-13 02:32:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:26,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -810022222, now seen corresponding path program 1 times [2021-11-13 02:32:26,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:26,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663144619] [2021-11-13 02:32:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:26,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:26,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:32:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:27,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:27,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:27,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663144619] [2021-11-13 02:32:27,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663144619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:27,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:27,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:32:27,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773763108] [2021-11-13 02:32:27,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:27,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:32:27,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:32:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:27,557 INFO L87 Difference]: Start difference. First operand 558 states and 907 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:27,755 INFO L93 Difference]: Finished difference Result 1103 states and 1802 transitions. [2021-11-13 02:32:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 104 [2021-11-13 02:32:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:27,763 INFO L225 Difference]: With dead ends: 1103 [2021-11-13 02:32:27,763 INFO L226 Difference]: Without dead ends: 558 [2021-11-13 02:32:27,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:27,769 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 76 mSDsluCounter, 4427 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5317 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.55ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 5317 Invalid, 89 Unknown, 0 Unchecked, 6.74ms Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 115.55ms Time] [2021-11-13 02:32:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-13 02:32:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-13 02:32:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6323185011709602) internal successors, (697), 443 states have internal predecessors, (697), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-13 02:32:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2021-11-13 02:32:27,796 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 104 [2021-11-13 02:32:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2021-11-13 02:32:27,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2021-11-13 02:32:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 02:32:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:27,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:27,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:28,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:28,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1473273379, now seen corresponding path program 1 times [2021-11-13 02:32:28,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:28,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812345746] [2021-11-13 02:32:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:28,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:28,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:28,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:32:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:28,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:29,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:29,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812345746] [2021-11-13 02:32:29,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812345746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:29,367 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:29,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:32:29,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567034686] [2021-11-13 02:32:29,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:32:29,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:32:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:29,370 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:29,576 INFO L93 Difference]: Finished difference Result 1103 states and 1800 transitions. [2021-11-13 02:32:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 105 [2021-11-13 02:32:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:29,582 INFO L225 Difference]: With dead ends: 1103 [2021-11-13 02:32:29,583 INFO L226 Difference]: Without dead ends: 558 [2021-11-13 02:32:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:29,588 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 45 mSDsluCounter, 7963 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8853 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8853 Invalid, 126 Unknown, 0 Unchecked, 10.26ms Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 125.90ms Time] [2021-11-13 02:32:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-13 02:32:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-13 02:32:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.629976580796253) internal successors, (696), 443 states have internal predecessors, (696), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-13 02:32:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 905 transitions. [2021-11-13 02:32:29,611 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 905 transitions. Word has length 105 [2021-11-13 02:32:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:29,612 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 905 transitions. [2021-11-13 02:32:29,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 905 transitions. [2021-11-13 02:32:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:32:29,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:29,616 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:29,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:29,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:29,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1117583639, now seen corresponding path program 1 times [2021-11-13 02:32:29,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:29,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749069229] [2021-11-13 02:32:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:29,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:29,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:29,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:29,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:32:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:30,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:31,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:31,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749069229] [2021-11-13 02:32:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749069229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:31,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:31,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:32:31,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203234560] [2021-11-13 02:32:31,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:32:31,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:32:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:31,101 INFO L87 Difference]: Start difference. First operand 558 states and 905 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:31,299 INFO L93 Difference]: Finished difference Result 1103 states and 1798 transitions. [2021-11-13 02:32:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-13 02:32:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:31,305 INFO L225 Difference]: With dead ends: 1103 [2021-11-13 02:32:31,305 INFO L226 Difference]: Without dead ends: 558 [2021-11-13 02:32:31,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:31,311 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 64 mSDsluCounter, 6204 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 7094 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:31,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 7094 Invalid, 109 Unknown, 0 Unchecked, 8.67ms Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 119.31ms Time] [2021-11-13 02:32:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-13 02:32:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-13 02:32:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6276346604215457) internal successors, (695), 443 states have internal predecessors, (695), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-13 02:32:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 904 transitions. [2021-11-13 02:32:31,334 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 904 transitions. Word has length 106 [2021-11-13 02:32:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:31,334 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 904 transitions. [2021-11-13 02:32:31,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:32:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 904 transitions. [2021-11-13 02:32:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 02:32:31,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:31,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:31,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:31,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:31,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash 557726952, now seen corresponding path program 1 times [2021-11-13 02:32:31,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:31,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126943171] [2021-11-13 02:32:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:31,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:31,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:31,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:31,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:32:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:32,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:32,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:32,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126943171] [2021-11-13 02:32:32,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126943171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:32,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-13 02:32:32,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165752060] [2021-11-13 02:32:32,745 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:32:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:32:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:32:32,747 INFO L87 Difference]: Start difference. First operand 558 states and 904 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-13 02:32:34,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:38,408 INFO L93 Difference]: Finished difference Result 2311 states and 3840 transitions. [2021-11-13 02:32:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:32:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 107 [2021-11-13 02:32:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:38,434 INFO L225 Difference]: With dead ends: 2311 [2021-11-13 02:32:38,434 INFO L226 Difference]: Without dead ends: 1771 [2021-11-13 02:32:38,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:32:38,443 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 2650 mSDsluCounter, 5980 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 582 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4848.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2721 SdHoareTripleChecker+Valid, 7163 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.39ms SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5383.96ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2721 Valid, 7163 Invalid, 2466 Unknown, 0 Unchecked, 38.39ms Time], IncrementalHoareTripleChecker [582 Valid, 1883 Invalid, 1 Unknown, 0 Unchecked, 5383.96ms Time] [2021-11-13 02:32:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-13 02:32:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1753. [2021-11-13 02:32:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1324 states have (on average 1.600453172205438) internal successors, (2119), 1387 states have internal predecessors, (2119), 358 states have call successors, (358), 72 states have call predecessors, (358), 70 states have return successors, (375), 343 states have call predecessors, (375), 353 states have call successors, (375) [2021-11-13 02:32:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2852 transitions. [2021-11-13 02:32:38,556 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2852 transitions. Word has length 107 [2021-11-13 02:32:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:38,557 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2852 transitions. [2021-11-13 02:32:38,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-13 02:32:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2852 transitions. [2021-11-13 02:32:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:32:38,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:38,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:38,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:38,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:38,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 781983570, now seen corresponding path program 1 times [2021-11-13 02:32:38,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:38,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459225464] [2021-11-13 02:32:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:38,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:38,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:38,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:32:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:39,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:32:39,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:32:39,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:39,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459225464] [2021-11-13 02:32:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459225464] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:39,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-13 02:32:39,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141731310] [2021-11-13 02:32:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:32:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:32:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:32:39,969 INFO L87 Difference]: Start difference. First operand 1753 states and 2852 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:32:42,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:43,074 INFO L93 Difference]: Finished difference Result 4740 states and 7849 transitions. [2021-11-13 02:32:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-13 02:32:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:43,109 INFO L225 Difference]: With dead ends: 4740 [2021-11-13 02:32:43,109 INFO L226 Difference]: Without dead ends: 3005 [2021-11-13 02:32:43,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:43,129 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 889 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2786.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 4883 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.69ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2920.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:43,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 4883 Invalid, 483 Unknown, 0 Unchecked, 12.69ms Time], IncrementalHoareTripleChecker [134 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 2920.81ms Time] [2021-11-13 02:32:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-11-13 02:32:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2995. [2021-11-13 02:32:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2255 states have (on average 1.6075388026607538) internal successors, (3625), 2367 states have internal predecessors, (3625), 617 states have call successors, (617), 117 states have call predecessors, (617), 122 states have return successors, (701), 598 states have call predecessors, (701), 610 states have call successors, (701) [2021-11-13 02:32:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 4943 transitions. [2021-11-13 02:32:43,311 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 4943 transitions. Word has length 113 [2021-11-13 02:32:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:43,312 INFO L470 AbstractCegarLoop]: Abstraction has 2995 states and 4943 transitions. [2021-11-13 02:32:43,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:32:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 4943 transitions. [2021-11-13 02:32:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 02:32:43,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:43,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:43,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:43,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:43,531 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -918322287, now seen corresponding path program 1 times [2021-11-13 02:32:43,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:43,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677859577] [2021-11-13 02:32:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:43,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:43,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:32:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:32:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:44,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:44,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677859577] [2021-11-13 02:32:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677859577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:44,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:44,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:32:44,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727317026] [2021-11-13 02:32:44,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:44,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:44,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:32:44,726 INFO L87 Difference]: Start difference. First operand 2995 states and 4943 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 02:32:46,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:49,208 INFO L93 Difference]: Finished difference Result 10384 states and 18089 transitions. [2021-11-13 02:32:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 116 [2021-11-13 02:32:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:49,329 INFO L225 Difference]: With dead ends: 10384 [2021-11-13 02:32:49,329 INFO L226 Difference]: Without dead ends: 7407 [2021-11-13 02:32:49,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:32:49,368 INFO L933 BasicCegarLoop]: 1372 mSDtfsCounter, 1220 mSDsluCounter, 5344 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3790.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 6716 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.45ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4110.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:49,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 6716 Invalid, 1100 Unknown, 0 Unchecked, 22.45ms Time], IncrementalHoareTripleChecker [111 Valid, 988 Invalid, 1 Unknown, 0 Unchecked, 4110.65ms Time] [2021-11-13 02:32:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2021-11-13 02:32:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 5919. [2021-11-13 02:32:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 4457 states have (on average 1.597487098945479) internal successors, (7120), 4674 states have internal predecessors, (7120), 1204 states have call successors, (1204), 231 states have call predecessors, (1204), 257 states have return successors, (1683), 1189 states have call predecessors, (1683), 1192 states have call successors, (1683) [2021-11-13 02:32:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 10007 transitions. [2021-11-13 02:32:49,892 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 10007 transitions. Word has length 116 [2021-11-13 02:32:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:49,892 INFO L470 AbstractCegarLoop]: Abstraction has 5919 states and 10007 transitions. [2021-11-13 02:32:49,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 02:32:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 10007 transitions. [2021-11-13 02:32:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 02:32:49,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:49,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:49,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:50,118 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash 142007950, now seen corresponding path program 1 times [2021-11-13 02:32:50,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:50,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696223171] [2021-11-13 02:32:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:50,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:50,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:50,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:32:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:32:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:50,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:32:51,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:51,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696223171] [2021-11-13 02:32:51,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696223171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:51,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:51,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:32:51,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104467736] [2021-11-13 02:32:51,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:51,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:51,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:51,181 INFO L87 Difference]: Start difference. First operand 5919 states and 10007 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:32:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:51,647 INFO L93 Difference]: Finished difference Result 11850 states and 20277 transitions. [2021-11-13 02:32:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 118 [2021-11-13 02:32:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:51,711 INFO L225 Difference]: With dead ends: 11850 [2021-11-13 02:32:51,712 INFO L226 Difference]: Without dead ends: 5949 [2021-11-13 02:32:51,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:32:51,746 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 30 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.55ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:51,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1752 Invalid, 72 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 144.55ms Time] [2021-11-13 02:32:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5949 states. [2021-11-13 02:32:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5949 to 5939. [2021-11-13 02:32:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 4472 states have (on average 1.5943649373881932) internal successors, (7130), 4689 states have internal predecessors, (7130), 1204 states have call successors, (1204), 241 states have call predecessors, (1204), 262 states have return successors, (1662), 1184 states have call predecessors, (1662), 1192 states have call successors, (1662) [2021-11-13 02:32:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9996 transitions. [2021-11-13 02:32:52,166 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9996 transitions. Word has length 118 [2021-11-13 02:32:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:52,166 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 9996 transitions. [2021-11-13 02:32:52,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:32:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9996 transitions. [2021-11-13 02:32:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:32:52,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:52,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:52,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:52,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:52,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1206851878, now seen corresponding path program 1 times [2021-11-13 02:32:52,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:52,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179563373] [2021-11-13 02:32:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:52,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:52,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:52,394 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:52,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:32:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:32:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:32:53,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:32:53,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:53,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179563373] [2021-11-13 02:32:53,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179563373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:53,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:53,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:32:53,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028213368] [2021-11-13 02:32:53,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:53,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:53,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:32:53,650 INFO L87 Difference]: Start difference. First operand 5939 states and 9996 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-13 02:32:55,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:58,177 INFO L93 Difference]: Finished difference Result 20803 states and 37610 transitions. [2021-11-13 02:32:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:58,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 126 [2021-11-13 02:32:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:58,324 INFO L225 Difference]: With dead ends: 20803 [2021-11-13 02:32:58,324 INFO L226 Difference]: Without dead ends: 14882 [2021-11-13 02:32:58,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:32:58,367 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1179 mSDsluCounter, 5630 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3590.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 7015 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.94ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3863.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:58,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 7015 Invalid, 1170 Unknown, 0 Unchecked, 19.94ms Time], IncrementalHoareTripleChecker [97 Valid, 1072 Invalid, 1 Unknown, 0 Unchecked, 3863.72ms Time] [2021-11-13 02:32:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-11-13 02:32:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 11862. [2021-11-13 02:32:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11862 states, 8931 states have (on average 1.5875041988579106) internal successors, (14178), 9363 states have internal predecessors, (14178), 2383 states have call successors, (2383), 479 states have call predecessors, (2383), 547 states have return successors, (4045), 2371 states have call predecessors, (4045), 2361 states have call successors, (4045) [2021-11-13 02:32:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11862 states to 11862 states and 20606 transitions. [2021-11-13 02:32:59,390 INFO L78 Accepts]: Start accepts. Automaton has 11862 states and 20606 transitions. Word has length 126 [2021-11-13 02:32:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:59,391 INFO L470 AbstractCegarLoop]: Abstraction has 11862 states and 20606 transitions. [2021-11-13 02:32:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-13 02:32:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11862 states and 20606 transitions. [2021-11-13 02:32:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:32:59,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:59,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:59,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:59,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:59,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1454948622, now seen corresponding path program 1 times [2021-11-13 02:32:59,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:59,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343203940] [2021-11-13 02:32:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:59,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:59,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:59,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:33:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:00,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:00,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:33:00,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:33:00,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:00,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343203940] [2021-11-13 02:33:00,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343203940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:00,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:00,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:33:00,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400678412] [2021-11-13 02:33:00,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:00,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:00,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:00,575 INFO L87 Difference]: Start difference. First operand 11862 states and 20606 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 02:33:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:01,452 INFO L93 Difference]: Finished difference Result 23826 states and 42012 transitions. [2021-11-13 02:33:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 127 [2021-11-13 02:33:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:01,538 INFO L225 Difference]: With dead ends: 23826 [2021-11-13 02:33:01,539 INFO L226 Difference]: Without dead ends: 11982 [2021-11-13 02:33:01,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:01,772 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 21 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:01,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2618 Invalid, 85 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [19 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 105.37ms Time] [2021-11-13 02:33:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11982 states. [2021-11-13 02:33:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11982 to 11962. [2021-11-13 02:33:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11962 states, 9021 states have (on average 1.5827513579425785) internal successors, (14278), 9433 states have internal predecessors, (14278), 2383 states have call successors, (2383), 519 states have call predecessors, (2383), 557 states have return successors, (4015), 2361 states have call predecessors, (4015), 2361 states have call successors, (4015) [2021-11-13 02:33:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11962 states to 11962 states and 20676 transitions. [2021-11-13 02:33:02,935 INFO L78 Accepts]: Start accepts. Automaton has 11962 states and 20676 transitions. Word has length 127 [2021-11-13 02:33:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:02,936 INFO L470 AbstractCegarLoop]: Abstraction has 11962 states and 20676 transitions. [2021-11-13 02:33:02,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 02:33:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 11962 states and 20676 transitions. [2021-11-13 02:33:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:33:02,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:02,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:02,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:03,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:03,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash 202275201, now seen corresponding path program 1 times [2021-11-13 02:33:03,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:03,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886973664] [2021-11-13 02:33:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:03,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:03,157 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:03,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:33:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:33:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:33:04,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:33:04,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:04,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886973664] [2021-11-13 02:33:04,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886973664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:04,473 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:04,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:33:04,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028602753] [2021-11-13 02:33:04,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:04,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:33:04,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:33:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:04,475 INFO L87 Difference]: Start difference. First operand 11962 states and 20676 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 02:33:06,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:08,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:11,897 INFO L93 Difference]: Finished difference Result 41821 states and 79615 transitions. [2021-11-13 02:33:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:33:11,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 137 [2021-11-13 02:33:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:12,141 INFO L225 Difference]: With dead ends: 41821 [2021-11-13 02:33:12,141 INFO L226 Difference]: Without dead ends: 29877 [2021-11-13 02:33:12,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:12,462 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 1165 mSDsluCounter, 5612 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5686.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.75ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5939.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:12,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 6988 Invalid, 1155 Unknown, 0 Unchecked, 23.75ms Time], IncrementalHoareTripleChecker [96 Valid, 1057 Invalid, 2 Unknown, 0 Unchecked, 5939.47ms Time] [2021-11-13 02:33:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29877 states. [2021-11-13 02:33:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29877 to 23993. [2021-11-13 02:33:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23993 states, 18089 states have (on average 1.5765935098678756) internal successors, (28519), 18921 states have internal predecessors, (28519), 4746 states have call successors, (4746), 1035 states have call predecessors, (4746), 1157 states have return successors, (10036), 4740 states have call predecessors, (10036), 4704 states have call successors, (10036) [2021-11-13 02:33:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23993 states to 23993 states and 43301 transitions. [2021-11-13 02:33:14,806 INFO L78 Accepts]: Start accepts. Automaton has 23993 states and 43301 transitions. Word has length 137 [2021-11-13 02:33:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:14,806 INFO L470 AbstractCegarLoop]: Abstraction has 23993 states and 43301 transitions. [2021-11-13 02:33:14,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 02:33:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23993 states and 43301 transitions. [2021-11-13 02:33:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 02:33:14,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:14,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:14,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:15,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:15,022 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1534827314, now seen corresponding path program 1 times [2021-11-13 02:33:15,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:15,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58157395] [2021-11-13 02:33:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:15,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:15,026 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:15,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:33:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:33:15,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:33:16,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:16,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58157395] [2021-11-13 02:33:16,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58157395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:16,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:16,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:33:16,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163222398] [2021-11-13 02:33:16,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:16,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:16,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:16,019 INFO L87 Difference]: Start difference. First operand 23993 states and 43301 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:33:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:17,537 INFO L93 Difference]: Finished difference Result 48208 states and 88912 transitions. [2021-11-13 02:33:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:17,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 138 [2021-11-13 02:33:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:17,726 INFO L225 Difference]: With dead ends: 48208 [2021-11-13 02:33:17,726 INFO L226 Difference]: Without dead ends: 24233 [2021-11-13 02:33:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:18,055 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 27 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:18,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2618 Invalid, 79 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 73.38ms Time] [2021-11-13 02:33:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2021-11-13 02:33:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 24193. [2021-11-13 02:33:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24193 states, 18269 states have (on average 1.5720072253544255) internal successors, (28719), 19101 states have internal predecessors, (28719), 4746 states have call successors, (4746), 1075 states have call predecessors, (4746), 1177 states have return successors, (10000), 4720 states have call predecessors, (10000), 4704 states have call successors, (10000) [2021-11-13 02:33:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24193 states to 24193 states and 43465 transitions. [2021-11-13 02:33:19,652 INFO L78 Accepts]: Start accepts. Automaton has 24193 states and 43465 transitions. Word has length 138 [2021-11-13 02:33:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:19,653 INFO L470 AbstractCegarLoop]: Abstraction has 24193 states and 43465 transitions. [2021-11-13 02:33:19,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:33:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 24193 states and 43465 transitions. [2021-11-13 02:33:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 02:33:19,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:19,658 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:19,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:19,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:19,875 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -771917454, now seen corresponding path program 1 times [2021-11-13 02:33:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:19,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207090524] [2021-11-13 02:33:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:19,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:19,879 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:33:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:33:20,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:33:21,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:33:21,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:21,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207090524] [2021-11-13 02:33:21,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207090524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:21,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:21,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:33:21,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854821043] [2021-11-13 02:33:21,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:21,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:33:21,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:33:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:21,408 INFO L87 Difference]: Start difference. First operand 24193 states and 43465 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:33:23,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:28,758 INFO L93 Difference]: Finished difference Result 84259 states and 173137 transitions. [2021-11-13 02:33:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:33:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 148 [2021-11-13 02:33:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:29,367 INFO L225 Difference]: With dead ends: 84259 [2021-11-13 02:33:29,367 INFO L226 Difference]: Without dead ends: 60084 [2021-11-13 02:33:29,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:29,690 INFO L933 BasicCegarLoop]: 1237 mSDtfsCounter, 1232 mSDsluCounter, 4988 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 151 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3352.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 6225 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.34ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3565.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:29,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1305 Valid, 6225 Invalid, 1022 Unknown, 0 Unchecked, 16.34ms Time], IncrementalHoareTripleChecker [151 Valid, 870 Invalid, 1 Unknown, 0 Unchecked, 3565.70ms Time] [2021-11-13 02:33:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-11-13 02:33:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 48600. [2021-11-13 02:33:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48600 states, 36685 states have (on average 1.5666348643859889) internal successors, (57472), 38377 states have internal predecessors, (57472), 9477 states have call successors, (9477), 2147 states have call predecessors, (9477), 2437 states have return successors, (26013), 9483 states have call predecessors, (26013), 9395 states have call successors, (26013) [2021-11-13 02:33:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48600 states to 48600 states and 92962 transitions. [2021-11-13 02:33:33,883 INFO L78 Accepts]: Start accepts. Automaton has 48600 states and 92962 transitions. Word has length 148 [2021-11-13 02:33:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:33,883 INFO L470 AbstractCegarLoop]: Abstraction has 48600 states and 92962 transitions. [2021-11-13 02:33:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:33:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 48600 states and 92962 transitions. [2021-11-13 02:33:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 02:33:33,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:33,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:33,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 02:33:34,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:34,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2036557838, now seen corresponding path program 1 times [2021-11-13 02:33:34,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:34,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940545269] [2021-11-13 02:33:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:34,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:34,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:34,093 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:34,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:33:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:33:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:33:34,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:33:35,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:35,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940545269] [2021-11-13 02:33:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940545269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:35,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:35,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:33:35,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153507514] [2021-11-13 02:33:35,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:35,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:33:35,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:33:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:35,313 INFO L87 Difference]: Start difference. First operand 48600 states and 92962 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-13 02:33:37,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:44,238 INFO L93 Difference]: Finished difference Result 110748 states and 229798 transitions. [2021-11-13 02:33:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:33:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 150 [2021-11-13 02:33:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:44,684 INFO L225 Difference]: With dead ends: 110748 [2021-11-13 02:33:44,684 INFO L226 Difference]: Without dead ends: 62166 [2021-11-13 02:33:45,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:45,580 INFO L933 BasicCegarLoop]: 1329 mSDtfsCounter, 2285 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 267 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3859.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 4015 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.26ms SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4163.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:45,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2373 Valid, 4015 Invalid, 1573 Unknown, 0 Unchecked, 15.26ms Time], IncrementalHoareTripleChecker [267 Valid, 1305 Invalid, 1 Unknown, 0 Unchecked, 4163.23ms Time] [2021-11-13 02:33:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62166 states. [2021-11-13 02:33:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62166 to 53028. [2021-11-13 02:33:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53028 states, 40095 states have (on average 1.5663299663299664) internal successors, (62802), 41883 states have internal predecessors, (62802), 10165 states have call successors, (10165), 2451 states have call predecessors, (10165), 2767 states have return successors, (31659), 10101 states have call predecessors, (31659), 10083 states have call successors, (31659) [2021-11-13 02:33:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53028 states to 53028 states and 104626 transitions. [2021-11-13 02:33:50,130 INFO L78 Accepts]: Start accepts. Automaton has 53028 states and 104626 transitions. Word has length 150 [2021-11-13 02:33:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:50,130 INFO L470 AbstractCegarLoop]: Abstraction has 53028 states and 104626 transitions. [2021-11-13 02:33:50,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-13 02:33:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 53028 states and 104626 transitions. [2021-11-13 02:33:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 02:33:50,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:50,132 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:50,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:50,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:50,333 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 273900688, now seen corresponding path program 1 times [2021-11-13 02:33:50,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:50,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413655255] [2021-11-13 02:33:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:50,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:50,336 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:50,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:33:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:33:51,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 02:33:52,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:52,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413655255] [2021-11-13 02:33:52,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413655255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:52,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:52,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-13 02:33:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750773446] [2021-11-13 02:33:52,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:52,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:52,849 INFO L87 Difference]: Start difference. First operand 53028 states and 104626 transitions. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 02:33:54,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:56,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:05,588 INFO L93 Difference]: Finished difference Result 125081 states and 254714 transitions. [2021-11-13 02:34:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 153 [2021-11-13 02:34:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:06,388 INFO L225 Difference]: With dead ends: 125081 [2021-11-13 02:34:06,388 INFO L226 Difference]: Without dead ends: 72071 [2021-11-13 02:34:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:06,821 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 1528 mSDsluCounter, 2718 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 288 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6628.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 3830 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.84ms SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7196.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:06,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 3830 Invalid, 873 Unknown, 0 Unchecked, 11.84ms Time], IncrementalHoareTripleChecker [288 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 7196.00ms Time] [2021-11-13 02:34:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72071 states. [2021-11-13 02:34:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72071 to 66404. [2021-11-13 02:34:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66404 states, 49518 states have (on average 1.5621592148309706) internal successors, (77355), 51987 states have internal predecessors, (77355), 13823 states have call successors, (13823), 2629 states have call predecessors, (13823), 3062 states have return successors, (43245), 13263 states have call predecessors, (43245), 13736 states have call successors, (43245) [2021-11-13 02:34:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66404 states to 66404 states and 134423 transitions. [2021-11-13 02:34:11,916 INFO L78 Accepts]: Start accepts. Automaton has 66404 states and 134423 transitions. Word has length 153 [2021-11-13 02:34:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:11,916 INFO L470 AbstractCegarLoop]: Abstraction has 66404 states and 134423 transitions. [2021-11-13 02:34:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 02:34:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 66404 states and 134423 transitions. [2021-11-13 02:34:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-13 02:34:11,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:11,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:11,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:12,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:12,135 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -817247136, now seen corresponding path program 1 times [2021-11-13 02:34:12,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:12,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135536950] [2021-11-13 02:34:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:12,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:12,137 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:12,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1af5d3f-56ec-4d78-a3d3-9d23c0bd1df4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:34:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:34:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 02:34:13,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:34:13,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:13,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135536950] [2021-11-13 02:34:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135536950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:13,459 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:34:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967091193] [2021-11-13 02:34:13,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:13,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:34:13,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:34:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:13,461 INFO L87 Difference]: Start difference. First operand 66404 states and 134423 transitions. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22)