./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.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_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/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_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/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_4c8bc670-4220-40b3-a649-d79e00761b09/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 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:19,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:19,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:19,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:19,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:19,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:19,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:19,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:19,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:19,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:19,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:19,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:19,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:19,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:19,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:19,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:19,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:19,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:19,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:19,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:19,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:19,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:19,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:19,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:19,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:19,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:19,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:19,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:19,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:19,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:19,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:19,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:19,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:19,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:19,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:19,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:19,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:19,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:19,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:19,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:19,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:19,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:19,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:19,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:19,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:19,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:19,526 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:19,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:19,526 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:19,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:19,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:19,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:19,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:19,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:19,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:19,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:19,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:19,529 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:19,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:19,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:19,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:19,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:19,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:19,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:19,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:19,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:19,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:19,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:19,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:19,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:19,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:19,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:19,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:19,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:19,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:19,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:19,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:19,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:19,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:19,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:19,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:19,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:19,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-13 01:31:19,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:19,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:19,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:19,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:19,927 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:19,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-13 01:31:20,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/30a4f8bdf/f6431a67d89a4093a639fd359dbb8a47/FLAG71b4db035 [2021-11-13 01:31:20,726 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:20,726 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-13 01:31:20,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/30a4f8bdf/f6431a67d89a4093a639fd359dbb8a47/FLAG71b4db035 [2021-11-13 01:31:20,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/30a4f8bdf/f6431a67d89a4093a639fd359dbb8a47 [2021-11-13 01:31:20,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:20,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:20,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:20,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:20,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:20,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:20" (1/1) ... [2021-11-13 01:31:20,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5e7a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:20, skipping insertion in model container [2021-11-13 01:31:20,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:20" (1/1) ... [2021-11-13 01:31:20,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:21,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:21,337 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_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-13 01:31:21,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:21,606 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 01:31:21,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26832a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:21, skipping insertion in model container [2021-11-13 01:31:21,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:21,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:31:21,610 INFO L158 Benchmark]: Toolchain (without parser) took 692.03ms. Allocated memory was 83.9MB in the beginning and 109.1MB in the end (delta: 25.2MB). Free memory was 41.7MB in the beginning and 69.5MB in the end (delta: -27.8MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-13 01:31:21,610 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory is still 61.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:31:21,611 INFO L158 Benchmark]: CACSL2BoogieTranslator took 688.65ms. Allocated memory was 83.9MB in the beginning and 109.1MB in the end (delta: 25.2MB). Free memory was 41.5MB in the beginning and 69.5MB in the end (delta: -28.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-13 01:31:21,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 83.9MB. Free memory is still 61.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 688.65ms. Allocated memory was 83.9MB in the beginning and 109.1MB in the end (delta: 25.2MB). Free memory was 41.5MB in the beginning and 69.5MB in the end (delta: -28.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/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_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/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_4c8bc670-4220-40b3-a649-d79e00761b09/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 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:24,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:24,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:24,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:24,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:24,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:24,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:24,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:24,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:24,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:24,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:24,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:24,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:24,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:24,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:24,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:24,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:24,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:24,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:24,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:24,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:24,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:24,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:24,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:24,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:24,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:24,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:24,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:24,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:24,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:24,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:24,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:24,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:24,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:24,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:24,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:24,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:24,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:24,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:24,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:24,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:24,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:31:24,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:24,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:24,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:24,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:24,377 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:24,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:24,378 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:24,378 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:24,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:24,379 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:24,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:24,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:24,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:24,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:24,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:24,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:24,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:24,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:24,384 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:31:24,385 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:31:24,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:24,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:24,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:24,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:24,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:24,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:31:24,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:24,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:24,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:24,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:24,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:24,389 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:31:24,389 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:24,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:24,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:24,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:24,391 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_4c8bc670-4220-40b3-a649-d79e00761b09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-13 01:31:24,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:24,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:24,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:24,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:24,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:24,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-13 01:31:24,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/26a762766/31e0b08ec2ca48749a83dfaf68d480e2/FLAG7862b758f [2021-11-13 01:31:25,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:25,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-13 01:31:25,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/26a762766/31e0b08ec2ca48749a83dfaf68d480e2/FLAG7862b758f [2021-11-13 01:31:26,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/data/26a762766/31e0b08ec2ca48749a83dfaf68d480e2 [2021-11-13 01:31:26,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:26,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:26,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:26,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:26,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:26,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:26" (1/1) ... [2021-11-13 01:31:26,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510a703c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:26, skipping insertion in model container [2021-11-13 01:31:26,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:26" (1/1) ... [2021-11-13 01:31:26,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:26,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:26,922 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_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-13 01:31:27,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,252 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:31:27,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:27,349 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_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-13 01:31:27,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,533 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:31:27,591 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_4c8bc670-4220-40b3-a649-d79e00761b09/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-13 01:31:27,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,743 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:31:27,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27 WrapperNode [2021-11-13 01:31:27,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:27,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:27,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:31:27,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:31:27,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:27,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:31:27,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:31:27,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:31:27,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:28,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:31:28,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:31:28,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:31:28,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:31:28,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:28,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:28,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:28,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:31:28,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:31:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 01:31:28,115 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 01:31:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 01:31:28,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 01:31:28,116 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 01:31:28,116 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 01:31:28,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:31:28,116 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 01:31:28,116 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 01:31:28,116 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 01:31:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 01:31:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 01:31:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 01:31:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 01:31:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 01:31:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 01:31:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 01:31:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 01:31:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 01:31:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 01:31:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 01:31:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 01:31:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 01:31:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 01:31:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 01:31:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 01:31:28,139 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 01:31:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:31:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 01:31:28,139 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 01:31:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 01:31:28,139 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 01:31:28,140 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 01:31:28,140 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 01:31:28,140 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 01:31:28,140 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 01:31:28,140 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 01:31:28,140 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 01:31:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 01:31:28,141 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 01:31:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 01:31:28,141 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 01:31:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 01:31:28,141 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 01:31:28,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:31:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:31:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 01:31:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 01:31:32,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:31:32,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:31:32,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:32 BoogieIcfgContainer [2021-11-13 01:31:32,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:31:32,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:31:32,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:31:32,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:31:32,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:31:26" (1/3) ... [2021-11-13 01:31:32,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb2ff7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:32, skipping insertion in model container [2021-11-13 01:31:32,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (2/3) ... [2021-11-13 01:31:32,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb2ff7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:32, skipping insertion in model container [2021-11-13 01:31:32,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:32" (3/3) ... [2021-11-13 01:31:32,581 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2021-11-13 01:31:32,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:31:32,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:31:32,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:31:32,663 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 01:31:32,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:31:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 433 states have (on average 1.7066974595842956) internal successors, (739), 454 states have internal predecessors, (739), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-13 01:31:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 01:31:32,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:32,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:32,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1967759717, now seen corresponding path program 1 times [2021-11-13 01:31:32,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:32,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001834656] [2021-11-13 01:31:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:32,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:32,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:32,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:31:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:31:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:31:34,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:31:34,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:34,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001834656] [2021-11-13 01:31:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001834656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:34,379 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:34,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:31:34,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966964358] [2021-11-13 01:31:34,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:34,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:31:34,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:31:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:31:34,442 INFO L87 Difference]: Start difference. First operand has 548 states, 433 states have (on average 1.7066974595842956) internal successors, (739), 454 states have internal predecessors, (739), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:31:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:34,555 INFO L93 Difference]: Finished difference Result 569 states and 951 transitions. [2021-11-13 01:31:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:31:34,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-13 01:31:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:34,585 INFO L225 Difference]: With dead ends: 569 [2021-11-13 01:31:34,586 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 01:31:34,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:31:34,596 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:34,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 13.93ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:31:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 01:31:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 01:31:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7049180327868851) internal successors, (728), 446 states have internal predecessors, (728), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 905 transitions. [2021-11-13 01:31:34,742 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 905 transitions. Word has length 97 [2021-11-13 01:31:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:34,745 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 905 transitions. [2021-11-13 01:31:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:31:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 905 transitions. [2021-11-13 01:31:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:31:34,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:34,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:34,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:31:34,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:34,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1542777770, now seen corresponding path program 1 times [2021-11-13 01:31:34,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:34,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678385185] [2021-11-13 01:31:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:34,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:34,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:35,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:31:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:36,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:36,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:36,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678385185] [2021-11-13 01:31:36,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678385185] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:36,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:36,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:36,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66546858] [2021-11-13 01:31:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:36,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:36,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:36,424 INFO L87 Difference]: Start difference. First operand 540 states and 905 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:36,614 INFO L93 Difference]: Finished difference Result 1071 states and 1802 transitions. [2021-11-13 01:31:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-13 01:31:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:36,624 INFO L225 Difference]: With dead ends: 1071 [2021-11-13 01:31:36,624 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 01:31:36,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:36,637 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 14 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:36,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2666 Invalid, 35 Unknown, 0 Unchecked, 22.89ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 54.56ms Time] [2021-11-13 01:31:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 01:31:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 01:31:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7025761124121779) internal successors, (727), 446 states have internal predecessors, (727), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 904 transitions. [2021-11-13 01:31:36,715 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 904 transitions. Word has length 99 [2021-11-13 01:31:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:36,717 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 904 transitions. [2021-11-13 01:31:36,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 904 transitions. [2021-11-13 01:31:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:31:36,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:36,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:36,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:36,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:36,943 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1481525902, now seen corresponding path program 1 times [2021-11-13 01:31:36,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:36,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569603630] [2021-11-13 01:31:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:36,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:36,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:36,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:31:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:37,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:38,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:38,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:38,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569603630] [2021-11-13 01:31:38,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569603630] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:38,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:38,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:38,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877012399] [2021-11-13 01:31:38,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:38,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:38,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:38,373 INFO L87 Difference]: Start difference. First operand 540 states and 904 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:38,496 INFO L93 Difference]: Finished difference Result 1071 states and 1800 transitions. [2021-11-13 01:31:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:38,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-13 01:31:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:38,506 INFO L225 Difference]: With dead ends: 1071 [2021-11-13 01:31:38,506 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 01:31:38,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:38,516 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 12 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.93ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:38,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2666 Invalid, 33 Unknown, 0 Unchecked, 14.70ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 54.93ms Time] [2021-11-13 01:31:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 01:31:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 01:31:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7002341920374706) internal successors, (726), 446 states have internal predecessors, (726), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 903 transitions. [2021-11-13 01:31:38,577 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 903 transitions. Word has length 101 [2021-11-13 01:31:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 903 transitions. [2021-11-13 01:31:38,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 903 transitions. [2021-11-13 01:31:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 01:31:38,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:38,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:38,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:38,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:38,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1026290454, now seen corresponding path program 1 times [2021-11-13 01:31:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959603076] [2021-11-13 01:31:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:38,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:38,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:38,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:38,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:31:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:39,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:40,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:40,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959603076] [2021-11-13 01:31:40,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959603076] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:40,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:40,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:40,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946717827] [2021-11-13 01:31:40,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:40,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:40,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:40,196 INFO L87 Difference]: Start difference. First operand 540 states and 903 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:40,302 INFO L93 Difference]: Finished difference Result 1075 states and 1803 transitions. [2021-11-13 01:31:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-13 01:31:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:40,309 INFO L225 Difference]: With dead ends: 1075 [2021-11-13 01:31:40,310 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:31:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:40,315 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 13 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:40,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2666 Invalid, 35 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 46.61ms Time] [2021-11-13 01:31:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:31:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:31:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 432 states have (on average 1.6921296296296295) internal successors, (731), 451 states have internal predecessors, (731), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 908 transitions. [2021-11-13 01:31:40,350 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 908 transitions. Word has length 103 [2021-11-13 01:31:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:40,351 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 908 transitions. [2021-11-13 01:31:40,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 908 transitions. [2021-11-13 01:31:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 01:31:40,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:40,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:40,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:40,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:40,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1866135415, now seen corresponding path program 1 times [2021-11-13 01:31:40,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:40,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893175609] [2021-11-13 01:31:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:40,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:40,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:40,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:31:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:41,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:41,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893175609] [2021-11-13 01:31:41,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893175609] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:41,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:41,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:41,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446683528] [2021-11-13 01:31:41,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:41,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:41,901 INFO L87 Difference]: Start difference. First operand 546 states and 908 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:41,980 INFO L93 Difference]: Finished difference Result 1074 states and 1794 transitions. [2021-11-13 01:31:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-13 01:31:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:41,987 INFO L225 Difference]: With dead ends: 1074 [2021-11-13 01:31:41,987 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:31:41,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:41,995 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 8 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:41,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2667 Invalid, 30 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 31.65ms Time] [2021-11-13 01:31:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:31:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:31:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 432 states have (on average 1.6898148148148149) internal successors, (730), 451 states have internal predecessors, (730), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 907 transitions. [2021-11-13 01:31:42,057 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 907 transitions. Word has length 104 [2021-11-13 01:31:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:42,058 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 907 transitions. [2021-11-13 01:31:42,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 907 transitions. [2021-11-13 01:31:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 01:31:42,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:42,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:42,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:42,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:42,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 621974734, now seen corresponding path program 1 times [2021-11-13 01:31:42,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:42,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824575712] [2021-11-13 01:31:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:42,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:42,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:42,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:31:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:43,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:43,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824575712] [2021-11-13 01:31:43,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824575712] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:43,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:43,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:43,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525330314] [2021-11-13 01:31:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:43,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:43,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:43,730 INFO L87 Difference]: Start difference. First operand 546 states and 907 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:43,818 INFO L93 Difference]: Finished difference Result 1074 states and 1793 transitions. [2021-11-13 01:31:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-13 01:31:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:43,826 INFO L225 Difference]: With dead ends: 1074 [2021-11-13 01:31:43,826 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:31:43,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:43,831 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 6 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.44ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:43,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2667 Invalid, 28 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 37.44ms Time] [2021-11-13 01:31:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:31:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:31:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 432 states have (on average 1.6875) internal successors, (729), 451 states have internal predecessors, (729), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 906 transitions. [2021-11-13 01:31:43,861 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 906 transitions. Word has length 105 [2021-11-13 01:31:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:43,862 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 906 transitions. [2021-11-13 01:31:43,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 906 transitions. [2021-11-13 01:31:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:31:43,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:43,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:43,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-13 01:31:44,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:44,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1097489107, now seen corresponding path program 1 times [2021-11-13 01:31:44,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:44,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107944015] [2021-11-13 01:31:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:44,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:44,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:44,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:31:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:44,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:31:45,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:45,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107944015] [2021-11-13 01:31:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107944015] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:45,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:45,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:31:45,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985168034] [2021-11-13 01:31:45,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:45,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:31:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:31:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:31:45,500 INFO L87 Difference]: Start difference. First operand 546 states and 906 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:45,777 INFO L93 Difference]: Finished difference Result 1091 states and 1821 transitions. [2021-11-13 01:31:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-13 01:31:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:45,787 INFO L225 Difference]: With dead ends: 1091 [2021-11-13 01:31:45,787 INFO L226 Difference]: Without dead ends: 567 [2021-11-13 01:31:45,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 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 01:31:45,792 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 148 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:45,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5233 Invalid, 85 Unknown, 0 Unchecked, 14.45ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 188.61ms Time] [2021-11-13 01:31:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-13 01:31:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2021-11-13 01:31:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 448 states have (on average 1.6852678571428572) internal successors, (755), 469 states have internal predecessors, (755), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-11-13 01:31:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 937 transitions. [2021-11-13 01:31:45,830 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 937 transitions. Word has length 106 [2021-11-13 01:31:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:45,831 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 937 transitions. [2021-11-13 01:31:45,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 937 transitions. [2021-11-13 01:31:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:31:45,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:45,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:31:45,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:46,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:46,046 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1482855890, now seen corresponding path program 1 times [2021-11-13 01:31:46,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:46,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697555071] [2021-11-13 01:31:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:46,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:46,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:46,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:31:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:31:46,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:47,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:47,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697555071] [2021-11-13 01:31:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697555071] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:47,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:47,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 01:31:47,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399601594] [2021-11-13 01:31:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:47,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:47,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:31:47,351 INFO L87 Difference]: Start difference. First operand 565 states and 937 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:47,491 INFO L93 Difference]: Finished difference Result 1104 states and 1843 transitions. [2021-11-13 01:31:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-13 01:31:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:47,501 INFO L225 Difference]: With dead ends: 1104 [2021-11-13 01:31:47,501 INFO L226 Difference]: Without dead ends: 561 [2021-11-13 01:31:47,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 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 01:31:47,506 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 8 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.75ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:47,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2666 Invalid, 30 Unknown, 0 Unchecked, 16.75ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 73.41ms Time] [2021-11-13 01:31:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-13 01:31:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-13 01:31:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 446 states have (on average 1.6860986547085202) internal successors, (752), 466 states have internal predecessors, (752), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-13 01:31:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 930 transitions. [2021-11-13 01:31:47,543 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 930 transitions. Word has length 106 [2021-11-13 01:31:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 930 transitions. [2021-11-13 01:31:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 930 transitions. [2021-11-13 01:31:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 01:31:47,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:47,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:47,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:47,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:47,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 640879348, now seen corresponding path program 1 times [2021-11-13 01:31:47,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:47,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989693444] [2021-11-13 01:31:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:47,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:47,777 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:31:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:48,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:48,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:48,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989693444] [2021-11-13 01:31:48,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989693444] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:48,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:48,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:48,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699199814] [2021-11-13 01:31:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:48,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:48,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:48,939 INFO L87 Difference]: Start difference. First operand 561 states and 930 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:49,199 INFO L93 Difference]: Finished difference Result 1130 states and 1888 transitions. [2021-11-13 01:31:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-13 01:31:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:49,208 INFO L225 Difference]: With dead ends: 1130 [2021-11-13 01:31:49,208 INFO L226 Difference]: Without dead ends: 561 [2021-11-13 01:31:49,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:49,213 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 134 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.99ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.80ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:49,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2474 Invalid, 131 Unknown, 0 Unchecked, 7.99ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 204.80ms Time] [2021-11-13 01:31:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-13 01:31:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-13 01:31:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 446 states have (on average 1.6748878923766817) internal successors, (747), 466 states have internal predecessors, (747), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-13 01:31:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 925 transitions. [2021-11-13 01:31:49,245 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 925 transitions. Word has length 107 [2021-11-13 01:31:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:49,246 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 925 transitions. [2021-11-13 01:31:49,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 925 transitions. [2021-11-13 01:31:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 01:31:49,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:49,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:49,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:49,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:49,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1843845440, now seen corresponding path program 1 times [2021-11-13 01:31:49,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:49,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741032280] [2021-11-13 01:31:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:49,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:49,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:49,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:31:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:50,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:50,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:50,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741032280] [2021-11-13 01:31:50,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741032280] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:50,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:50,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:50,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831133940] [2021-11-13 01:31:50,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:50,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:50,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:50,586 INFO L87 Difference]: Start difference. First operand 561 states and 925 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:50,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:50,792 INFO L93 Difference]: Finished difference Result 1130 states and 1878 transitions. [2021-11-13 01:31:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-13 01:31:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:50,801 INFO L225 Difference]: With dead ends: 1130 [2021-11-13 01:31:50,802 INFO L226 Difference]: Without dead ends: 561 [2021-11-13 01:31:50,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:50,806 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 128 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.82ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:50,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2474 Invalid, 121 Unknown, 0 Unchecked, 6.82ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 159.29ms Time] [2021-11-13 01:31:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-13 01:31:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-13 01:31:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 446 states have (on average 1.663677130044843) internal successors, (742), 466 states have internal predecessors, (742), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-13 01:31:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 920 transitions. [2021-11-13 01:31:50,843 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 920 transitions. Word has length 109 [2021-11-13 01:31:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:50,843 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 920 transitions. [2021-11-13 01:31:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 920 transitions. [2021-11-13 01:31:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:31:50,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:50,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:50,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:51,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:51,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -547624556, now seen corresponding path program 1 times [2021-11-13 01:31:51,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:51,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952434513] [2021-11-13 01:31:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:51,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:51,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:51,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:51,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:31:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:51,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:52,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:52,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952434513] [2021-11-13 01:31:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952434513] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:52,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:52,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383839774] [2021-11-13 01:31:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:52,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:52,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:52,144 INFO L87 Difference]: Start difference. First operand 561 states and 920 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:52,385 INFO L93 Difference]: Finished difference Result 1151 states and 1899 transitions. [2021-11-13 01:31:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-13 01:31:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:52,392 INFO L225 Difference]: With dead ends: 1151 [2021-11-13 01:31:52,393 INFO L226 Difference]: Without dead ends: 591 [2021-11-13 01:31:52,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:52,397 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 143 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:52,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2484 Invalid, 131 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 191.38ms Time] [2021-11-13 01:31:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-13 01:31:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2021-11-13 01:31:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 461 states have (on average 1.6420824295010845) internal successors, (757), 480 states have internal predecessors, (757), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 934 transitions. [2021-11-13 01:31:52,421 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 934 transitions. Word has length 111 [2021-11-13 01:31:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:52,422 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 934 transitions. [2021-11-13 01:31:52,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 934 transitions. [2021-11-13 01:31:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:31:52,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:52,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:52,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:52,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash -947806956, now seen corresponding path program 1 times [2021-11-13 01:31:52,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:52,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814907323] [2021-11-13 01:31:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:52,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:52,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:52,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:31:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:31:53,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:53,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814907323] [2021-11-13 01:31:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814907323] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:53,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:53,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:31:53,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974631191] [2021-11-13 01:31:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:53,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:31:53,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:31:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:31:53,822 INFO L87 Difference]: Start difference. First operand 576 states and 934 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:54,054 INFO L93 Difference]: Finished difference Result 1115 states and 1820 transitions. [2021-11-13 01:31:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-13 01:31:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:54,062 INFO L225 Difference]: With dead ends: 1115 [2021-11-13 01:31:54,062 INFO L226 Difference]: Without dead ends: 570 [2021-11-13 01:31:54,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 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 01:31:54,068 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 131 mSDsluCounter, 4308 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5201 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:54,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5201 Invalid, 75 Unknown, 0 Unchecked, 9.49ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 165.60ms Time] [2021-11-13 01:31:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-13 01:31:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 555. [2021-11-13 01:31:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 440 states have (on average 1.6363636363636365) internal successors, (720), 459 states have internal predecessors, (720), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 897 transitions. [2021-11-13 01:31:54,091 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 897 transitions. Word has length 111 [2021-11-13 01:31:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 897 transitions. [2021-11-13 01:31:54,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 897 transitions. [2021-11-13 01:31:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 01:31:54,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:54,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:54,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:54,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:54,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1433254134, now seen corresponding path program 1 times [2021-11-13 01:31:54,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:54,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143350504] [2021-11-13 01:31:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:54,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:54,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:54,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:54,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:31:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:55,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:55,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:55,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143350504] [2021-11-13 01:31:55,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143350504] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:55,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:55,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:55,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101524281] [2021-11-13 01:31:55,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:55,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:55,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:55,341 INFO L87 Difference]: Start difference. First operand 555 states and 897 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:55,481 INFO L93 Difference]: Finished difference Result 1079 states and 1758 transitions. [2021-11-13 01:31:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-13 01:31:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:55,488 INFO L225 Difference]: With dead ends: 1079 [2021-11-13 01:31:55,488 INFO L226 Difference]: Without dead ends: 555 [2021-11-13 01:31:55,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:55,492 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 69 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.01ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:55,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2498 Invalid, 54 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 105.01ms Time] [2021-11-13 01:31:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-13 01:31:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-13 01:31:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 440 states have (on average 1.634090909090909) internal successors, (719), 459 states have internal predecessors, (719), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 896 transitions. [2021-11-13 01:31:55,514 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 896 transitions. Word has length 112 [2021-11-13 01:31:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:55,515 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 896 transitions. [2021-11-13 01:31:55,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 896 transitions. [2021-11-13 01:31:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:31:55,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:55,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:55,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:55,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:55,742 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1373343697, now seen corresponding path program 1 times [2021-11-13 01:31:55,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:55,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216340097] [2021-11-13 01:31:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:55,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:55,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:55,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:31:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:56,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:56,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216340097] [2021-11-13 01:31:56,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216340097] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:56,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:56,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:31:56,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512344912] [2021-11-13 01:31:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:56,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:56,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:56,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:56,767 INFO L87 Difference]: Start difference. First operand 555 states and 896 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:56,907 INFO L93 Difference]: Finished difference Result 1079 states and 1757 transitions. [2021-11-13 01:31:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-13 01:31:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:56,915 INFO L225 Difference]: With dead ends: 1079 [2021-11-13 01:31:56,915 INFO L226 Difference]: Without dead ends: 555 [2021-11-13 01:31:56,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:56,920 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 67 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:56,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2498 Invalid, 52 Unknown, 0 Unchecked, 4.99ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 101.85ms Time] [2021-11-13 01:31:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-13 01:31:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-13 01:31:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 440 states have (on average 1.6318181818181818) internal successors, (718), 459 states have internal predecessors, (718), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 895 transitions. [2021-11-13 01:31:56,947 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 895 transitions. Word has length 113 [2021-11-13 01:31:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:56,947 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 895 transitions. [2021-11-13 01:31:56,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:31:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 895 transitions. [2021-11-13 01:31:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:31:56,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:56,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:31:56,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:57,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:57,165 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2066463867, now seen corresponding path program 1 times [2021-11-13 01:31:57,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:57,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618000407] [2021-11-13 01:31:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:57,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:57,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:57,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:57,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:31:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:31:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:31:58,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:58,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618000407] [2021-11-13 01:31:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618000407] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:58,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:31:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570431168] [2021-11-13 01:31:58,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:58,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:58,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:31:58,484 INFO L87 Difference]: Start difference. First operand 555 states and 895 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:58,767 INFO L93 Difference]: Finished difference Result 1084 states and 1764 transitions. [2021-11-13 01:31:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:31:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-13 01:31:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:58,773 INFO L225 Difference]: With dead ends: 1084 [2021-11-13 01:31:58,774 INFO L226 Difference]: Without dead ends: 566 [2021-11-13 01:31:58,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 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 01:31:58,779 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 109 mSDsluCounter, 4958 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5795 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:58,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5795 Invalid, 152 Unknown, 0 Unchecked, 9.42ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 198.30ms Time] [2021-11-13 01:31:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-13 01:31:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2021-11-13 01:31:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 442 states have (on average 1.6266968325791855) internal successors, (719), 461 states have internal predecessors, (719), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:31:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 896 transitions. [2021-11-13 01:31:58,808 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 896 transitions. Word has length 114 [2021-11-13 01:31:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 896 transitions. [2021-11-13 01:31:58,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:31:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 896 transitions. [2021-11-13 01:31:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 01:31:58,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:58,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-13 01:31:58,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:59,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:59,034 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1696614406, now seen corresponding path program 1 times [2021-11-13 01:31:59,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:59,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140648757] [2021-11-13 01:31:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:59,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:59,039 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:59,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:31:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:31:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:32:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:00,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:00,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140648757] [2021-11-13 01:32:00,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140648757] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:00,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:00,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:32:00,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836421417] [2021-11-13 01:32:00,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:32:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:32:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:00,550 INFO L87 Difference]: Start difference. First operand 557 states and 896 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:32:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:00,823 INFO L93 Difference]: Finished difference Result 1076 states and 1745 transitions. [2021-11-13 01:32:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:32:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-13 01:32:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:00,829 INFO L225 Difference]: With dead ends: 1076 [2021-11-13 01:32:00,829 INFO L226 Difference]: Without dead ends: 562 [2021-11-13 01:32:00,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 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 01:32:00,832 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 77 mSDsluCounter, 4964 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5803 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:00,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5803 Invalid, 152 Unknown, 0 Unchecked, 7.53ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 190.34ms Time] [2021-11-13 01:32:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-13 01:32:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2021-11-13 01:32:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 444 states have (on average 1.6216216216216217) internal successors, (720), 463 states have internal predecessors, (720), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 897 transitions. [2021-11-13 01:32:00,856 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 897 transitions. Word has length 115 [2021-11-13 01:32:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:00,856 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 897 transitions. [2021-11-13 01:32:00,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:32:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 897 transitions. [2021-11-13 01:32:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:32:00,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:00,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-13 01:32:00,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:01,084 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1430721647, now seen corresponding path program 1 times [2021-11-13 01:32:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:01,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172152269] [2021-11-13 01:32:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:01,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:01,086 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:01,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:32:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:01,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:02,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:02,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172152269] [2021-11-13 01:32:02,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172152269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:02,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:02,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:32:02,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950515950] [2021-11-13 01:32:02,130 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:02,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:32:02,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:32:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:32:02,131 INFO L87 Difference]: Start difference. First operand 559 states and 897 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:02,342 INFO L93 Difference]: Finished difference Result 1022 states and 1672 transitions. [2021-11-13 01:32:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:32:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-13 01:32:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:02,348 INFO L225 Difference]: With dead ends: 1022 [2021-11-13 01:32:02,348 INFO L226 Difference]: Without dead ends: 552 [2021-11-13 01:32:02,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 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 01:32:02,353 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 56 mSDsluCounter, 5836 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6687 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:02,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6687 Invalid, 103 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 132.16ms Time] [2021-11-13 01:32:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-13 01:32:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-13 01:32:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 437 states have (on average 1.6292906178489703) internal successors, (712), 456 states have internal predecessors, (712), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 889 transitions. [2021-11-13 01:32:02,376 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 889 transitions. Word has length 116 [2021-11-13 01:32:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:02,376 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 889 transitions. [2021-11-13 01:32:02,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 889 transitions. [2021-11-13 01:32:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:32:02,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:02,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:02,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:02,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:02,605 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:02,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1470782170, now seen corresponding path program 1 times [2021-11-13 01:32:02,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:02,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123341926] [2021-11-13 01:32:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:02,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:02,608 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:02,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:32:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:03,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:03,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:03,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123341926] [2021-11-13 01:32:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123341926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:03,986 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:03,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:32:03,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824112470] [2021-11-13 01:32:03,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:03,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:32:03,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:32:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:32:03,989 INFO L87 Difference]: Start difference. First operand 552 states and 889 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:04,175 INFO L93 Difference]: Finished difference Result 1027 states and 1686 transitions. [2021-11-13 01:32:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:32:04,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-13 01:32:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:04,182 INFO L225 Difference]: With dead ends: 1027 [2021-11-13 01:32:04,182 INFO L226 Difference]: Without dead ends: 549 [2021-11-13 01:32:04,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 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 01:32:04,186 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 170 mSDsluCounter, 4197 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.49ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:04,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5040 Invalid, 79 Unknown, 0 Unchecked, 6.81ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 137.49ms Time] [2021-11-13 01:32:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-13 01:32:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-13 01:32:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 434 states have (on average 1.6290322580645162) internal successors, (707), 453 states have internal predecessors, (707), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 884 transitions. [2021-11-13 01:32:04,210 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 884 transitions. Word has length 117 [2021-11-13 01:32:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:04,211 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 884 transitions. [2021-11-13 01:32:04,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 884 transitions. [2021-11-13 01:32:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:32:04,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:04,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-13 01:32:04,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:04,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:04,442 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:04,442 INFO L85 PathProgramCache]: Analyzing trace with hash -132578906, now seen corresponding path program 1 times [2021-11-13 01:32:04,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:04,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250224774] [2021-11-13 01:32:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:04,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:04,444 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:04,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:32:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:05,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:05,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:05,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250224774] [2021-11-13 01:32:05,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250224774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:05,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:05,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:32:05,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145653196] [2021-11-13 01:32:05,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:05,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:32:05,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:32:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:32:05,599 INFO L87 Difference]: Start difference. First operand 549 states and 884 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:32:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:05,780 INFO L93 Difference]: Finished difference Result 1024 states and 1681 transitions. [2021-11-13 01:32:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:32:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-13 01:32:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:05,787 INFO L225 Difference]: With dead ends: 1024 [2021-11-13 01:32:05,787 INFO L226 Difference]: Without dead ends: 541 [2021-11-13 01:32:05,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 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 01:32:05,791 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 105 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5789 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.39ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:05,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5789 Invalid, 73 Unknown, 0 Unchecked, 7.39ms Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 133.77ms Time] [2021-11-13 01:32:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-13 01:32:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-13 01:32:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 426 states have (on average 1.6338028169014085) internal successors, (696), 445 states have internal predecessors, (696), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 873 transitions. [2021-11-13 01:32:05,816 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 873 transitions. Word has length 117 [2021-11-13 01:32:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:05,817 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 873 transitions. [2021-11-13 01:32:05,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:32:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 873 transitions. [2021-11-13 01:32:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 01:32:05,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:05,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-13 01:32:05,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:06,046 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 279574131, now seen corresponding path program 1 times [2021-11-13 01:32:06,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:06,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317195992] [2021-11-13 01:32:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:06,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:06,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:06,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:32:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:32:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:06,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:07,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:07,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317195992] [2021-11-13 01:32:07,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317195992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:07,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:07,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:32:07,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753593386] [2021-11-13 01:32:07,328 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:07,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:32:07,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:07,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:32:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:07,330 INFO L87 Difference]: Start difference. First operand 541 states and 873 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:07,604 INFO L93 Difference]: Finished difference Result 1010 states and 1659 transitions. [2021-11-13 01:32:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:32:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-13 01:32:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:07,610 INFO L225 Difference]: With dead ends: 1010 [2021-11-13 01:32:07,610 INFO L226 Difference]: Without dead ends: 541 [2021-11-13 01:32:07,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 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 01:32:07,614 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 100 mSDsluCounter, 6623 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7461 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.66ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.44ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:07,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 7461 Invalid, 148 Unknown, 0 Unchecked, 8.66ms Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 203.44ms Time] [2021-11-13 01:32:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-13 01:32:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-13 01:32:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 426 states have (on average 1.6314553990610328) internal successors, (695), 445 states have internal predecessors, (695), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 872 transitions. [2021-11-13 01:32:07,640 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 872 transitions. Word has length 118 [2021-11-13 01:32:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 872 transitions. [2021-11-13 01:32:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 872 transitions. [2021-11-13 01:32:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:32:07,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:07,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:07,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:07,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:07,861 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1638177084, now seen corresponding path program 1 times [2021-11-13 01:32:07,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:07,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378810755] [2021-11-13 01:32:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:07,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:07,864 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:07,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:32:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:08,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:32:08,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:08,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:09,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:09,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378810755] [2021-11-13 01:32:09,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378810755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:09,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:09,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:32:09,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247384787] [2021-11-13 01:32:09,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:09,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:32:09,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:32:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:09,143 INFO L87 Difference]: Start difference. First operand 541 states and 872 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:09,353 INFO L93 Difference]: Finished difference Result 1054 states and 1716 transitions. [2021-11-13 01:32:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:32:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-13 01:32:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:09,361 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 01:32:09,361 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 01:32:09,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:32:09,366 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 191 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 4922 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.87ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.79ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:09,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 4922 Invalid, 96 Unknown, 0 Unchecked, 6.87ms Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 131.79ms Time] [2021-11-13 01:32:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 01:32:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-13 01:32:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 423 states have (on average 1.624113475177305) internal successors, (687), 442 states have internal predecessors, (687), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 864 transitions. [2021-11-13 01:32:09,431 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 864 transitions. Word has length 119 [2021-11-13 01:32:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:09,431 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 864 transitions. [2021-11-13 01:32:09,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 864 transitions. [2021-11-13 01:32:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 01:32:09,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:09,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-13 01:32:09,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:09,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:09,649 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2101596776, now seen corresponding path program 1 times [2021-11-13 01:32:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:09,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714437610] [2021-11-13 01:32:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:09,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:09,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:09,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:32:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:32:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:10,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:10,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:10,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714437610] [2021-11-13 01:32:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714437610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:10,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:10,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:32:10,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898209672] [2021-11-13 01:32:10,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:10,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:32:10,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:32:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:10,778 INFO L87 Difference]: Start difference. First operand 538 states and 864 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:10,992 INFO L93 Difference]: Finished difference Result 1001 states and 1639 transitions. [2021-11-13 01:32:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:32:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-13 01:32:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:10,999 INFO L225 Difference]: With dead ends: 1001 [2021-11-13 01:32:11,000 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 01:32:11,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 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 01:32:11,003 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 99 mSDsluCounter, 6583 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 7410 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:11,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 7410 Invalid, 156 Unknown, 0 Unchecked, 7.50ms Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 154.60ms Time] [2021-11-13 01:32:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 01:32:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-13 01:32:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 423 states have (on average 1.6217494089834514) internal successors, (686), 442 states have internal predecessors, (686), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 863 transitions. [2021-11-13 01:32:11,024 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 863 transitions. Word has length 120 [2021-11-13 01:32:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:11,025 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 863 transitions. [2021-11-13 01:32:11,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 863 transitions. [2021-11-13 01:32:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:32:11,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:11,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:11,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:11,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:11,252 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash 419160757, now seen corresponding path program 1 times [2021-11-13 01:32:11,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:11,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131095722] [2021-11-13 01:32:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:11,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:11,254 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:11,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:32:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:32:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:12,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:32:12,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:12,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131095722] [2021-11-13 01:32:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131095722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:12,599 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:12,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:32:12,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121406448] [2021-11-13 01:32:12,599 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:32:12,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:32:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:12,601 INFO L87 Difference]: Start difference. First operand 538 states and 863 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:12,927 INFO L93 Difference]: Finished difference Result 1039 states and 1684 transitions. [2021-11-13 01:32:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:32:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-13 01:32:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:12,938 INFO L225 Difference]: With dead ends: 1039 [2021-11-13 01:32:12,938 INFO L226 Difference]: Without dead ends: 535 [2021-11-13 01:32:12,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 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 01:32:12,943 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 106 mSDsluCounter, 6544 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7369 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.46ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:12,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 7369 Invalid, 140 Unknown, 0 Unchecked, 10.46ms Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 229.41ms Time] [2021-11-13 01:32:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-13 01:32:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-13 01:32:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.6142857142857143) internal successors, (678), 439 states have internal predecessors, (678), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-13 01:32:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 855 transitions. [2021-11-13 01:32:12,972 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 855 transitions. Word has length 121 [2021-11-13 01:32:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 855 transitions. [2021-11-13 01:32:12,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:32:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 855 transitions. [2021-11-13 01:32:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 01:32:12,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:12,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:13,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:13,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:13,203 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 425229181, now seen corresponding path program 1 times [2021-11-13 01:32:13,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:13,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620075110] [2021-11-13 01:32:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:13,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:13,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:13,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:32:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:13,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:32:13,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:14,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:15,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:15,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620075110] [2021-11-13 01:32:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620075110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:15,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:15,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 01:32:15,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474615121] [2021-11-13 01:32:15,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:15,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:32:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:32:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:32:15,643 INFO L87 Difference]: Start difference. First operand 535 states and 855 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 01:32:17,679 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 01:32:19,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:21,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:23,701 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 01:32:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:29,438 INFO L93 Difference]: Finished difference Result 1127 states and 1874 transitions. [2021-11-13 01:32:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:32:29,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-13 01:32:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:29,446 INFO L225 Difference]: With dead ends: 1127 [2021-11-13 01:32:29,447 INFO L226 Difference]: Without dead ends: 672 [2021-11-13 01:32:29,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:32:29,451 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 1563 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 3902 mSolverCounterSat, 596 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12849.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.53ms SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3902 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13536.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:29,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1563 Valid, 3436 Invalid, 4502 Unknown, 0 Unchecked, 41.53ms Time], IncrementalHoareTripleChecker [596 Valid, 3902 Invalid, 4 Unknown, 0 Unchecked, 13536.88ms Time] [2021-11-13 01:32:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-13 01:32:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 539. [2021-11-13 01:32:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 423 states have (on average 1.6099290780141844) internal successors, (681), 442 states have internal predecessors, (681), 91 states have call successors, (91), 24 states have call predecessors, (91), 24 states have return successors, (102), 85 states have call predecessors, (102), 86 states have call successors, (102) [2021-11-13 01:32:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 874 transitions. [2021-11-13 01:32:29,490 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 874 transitions. Word has length 122 [2021-11-13 01:32:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:29,491 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 874 transitions. [2021-11-13 01:32:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 01:32:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 874 transitions. [2021-11-13 01:32:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 01:32:29,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:29,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:29,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:29,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:29,722 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -237702470, now seen corresponding path program 1 times [2021-11-13 01:32:29,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:29,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092980883] [2021-11-13 01:32:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:29,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:29,724 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:29,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:32:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:30,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:32:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:30,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:31,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:31,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092980883] [2021-11-13 01:32:31,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092980883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:31,572 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:31,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 01:32:31,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563806586] [2021-11-13 01:32:31,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:31,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:32:31,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:32:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:31,574 INFO L87 Difference]: Start difference. First operand 539 states and 874 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-13 01:32:33,606 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 01:32:35,613 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 01:32:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:41,208 INFO L93 Difference]: Finished difference Result 1873 states and 3195 transitions. [2021-11-13 01:32:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:32:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-13 01:32:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:41,223 INFO L225 Difference]: With dead ends: 1873 [2021-11-13 01:32:41,223 INFO L226 Difference]: Without dead ends: 1414 [2021-11-13 01:32:41,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:32:41,229 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 4487 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 1274 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8515.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4562 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.46ms SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9309.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:41,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4562 Valid, 2980 Invalid, 5007 Unknown, 0 Unchecked, 30.46ms Time], IncrementalHoareTripleChecker [1274 Valid, 3731 Invalid, 2 Unknown, 0 Unchecked, 9309.25ms Time] [2021-11-13 01:32:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-11-13 01:32:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1326. [2021-11-13 01:32:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1035 states have (on average 1.6444444444444444) internal successors, (1702), 1083 states have internal predecessors, (1702), 232 states have call successors, (232), 57 states have call predecessors, (232), 58 states have return successors, (250), 222 states have call predecessors, (250), 227 states have call successors, (250) [2021-11-13 01:32:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2184 transitions. [2021-11-13 01:32:41,316 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2184 transitions. Word has length 123 [2021-11-13 01:32:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:41,316 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 2184 transitions. [2021-11-13 01:32:41,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-13 01:32:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2184 transitions. [2021-11-13 01:32:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:32:41,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:41,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:41,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:41,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:41,542 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1639966538, now seen corresponding path program 1 times [2021-11-13 01:32:41,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:41,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632374115] [2021-11-13 01:32:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:41,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:41,545 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:32:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:32:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:42,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:43,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:43,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632374115] [2021-11-13 01:32:43,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632374115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:43,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:43,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-13 01:32:43,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250853966] [2021-11-13 01:32:43,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:43,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 01:32:43,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 01:32:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:32:43,198 INFO L87 Difference]: Start difference. First operand 1326 states and 2184 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 01:32:45,224 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 01:32:47,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:57,393 INFO L93 Difference]: Finished difference Result 6676 states and 11578 transitions. [2021-11-13 01:32:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:32:57,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 125 [2021-11-13 01:32:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:57,447 INFO L225 Difference]: With dead ends: 6676 [2021-11-13 01:32:57,447 INFO L226 Difference]: Without dead ends: 5430 [2021-11-13 01:32:57,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:32:57,460 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 5636 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 6085 mSolverCounterSat, 2654 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12257.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5733 SdHoareTripleChecker+Valid, 4312 SdHoareTripleChecker+Invalid, 8741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.87ms SdHoareTripleChecker+Time, 2654 IncrementalHoareTripleChecker+Valid, 6085 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13543.77ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:57,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5733 Valid, 4312 Invalid, 8741 Unknown, 0 Unchecked, 49.87ms Time], IncrementalHoareTripleChecker [2654 Valid, 6085 Invalid, 2 Unknown, 0 Unchecked, 13543.77ms Time] [2021-11-13 01:32:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-11-13 01:32:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3111. [2021-11-13 01:32:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2314 states have (on average 1.6391529818496111) internal successors, (3793), 2460 states have internal predecessors, (3793), 677 states have call successors, (677), 106 states have call predecessors, (677), 119 states have return successors, (772), 666 states have call predecessors, (772), 672 states have call successors, (772) [2021-11-13 01:32:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5242 transitions. [2021-11-13 01:32:57,841 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5242 transitions. Word has length 125 [2021-11-13 01:32:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:57,842 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5242 transitions. [2021-11-13 01:32:57,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 01:32:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5242 transitions. [2021-11-13 01:32:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:32:57,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:57,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:32:57,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:58,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:58,070 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash -205400628, now seen corresponding path program 1 times [2021-11-13 01:32:58,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:58,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136434107] [2021-11-13 01:32:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:58,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:58,072 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:58,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 01:32:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:32:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:59,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:59,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:59,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136434107] [2021-11-13 01:32:59,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136434107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:59,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:59,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 01:32:59,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931429503] [2021-11-13 01:32:59,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:59,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:32:59,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:32:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:59,664 INFO L87 Difference]: Start difference. First operand 3111 states and 5242 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 01:33:01,697 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 01:33:03,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:09,790 INFO L93 Difference]: Finished difference Result 8317 states and 14190 transitions. [2021-11-13 01:33:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:33:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-13 01:33:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:09,861 INFO L225 Difference]: With dead ends: 8317 [2021-11-13 01:33:09,861 INFO L226 Difference]: Without dead ends: 6109 [2021-11-13 01:33:09,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:33:09,880 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 4068 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 3602 mSolverCounterSat, 997 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8626.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 4601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.69ms SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 3602 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9421.33ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:09,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 2644 Invalid, 4601 Unknown, 0 Unchecked, 29.69ms Time], IncrementalHoareTripleChecker [997 Valid, 3602 Invalid, 2 Unknown, 0 Unchecked, 9421.33ms Time] [2021-11-13 01:33:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-11-13 01:33:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5718. [2021-11-13 01:33:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 4273 states have (on average 1.6424058038848584) internal successors, (7018), 4546 states have internal predecessors, (7018), 1205 states have call successors, (1205), 190 states have call predecessors, (1205), 239 states have return successors, (1479), 1185 states have call predecessors, (1479), 1200 states have call successors, (1479) [2021-11-13 01:33:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 9702 transitions. [2021-11-13 01:33:10,497 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 9702 transitions. Word has length 125 [2021-11-13 01:33:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 5718 states and 9702 transitions. [2021-11-13 01:33:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 01:33:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 9702 transitions. [2021-11-13 01:33:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:33:10,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:10,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:33:10,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:10,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:10,723 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:10,724 INFO L85 PathProgramCache]: Analyzing trace with hash -782228256, now seen corresponding path program 1 times [2021-11-13 01:33:10,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:10,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311442159] [2021-11-13 01:33:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:10,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:10,726 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:10,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 01:33:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:33:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:33:11,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:33:13,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:13,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311442159] [2021-11-13 01:33:13,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311442159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:13,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:13,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-13 01:33:13,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171789642] [2021-11-13 01:33:13,029 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:13,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:33:13,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:33:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:33:13,031 INFO L87 Difference]: Start difference. First operand 5718 states and 9702 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 01:33:15,072 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 01:33:17,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:19,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:21,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:23,096 WARN L515 Checker$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 01:33:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:33,748 INFO L93 Difference]: Finished difference Result 15381 states and 26216 transitions. [2021-11-13 01:33:33,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:33:33,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-13 01:33:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:33,876 INFO L225 Difference]: With dead ends: 15381 [2021-11-13 01:33:33,876 INFO L226 Difference]: Without dead ends: 10466 [2021-11-13 01:33:33,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:33:33,903 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 3689 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 6704 mSolverCounterSat, 976 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18248.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3763 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 7685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.22ms SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 6704 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19489.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:33,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3763 Valid, 3764 Invalid, 7685 Unknown, 0 Unchecked, 44.22ms Time], IncrementalHoareTripleChecker [976 Valid, 6704 Invalid, 5 Unknown, 0 Unchecked, 19489.03ms Time] [2021-11-13 01:33:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2021-11-13 01:33:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 10172. [2021-11-13 01:33:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10172 states, 7573 states have (on average 1.6336986663145385) internal successors, (12372), 8054 states have internal predecessors, (12372), 2161 states have call successors, (2161), 348 states have call predecessors, (2161), 437 states have return successors, (2669), 2129 states have call predecessors, (2669), 2156 states have call successors, (2669) [2021-11-13 01:33:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 17202 transitions. [2021-11-13 01:33:34,925 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 17202 transitions. Word has length 130 [2021-11-13 01:33:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:34,925 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 17202 transitions. [2021-11-13 01:33:34,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 01:33:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 17202 transitions. [2021-11-13 01:33:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 01:33:34,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:34,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:33:34,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:35,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:35,149 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 8992208, now seen corresponding path program 1 times [2021-11-13 01:33:35,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:35,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583944274] [2021-11-13 01:33:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:35,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:35,153 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:35,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 01:33:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:33:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:33:36,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:33:36,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:36,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583944274] [2021-11-13 01:33:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583944274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:36,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:33:36,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494546111] [2021-11-13 01:33:36,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:33:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:33:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:33:36,767 INFO L87 Difference]: Start difference. First operand 10172 states and 17202 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:33:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:37,630 INFO L93 Difference]: Finished difference Result 20073 states and 34216 transitions. [2021-11-13 01:33:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:33:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-13 01:33:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:37,720 INFO L225 Difference]: With dead ends: 20073 [2021-11-13 01:33:37,720 INFO L226 Difference]: Without dead ends: 10172 [2021-11-13 01:33:37,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:33:37,762 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 234 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:37,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3174 Invalid, 101 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 105.69ms Time] [2021-11-13 01:33:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-11-13 01:33:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 10172. [2021-11-13 01:33:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10172 states, 7573 states have (on average 1.6173247061930542) internal successors, (12248), 8054 states have internal predecessors, (12248), 2161 states have call successors, (2161), 348 states have call predecessors, (2161), 437 states have return successors, (2669), 2129 states have call predecessors, (2669), 2156 states have call successors, (2669) [2021-11-13 01:33:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 17078 transitions. [2021-11-13 01:33:38,661 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 17078 transitions. Word has length 137 [2021-11-13 01:33:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:38,662 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 17078 transitions. [2021-11-13 01:33:38,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:33:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 17078 transitions. [2021-11-13 01:33:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:33:38,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:38,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:33:38,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:38,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:38,881 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:38,882 INFO L85 PathProgramCache]: Analyzing trace with hash 678755259, now seen corresponding path program 1 times [2021-11-13 01:33:38,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:38,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198147383] [2021-11-13 01:33:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:38,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:38,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:38,885 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:38,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 01:33:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:33:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:33:40,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:33:40,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:40,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198147383] [2021-11-13 01:33:40,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198147383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:40,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:40,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-13 01:33:40,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475467295] [2021-11-13 01:33:40,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:40,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:33:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:33:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:33:40,994 INFO L87 Difference]: Start difference. First operand 10172 states and 17078 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:33:43,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:45,036 WARN L515 Checker$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 01:33:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:50,512 INFO L93 Difference]: Finished difference Result 20203 states and 33992 transitions. [2021-11-13 01:33:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 01:33:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-13 01:33:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:50,696 INFO L225 Difference]: With dead ends: 20203 [2021-11-13 01:33:50,697 INFO L226 Difference]: Without dead ends: 11047 [2021-11-13 01:33:50,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:33:50,733 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 4101 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 1059 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7911.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.03ms SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8549.46ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:50,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4177 Valid, 2114 Invalid, 3921 Unknown, 0 Unchecked, 27.03ms Time], IncrementalHoareTripleChecker [1059 Valid, 2860 Invalid, 2 Unknown, 0 Unchecked, 8549.46ms Time] [2021-11-13 01:33:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2021-11-13 01:33:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 10532. [2021-11-13 01:33:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 7845 states have (on average 1.6076481835564054) internal successors, (12612), 8346 states have internal predecessors, (12612), 2199 states have call successors, (2199), 380 states have call predecessors, (2199), 487 states have return successors, (2755), 2165 states have call predecessors, (2755), 2194 states have call successors, (2755) [2021-11-13 01:33:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 17566 transitions. [2021-11-13 01:33:51,791 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 17566 transitions. Word has length 142 [2021-11-13 01:33:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:51,792 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 17566 transitions. [2021-11-13 01:33:51,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:33:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 17566 transitions. [2021-11-13 01:33:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 01:33:51,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:51,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:33:51,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:51,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:51,996 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1158368213, now seen corresponding path program 1 times [2021-11-13 01:33:51,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:51,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010823745] [2021-11-13 01:33:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:51,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:51,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:51,998 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:51,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 01:33:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:33:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:33:53,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:33:54,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:54,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010823745] [2021-11-13 01:33:54,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010823745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:54,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:54,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:33:54,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517351785] [2021-11-13 01:33:54,314 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:54,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:33:54,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:33:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:33:54,316 INFO L87 Difference]: Start difference. First operand 10532 states and 17566 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 01:33:56,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:58,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:09,406 INFO L93 Difference]: Finished difference Result 28180 states and 47430 transitions. [2021-11-13 01:34:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:34:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-13 01:34:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:09,575 INFO L225 Difference]: With dead ends: 28180 [2021-11-13 01:34:09,575 INFO L226 Difference]: Without dead ends: 18661 [2021-11-13 01:34:09,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:34:09,630 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3201 mSDsluCounter, 2707 mSDsCounter, 0 mSdLazyCounter, 6529 mSolverCounterSat, 853 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12060.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 7384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.64ms SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 6529 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13307.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:09,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3272 Valid, 3581 Invalid, 7384 Unknown, 0 Unchecked, 43.64ms Time], IncrementalHoareTripleChecker [853 Valid, 6529 Invalid, 2 Unknown, 0 Unchecked, 13307.13ms Time] [2021-11-13 01:34:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18661 states. [2021-11-13 01:34:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18661 to 18587. [2021-11-13 01:34:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18587 states, 13816 states have (on average 1.6176172553561088) internal successors, (22349), 14670 states have internal predecessors, (22349), 3973 states have call successors, (3973), 684 states have call predecessors, (3973), 797 states have return successors, (4830), 3912 states have call predecessors, (4830), 3968 states have call successors, (4830) [2021-11-13 01:34:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18587 states to 18587 states and 31152 transitions. [2021-11-13 01:34:11,397 INFO L78 Accepts]: Start accepts. Automaton has 18587 states and 31152 transitions. Word has length 147 [2021-11-13 01:34:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 18587 states and 31152 transitions. [2021-11-13 01:34:11,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 01:34:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18587 states and 31152 transitions. [2021-11-13 01:34:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 01:34:11,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:11,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:11,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:11,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:11,616 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1292381719, now seen corresponding path program 1 times [2021-11-13 01:34:11,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:11,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784685282] [2021-11-13 01:34:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:11,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:11,620 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:11,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 01:34:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:34:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:34:13,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:34:14,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784685282] [2021-11-13 01:34:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784685282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:14,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:14,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:34:14,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109549238] [2021-11-13 01:34:14,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:14,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:34:14,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:34:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:34:14,220 INFO L87 Difference]: Start difference. First operand 18587 states and 31152 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:34:16,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:18,267 WARN L515 Checker$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 01:34:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:28,659 INFO L93 Difference]: Finished difference Result 47302 states and 80167 transitions. [2021-11-13 01:34:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 01:34:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-13 01:34:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:28,881 INFO L225 Difference]: With dead ends: 47302 [2021-11-13 01:34:28,881 INFO L226 Difference]: Without dead ends: 28201 [2021-11-13 01:34:29,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:34:29,009 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 3011 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 5144 mSolverCounterSat, 804 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11064.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 5950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.79ms SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 5144 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12076.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:29,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3103 Valid, 3156 Invalid, 5950 Unknown, 0 Unchecked, 34.79ms Time], IncrementalHoareTripleChecker [804 Valid, 5144 Invalid, 2 Unknown, 0 Unchecked, 12076.38ms Time] [2021-11-13 01:34:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28201 states. [2021-11-13 01:34:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28201 to 26909. [2021-11-13 01:34:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26909 states, 19930 states have (on average 1.6129954841946814) internal successors, (32147), 21257 states have internal predecessors, (32147), 5829 states have call successors, (5829), 1017 states have call predecessors, (5829), 1149 states have return successors, (7146), 5634 states have call predecessors, (7146), 5824 states have call successors, (7146) [2021-11-13 01:34:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26909 states to 26909 states and 45122 transitions. [2021-11-13 01:34:31,859 INFO L78 Accepts]: Start accepts. Automaton has 26909 states and 45122 transitions. Word has length 147 [2021-11-13 01:34:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:31,860 INFO L470 AbstractCegarLoop]: Abstraction has 26909 states and 45122 transitions. [2021-11-13 01:34:31,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:34:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 26909 states and 45122 transitions. [2021-11-13 01:34:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:34:31,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:31,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:31,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:32,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:32,082 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1304047454, now seen corresponding path program 1 times [2021-11-13 01:34:32,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:32,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500306004] [2021-11-13 01:34:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:32,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:32,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:32,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 01:34:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:34:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:33,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:34,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:34,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500306004] [2021-11-13 01:34:34,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500306004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:34,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2108162618] [2021-11-13 01:34:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:34,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:34,129 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:34,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 01:34:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:34:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:35,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:35,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2108162618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:35,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137852177] [2021-11-13 01:34:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:35,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:35,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:35,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 01:34:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:34:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:36,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:34:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137852177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:37,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:34:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-13 01:34:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32601101] [2021-11-13 01:34:37,707 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:34:37,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:34:37,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:34:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:37,710 INFO L87 Difference]: Start difference. First operand 26909 states and 45122 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-13 01:34:39,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:41,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:43,756 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 01:34:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:55,966 INFO L93 Difference]: Finished difference Result 108222 states and 182734 transitions. [2021-11-13 01:34:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:34:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-13 01:34:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:56,792 INFO L225 Difference]: With dead ends: 108222 [2021-11-13 01:34:56,792 INFO L226 Difference]: Without dead ends: 81391 [2021-11-13 01:34:56,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:34:56,922 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 2309 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 4488 mSolverCounterSat, 636 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11522.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 5127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.11ms SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 4488 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12384.78ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:56,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2387 Valid, 2641 Invalid, 5127 Unknown, 0 Unchecked, 30.11ms Time], IncrementalHoareTripleChecker [636 Valid, 4488 Invalid, 3 Unknown, 0 Unchecked, 12384.78ms Time] [2021-11-13 01:34:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81391 states. [2021-11-13 01:35:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81391 to 80993. [2021-11-13 01:35:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80993 states, 60023 states have (on average 1.6087832997351015) internal successors, (96564), 64071 states have internal predecessors, (96564), 17431 states have call successors, (17431), 3053 states have call predecessors, (17431), 3538 states have return successors, (22326), 16868 states have call predecessors, (22326), 17426 states have call successors, (22326) [2021-11-13 01:35:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80993 states to 80993 states and 136321 transitions. [2021-11-13 01:35:04,574 INFO L78 Accepts]: Start accepts. Automaton has 80993 states and 136321 transitions. Word has length 148 [2021-11-13 01:35:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:04,578 INFO L470 AbstractCegarLoop]: Abstraction has 80993 states and 136321 transitions. [2021-11-13 01:35:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-13 01:35:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 80993 states and 136321 transitions. [2021-11-13 01:35:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 01:35:04,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:04,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:35:04,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:04,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:05,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-13 01:35:05,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:35:05,189 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1733510827, now seen corresponding path program 1 times [2021-11-13 01:35:05,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:05,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110968496] [2021-11-13 01:35:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:05,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:05,192 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:05,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8bc670-4220-40b3-a649-d79e00761b09/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 01:35:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:35:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:35:06,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:35:06,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:06,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110968496] [2021-11-13 01:35:06,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110968496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:06,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 01:35:06,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100639939] [2021-11-13 01:35:06,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:35:06,682 INFO L87 Difference]: Start difference. First operand 80993 states and 136321 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 01:35:08,720 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 01:35:10,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:21,953 INFO L93 Difference]: Finished difference Result 187865 states and 316303 transitions. [2021-11-13 01:35:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:35:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-13 01:35:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:22,822 INFO L225 Difference]: With dead ends: 187865 [2021-11-13 01:35:22,822 INFO L226 Difference]: Without dead ends: 109786 [2021-11-13 01:35:23,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:35:23,110 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 463 mSDsluCounter, 4277 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4925.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 5292 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.04ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5073.44ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:23,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 5292 Invalid, 540 Unknown, 0 Unchecked, 11.04ms Time], IncrementalHoareTripleChecker [18 Valid, 520 Invalid, 2 Unknown, 0 Unchecked, 5073.44ms Time] [2021-11-13 01:35:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109786 states.