./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/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_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 15:47:55,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:47:55,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:47:55,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:47:55,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:47:55,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:47:55,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:47:55,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:47:55,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:47:55,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:47:55,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:47:55,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:47:55,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:47:55,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:47:55,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:47:55,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:47:55,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:47:55,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:47:55,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:47:55,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:47:55,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:47:55,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:47:55,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:47:55,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:47:55,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:47:55,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:47:55,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:47:55,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:47:55,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:47:55,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:47:55,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:47:55,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:47:55,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:47:55,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:47:55,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:47:55,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:47:55,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:47:55,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:47:55,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:47:55,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:47:55,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:47:55,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:47:55,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:47:55,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:47:55,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:47:55,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:47:55,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:47:55,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:47:55,490 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:47:55,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:47:55,498 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:47:55,498 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:47:55,500 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:47:55,500 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:47:55,500 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:47:55,501 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:47:55,501 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:47:55,501 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:47:55,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:47:55,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:47:55,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:47:55,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:47:55,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:47:55,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:47:55,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:47:55,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:47:55,504 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:47:55,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:47:55,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:47:55,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:47:55,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:47:55,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:47:55,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:47:55,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:55,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:47:55,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:47:55,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:47:55,507 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:47:55,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:47:55,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:47:55,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:47:55,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:47:55,508 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_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-19 15:47:55,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:47:55,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:47:55,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:47:55,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:47:55,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:47:55,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-19 15:47:55,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/0380badba/6cd883e9f19b4e1aa55dc99ec0497e1a/FLAGc83129bb1 [2021-11-19 15:47:56,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:47:56,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-19 15:47:56,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/0380badba/6cd883e9f19b4e1aa55dc99ec0497e1a/FLAGc83129bb1 [2021-11-19 15:47:56,896 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/0380badba/6cd883e9f19b4e1aa55dc99ec0497e1a [2021-11-19 15:47:56,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:47:56,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:47:56,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:56,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:47:56,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:47:56,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:56" (1/1) ... [2021-11-19 15:47:56,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1832aa74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:56, skipping insertion in model container [2021-11-19 15:47:56,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:56" (1/1) ... [2021-11-19 15:47:56,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:47:56,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:47:57,359 WARN L230 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_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-19 15:47:57,781 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:57,800 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) [2021-11-19 15:47:57,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2268373f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:57, skipping insertion in model container [2021-11-19 15:47:57,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:57,802 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:47:57,806 INFO L158 Benchmark]: Toolchain (without parser) took 902.61ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 74.0MB in the beginning and 123.5MB in the end (delta: -49.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:47:57,807 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:47:57,810 INFO L158 Benchmark]: CACSL2BoogieTranslator took 899.26ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 73.8MB in the beginning and 123.5MB in the end (delta: -49.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:47:57,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 899.26ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 73.8MB in the beginning and 123.5MB in the end (delta: -49.7MB). Peak memory consumption was 14.7MB. 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_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/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_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 15:48:00,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:48:00,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:48:00,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:48:00,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:48:00,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:48:00,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:48:00,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:48:00,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:48:00,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:48:00,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:48:00,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:48:00,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:48:00,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:48:00,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:48:00,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:48:00,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:48:00,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:48:00,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:48:00,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:48:00,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:48:00,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:48:00,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:48:00,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:48:00,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:48:00,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:48:00,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:48:00,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:48:00,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:48:00,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:48:00,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:48:00,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:48:00,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:48:00,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:48:00,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:48:00,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:48:00,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:48:00,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:48:00,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:48:00,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:48:00,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:48:00,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:48:00,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:48:00,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:48:00,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:48:00,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:48:00,836 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:48:00,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:48:00,837 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:48:00,837 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:48:00,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:48:00,838 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:48:00,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:48:00,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:48:00,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:48:00,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:48:00,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:48:00,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:48:00,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:48:00,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:48:00,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:48:00,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:48:00,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:48:00,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:48:00,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:48:00,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:48:00,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:48:00,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:48:00,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:48:00,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:00,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:48:00,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:48:00,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:48:00,847 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:48:00,848 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:00,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:48:00,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:48:00,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:48:00,849 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_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-19 15:48:01,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:48:01,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:48:01,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:48:01,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:48:01,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:48:01,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-19 15:48:01,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/bbd174710/e9b9ac5d7b734cccbc09dcc2c3cc5a76/FLAGd8730e5d7 [2021-11-19 15:48:02,156 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:48:02,157 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-19 15:48:02,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/bbd174710/e9b9ac5d7b734cccbc09dcc2c3cc5a76/FLAGd8730e5d7 [2021-11-19 15:48:02,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/data/bbd174710/e9b9ac5d7b734cccbc09dcc2c3cc5a76 [2021-11-19 15:48:02,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:48:02,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:48:02,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:02,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:48:02,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:48:02,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:02" (1/1) ... [2021-11-19 15:48:02,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57da94d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:02, skipping insertion in model container [2021-11-19 15:48:02,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:02" (1/1) ... [2021-11-19 15:48:02,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:48:02,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:02,881 WARN L230 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_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-19 15:48:03,235 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:03,252 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:48:03,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:03,346 WARN L230 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_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-19 15:48:03,455 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:03,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:48:03,496 WARN L230 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_998e8591-5820-49f2-ad24-da00da435bb8/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-19 15:48:03,592 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:03,629 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:48:03,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03 WrapperNode [2021-11-19 15:48:03,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:03,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:03,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:48:03,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:48:03,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,762 INFO L137 Inliner]: procedures = 93, calls = 335, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 792 [2021-11-19 15:48:03,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:03,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:48:03,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:48:03,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:48:03,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:48:03,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:48:03,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:48:03,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:48:03,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (1/1) ... [2021-11-19 15:48:03,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:03,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:48:04,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:48:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 15:48:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 15:48:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:48:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 15:48:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 15:48:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:48:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:48:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:48:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:48:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:48:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:48:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:48:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:48:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:48:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:48:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:48:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:48:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 15:48:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 15:48:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 15:48:04,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 15:48:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:48:04,068 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:48:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:48:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:48:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:48:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:48:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:48:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:48:04,070 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:48:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:48:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:48:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:48:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:48:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:48:04,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:48:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:48:04,072 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:48:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:48:04,073 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:48:04,073 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:48:04,073 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:48:04,073 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:48:04,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:48:04,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:48:04,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:48:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:48:04,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:48:04,266 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:48:04,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:48:05,745 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:48:05,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:48:05,777 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:48:05,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:05 BoogieIcfgContainer [2021-11-19 15:48:05,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:48:05,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:48:05,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:48:05,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:48:05,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:48:02" (1/3) ... [2021-11-19 15:48:05,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:05, skipping insertion in model container [2021-11-19 15:48:05,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:03" (2/3) ... [2021-11-19 15:48:05,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:05, skipping insertion in model container [2021-11-19 15:48:05,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:05" (3/3) ... [2021-11-19 15:48:05,793 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2021-11-19 15:48:05,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:48:05,801 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:48:05,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:48:05,903 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 [2021-11-19 15:48:05,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:48:05,965 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) [2021-11-19 15:48:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 15:48:06,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:06,005 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] [2021-11-19 15:48:06,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1967759717, now seen corresponding path program 1 times [2021-11-19 15:48:06,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:06,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149473327] [2021-11-19 15:48:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:06,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:06,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:48:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:06,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:48:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 15:48:07,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 15:48:07,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:07,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149473327] [2021-11-19 15:48:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149473327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:07,443 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:07,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:48:07,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479598292] [2021-11-19 15:48:07,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:48:07,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:48:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:48:07,502 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) [2021-11-19 15:48:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:07,657 INFO L93 Difference]: Finished difference Result 569 states and 951 transitions. [2021-11-19 15:48:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:48:07,660 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 [2021-11-19 15:48:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:07,697 INFO L225 Difference]: With dead ends: 569 [2021-11-19 15:48:07,697 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 15:48:07,706 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 [2021-11-19 15:48:07,712 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:07,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 15:48:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 15:48:07,825 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) [2021-11-19 15:48:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 905 transitions. [2021-11-19 15:48:07,839 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 905 transitions. Word has length 97 [2021-11-19 15:48:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:07,843 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 905 transitions. [2021-11-19 15:48:07,843 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) [2021-11-19 15:48:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 905 transitions. [2021-11-19 15:48:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 15:48:07,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:07,865 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] [2021-11-19 15:48:07,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:08,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:08,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1542777770, now seen corresponding path program 1 times [2021-11-19 15:48:08,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:08,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316269877] [2021-11-19 15:48:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:08,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:08,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:08,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:08,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:48:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:08,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:09,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:09,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:09,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316269877] [2021-11-19 15:48:09,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316269877] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:09,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:09,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:09,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954160692] [2021-11-19 15:48:09,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:09,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:09,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:09,414 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) [2021-11-19 15:48:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:09,589 INFO L93 Difference]: Finished difference Result 1071 states and 1802 transitions. [2021-11-19 15:48:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:09,591 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 [2021-11-19 15:48:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:09,599 INFO L225 Difference]: With dead ends: 1071 [2021-11-19 15:48:09,599 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 15:48:09,613 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 [2021-11-19 15:48:09,615 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 14 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2666 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 15:48:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 15:48:09,669 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) [2021-11-19 15:48:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 904 transitions. [2021-11-19 15:48:09,679 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 904 transitions. Word has length 99 [2021-11-19 15:48:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:09,680 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 904 transitions. [2021-11-19 15:48:09,680 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) [2021-11-19 15:48:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 904 transitions. [2021-11-19 15:48:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 15:48:09,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:09,687 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] [2021-11-19 15:48:09,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:09,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1481525902, now seen corresponding path program 1 times [2021-11-19 15:48:09,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:09,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912775159] [2021-11-19 15:48:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:09,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:09,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:09,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:48:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:10,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:11,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:11,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912775159] [2021-11-19 15:48:11,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912775159] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:11,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:11,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:11,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275244574] [2021-11-19 15:48:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:11,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:11,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:11,052 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) [2021-11-19 15:48:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:11,150 INFO L93 Difference]: Finished difference Result 1071 states and 1800 transitions. [2021-11-19 15:48:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:11,152 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 [2021-11-19 15:48:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:11,159 INFO L225 Difference]: With dead ends: 1071 [2021-11-19 15:48:11,160 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 15:48:11,165 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 [2021-11-19 15:48:11,166 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 12 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:11,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2666 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 15:48:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 15:48:11,201 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) [2021-11-19 15:48:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 903 transitions. [2021-11-19 15:48:11,210 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 903 transitions. Word has length 101 [2021-11-19 15:48:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:11,210 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 903 transitions. [2021-11-19 15:48:11,211 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) [2021-11-19 15:48:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 903 transitions. [2021-11-19 15:48:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 15:48:11,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:11,217 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] [2021-11-19 15:48:11,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:11,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:11,442 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1026290454, now seen corresponding path program 1 times [2021-11-19 15:48:11,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:11,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504097131] [2021-11-19 15:48:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:11,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:11,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:11,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:48:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:12,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:12,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:12,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504097131] [2021-11-19 15:48:12,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504097131] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:12,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:12,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:12,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667977577] [2021-11-19 15:48:12,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:12,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:12,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:12,556 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) [2021-11-19 15:48:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:12,655 INFO L93 Difference]: Finished difference Result 1075 states and 1803 transitions. [2021-11-19 15:48:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:12,657 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 [2021-11-19 15:48:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:12,664 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 15:48:12,664 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 15:48:12,669 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 [2021-11-19 15:48:12,670 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 13 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2666 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 15:48:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 15:48:12,702 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) [2021-11-19 15:48:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 908 transitions. [2021-11-19 15:48:12,712 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 908 transitions. Word has length 103 [2021-11-19 15:48:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:12,713 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 908 transitions. [2021-11-19 15:48:12,714 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) [2021-11-19 15:48:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 908 transitions. [2021-11-19 15:48:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 15:48:12,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:12,720 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] [2021-11-19 15:48:12,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:12,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:12,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1866135415, now seen corresponding path program 1 times [2021-11-19 15:48:12,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:12,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478769036] [2021-11-19 15:48:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:12,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:12,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:12,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:48:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:14,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:14,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478769036] [2021-11-19 15:48:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478769036] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:14,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:14,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915915550] [2021-11-19 15:48:14,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:14,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:14,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:14,003 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) [2021-11-19 15:48:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:14,092 INFO L93 Difference]: Finished difference Result 1074 states and 1794 transitions. [2021-11-19 15:48:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:14,093 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 [2021-11-19 15:48:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:14,101 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 15:48:14,102 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 15:48:14,107 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 [2021-11-19 15:48:14,109 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 8 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:14,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2667 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 15:48:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 15:48:14,144 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) [2021-11-19 15:48:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 907 transitions. [2021-11-19 15:48:14,153 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 907 transitions. Word has length 104 [2021-11-19 15:48:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 907 transitions. [2021-11-19 15:48:14,154 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) [2021-11-19 15:48:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 907 transitions. [2021-11-19 15:48:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 15:48:14,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:14,165 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] [2021-11-19 15:48:14,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:14,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:14,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 621974734, now seen corresponding path program 1 times [2021-11-19 15:48:14,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:14,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751955254] [2021-11-19 15:48:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:14,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:14,392 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:14,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:48:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:15,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:15,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751955254] [2021-11-19 15:48:15,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751955254] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:15,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:15,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:15,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940407118] [2021-11-19 15:48:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:15,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:15,549 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) [2021-11-19 15:48:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:15,634 INFO L93 Difference]: Finished difference Result 1074 states and 1793 transitions. [2021-11-19 15:48:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:15,635 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 [2021-11-19 15:48:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:15,643 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 15:48:15,643 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 15:48:15,648 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 [2021-11-19 15:48:15,652 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 6 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:15,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2667 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 15:48:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 15:48:15,685 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) [2021-11-19 15:48:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 906 transitions. [2021-11-19 15:48:15,693 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 906 transitions. Word has length 105 [2021-11-19 15:48:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:15,694 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 906 transitions. [2021-11-19 15:48:15,694 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) [2021-11-19 15:48:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 906 transitions. [2021-11-19 15:48:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 15:48:15,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:15,703 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] [2021-11-19 15:48:15,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:15,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:15,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1097489107, now seen corresponding path program 1 times [2021-11-19 15:48:15,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:15,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840665783] [2021-11-19 15:48:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:15,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:15,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:15,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:48:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:17,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:17,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840665783] [2021-11-19 15:48:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840665783] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:17,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:17,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 15:48:17,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465407813] [2021-11-19 15:48:17,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:48:17,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:17,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:48:17,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:17,210 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) [2021-11-19 15:48:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:17,477 INFO L93 Difference]: Finished difference Result 1091 states and 1821 transitions. [2021-11-19 15:48:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:17,479 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 [2021-11-19 15:48:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:17,490 INFO L225 Difference]: With dead ends: 1091 [2021-11-19 15:48:17,490 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 15:48:17,494 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 [2021-11-19 15:48:17,496 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 148 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5233 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:17,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5233 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 15:48:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2021-11-19 15:48:17,526 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) [2021-11-19 15:48:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 937 transitions. [2021-11-19 15:48:17,533 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 937 transitions. Word has length 106 [2021-11-19 15:48:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:17,536 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 937 transitions. [2021-11-19 15:48:17,536 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) [2021-11-19 15:48:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 937 transitions. [2021-11-19 15:48:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 15:48:17,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:17,542 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] [2021-11-19 15:48:17,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:17,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:17,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1482855890, now seen corresponding path program 1 times [2021-11-19 15:48:17,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:17,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283216395] [2021-11-19 15:48:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:17,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:17,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:17,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:48:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:48:18,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:48:18,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:18,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283216395] [2021-11-19 15:48:18,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283216395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:18,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:18,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 15:48:18,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021350041] [2021-11-19 15:48:18,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:18,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:18,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:18,897 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) [2021-11-19 15:48:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:18,979 INFO L93 Difference]: Finished difference Result 1104 states and 1843 transitions. [2021-11-19 15:48:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:18,980 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 [2021-11-19 15:48:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:18,986 INFO L225 Difference]: With dead ends: 1104 [2021-11-19 15:48:18,987 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 15:48:18,991 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 [2021-11-19 15:48:18,992 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 8 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:18,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2666 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 15:48:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 15:48:19,016 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) [2021-11-19 15:48:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 930 transitions. [2021-11-19 15:48:19,024 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 930 transitions. Word has length 106 [2021-11-19 15:48:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:19,024 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 930 transitions. [2021-11-19 15:48:19,025 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) [2021-11-19 15:48:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 930 transitions. [2021-11-19 15:48:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 15:48:19,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:19,030 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] [2021-11-19 15:48:19,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:19,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 640879348, now seen corresponding path program 1 times [2021-11-19 15:48:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:19,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900671332] [2021-11-19 15:48:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:19,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:19,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:48:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:19,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:19,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:48:20,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:20,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900671332] [2021-11-19 15:48:20,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900671332] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:20,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:20,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:20,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039304665] [2021-11-19 15:48:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:20,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:20,320 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) [2021-11-19 15:48:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:20,608 INFO L93 Difference]: Finished difference Result 1130 states and 1888 transitions. [2021-11-19 15:48:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:20,611 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 [2021-11-19 15:48:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:20,619 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 15:48:20,620 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 15:48:20,624 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 [2021-11-19 15:48:20,627 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 134 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:20,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2474 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 15:48:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 15:48:20,654 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) [2021-11-19 15:48:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 925 transitions. [2021-11-19 15:48:20,663 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 925 transitions. Word has length 107 [2021-11-19 15:48:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:20,665 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 925 transitions. [2021-11-19 15:48:20,665 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) [2021-11-19 15:48:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 925 transitions. [2021-11-19 15:48:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 15:48:20,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:20,671 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] [2021-11-19 15:48:20,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:20,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:20,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1843845440, now seen corresponding path program 1 times [2021-11-19 15:48:20,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:20,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247561720] [2021-11-19 15:48:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:20,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:20,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:20,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:20,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:48:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:21,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:48:22,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:22,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247561720] [2021-11-19 15:48:22,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247561720] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:22,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:22,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:22,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666281705] [2021-11-19 15:48:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:22,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:22,058 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) [2021-11-19 15:48:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:22,276 INFO L93 Difference]: Finished difference Result 1130 states and 1878 transitions. [2021-11-19 15:48:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:22,278 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 [2021-11-19 15:48:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:22,285 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 15:48:22,285 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 15:48:22,289 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 [2021-11-19 15:48:22,290 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 128 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:22,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2474 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 15:48:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 15:48:22,315 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) [2021-11-19 15:48:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 920 transitions. [2021-11-19 15:48:22,323 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 920 transitions. Word has length 109 [2021-11-19 15:48:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:22,323 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 920 transitions. [2021-11-19 15:48:22,324 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) [2021-11-19 15:48:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 920 transitions. [2021-11-19 15:48:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:48:22,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:22,329 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] [2021-11-19 15:48:22,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:22,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:22,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -547624556, now seen corresponding path program 1 times [2021-11-19 15:48:22,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:22,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490744224] [2021-11-19 15:48:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:22,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:22,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:22,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:22,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:48:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:23,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:48:23,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:23,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490744224] [2021-11-19 15:48:23,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490744224] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:23,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:23,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:23,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272777242] [2021-11-19 15:48:23,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:23,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:23,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:23,680 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) [2021-11-19 15:48:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:23,913 INFO L93 Difference]: Finished difference Result 1151 states and 1899 transitions. [2021-11-19 15:48:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:23,915 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 [2021-11-19 15:48:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:23,922 INFO L225 Difference]: With dead ends: 1151 [2021-11-19 15:48:23,922 INFO L226 Difference]: Without dead ends: 591 [2021-11-19 15:48:23,926 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 [2021-11-19 15:48:23,927 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 143 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:23,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2484 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-19 15:48:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2021-11-19 15:48:23,954 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) [2021-11-19 15:48:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 934 transitions. [2021-11-19 15:48:23,960 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 934 transitions. Word has length 111 [2021-11-19 15:48:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:23,961 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 934 transitions. [2021-11-19 15:48:23,961 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) [2021-11-19 15:48:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 934 transitions. [2021-11-19 15:48:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:48:23,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:23,967 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] [2021-11-19 15:48:23,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:24,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:24,184 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash -947806956, now seen corresponding path program 1 times [2021-11-19 15:48:24,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:24,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268741042] [2021-11-19 15:48:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:24,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:24,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:24,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:48:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:24,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:25,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:25,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268741042] [2021-11-19 15:48:25,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268741042] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:25,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:25,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 15:48:25,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907684970] [2021-11-19 15:48:25,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:25,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:48:25,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:48:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:25,347 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) [2021-11-19 15:48:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:25,521 INFO L93 Difference]: Finished difference Result 1115 states and 1820 transitions. [2021-11-19 15:48:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:25,523 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 [2021-11-19 15:48:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:25,529 INFO L225 Difference]: With dead ends: 1115 [2021-11-19 15:48:25,529 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 15:48:25,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:48:25,535 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 131 mSDsluCounter, 4308 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5201 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:25,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5201 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 15:48:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 555. [2021-11-19 15:48:25,558 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) [2021-11-19 15:48:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 897 transitions. [2021-11-19 15:48:25,563 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 897 transitions. Word has length 111 [2021-11-19 15:48:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:25,564 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 897 transitions. [2021-11-19 15:48:25,564 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) [2021-11-19 15:48:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 897 transitions. [2021-11-19 15:48:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 15:48:25,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:25,569 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] [2021-11-19 15:48:25,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:25,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:25,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1433254134, now seen corresponding path program 1 times [2021-11-19 15:48:25,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:25,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541699121] [2021-11-19 15:48:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:25,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:25,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:25,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:48:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:26,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:48:26,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:26,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541699121] [2021-11-19 15:48:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541699121] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:26,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:26,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823606316] [2021-11-19 15:48:26,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:26,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:26,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:26,844 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) [2021-11-19 15:48:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:26,989 INFO L93 Difference]: Finished difference Result 1079 states and 1758 transitions. [2021-11-19 15:48:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:26,991 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 [2021-11-19 15:48:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:26,996 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 15:48:26,997 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 15:48:27,001 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 [2021-11-19 15:48:27,002 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 69 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:27,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2498 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 15:48:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 15:48:27,026 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) [2021-11-19 15:48:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 896 transitions. [2021-11-19 15:48:27,032 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 896 transitions. Word has length 112 [2021-11-19 15:48:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:27,032 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 896 transitions. [2021-11-19 15:48:27,033 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) [2021-11-19 15:48:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 896 transitions. [2021-11-19 15:48:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:48:27,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:27,038 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] [2021-11-19 15:48:27,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:27,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:27,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1373343697, now seen corresponding path program 1 times [2021-11-19 15:48:27,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:27,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114728992] [2021-11-19 15:48:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:27,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:27,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:27,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:48:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:28,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:48:28,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114728992] [2021-11-19 15:48:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114728992] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:28,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:28,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:48:28,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358243175] [2021-11-19 15:48:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:28,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:48:28,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:48:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:28,357 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) [2021-11-19 15:48:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:28,492 INFO L93 Difference]: Finished difference Result 1079 states and 1757 transitions. [2021-11-19 15:48:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:28,494 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 [2021-11-19 15:48:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:28,500 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 15:48:28,500 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 15:48:28,504 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 [2021-11-19 15:48:28,505 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 67 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:28,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2498 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 15:48:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 15:48:28,528 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) [2021-11-19 15:48:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 895 transitions. [2021-11-19 15:48:28,533 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 895 transitions. Word has length 113 [2021-11-19 15:48:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:28,533 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 895 transitions. [2021-11-19 15:48:28,534 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) [2021-11-19 15:48:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 895 transitions. [2021-11-19 15:48:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 15:48:28,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:28,539 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] [2021-11-19 15:48:28,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:28,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:28,756 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2066463867, now seen corresponding path program 1 times [2021-11-19 15:48:28,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:28,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116060438] [2021-11-19 15:48:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:28,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:28,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:28,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:48:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:48:29,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:29,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:30,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:30,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116060438] [2021-11-19 15:48:30,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116060438] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:30,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:30,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 15:48:30,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570682801] [2021-11-19 15:48:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:30,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:30,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:30,072 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) [2021-11-19 15:48:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:30,361 INFO L93 Difference]: Finished difference Result 1084 states and 1764 transitions. [2021-11-19 15:48:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:30,363 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 [2021-11-19 15:48:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:30,369 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 15:48:30,370 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 15:48:30,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:48:30,374 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 109 mSDsluCounter, 4958 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5795 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:30,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5795 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 15:48:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2021-11-19 15:48:30,397 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) [2021-11-19 15:48:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 896 transitions. [2021-11-19 15:48:30,402 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 896 transitions. Word has length 114 [2021-11-19 15:48:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:30,402 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 896 transitions. [2021-11-19 15:48:30,403 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) [2021-11-19 15:48:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 896 transitions. [2021-11-19 15:48:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 15:48:30,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:30,408 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] [2021-11-19 15:48:30,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:30,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:30,630 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1696614406, now seen corresponding path program 1 times [2021-11-19 15:48:30,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:30,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938493364] [2021-11-19 15:48:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:30,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:30,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:30,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:48:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:31,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:31,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:31,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:31,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938493364] [2021-11-19 15:48:31,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938493364] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 15:48:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717446210] [2021-11-19 15:48:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:31,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:31,842 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) [2021-11-19 15:48:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:32,142 INFO L93 Difference]: Finished difference Result 1076 states and 1745 transitions. [2021-11-19 15:48:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:32,144 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 [2021-11-19 15:48:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:32,151 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 15:48:32,151 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 15:48:32,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:48:32,156 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 77 mSDsluCounter, 4964 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5803 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:32,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5803 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 15:48:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2021-11-19 15:48:32,187 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) [2021-11-19 15:48:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 897 transitions. [2021-11-19 15:48:32,193 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 897 transitions. Word has length 115 [2021-11-19 15:48:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:32,194 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 897 transitions. [2021-11-19 15:48:32,194 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) [2021-11-19 15:48:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 897 transitions. [2021-11-19 15:48:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 15:48:32,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:32,200 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] [2021-11-19 15:48:32,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:32,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:32,416 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:32,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1430721647, now seen corresponding path program 1 times [2021-11-19 15:48:32,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:32,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085036370] [2021-11-19 15:48:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:32,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:32,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:32,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:48:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:33,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:33,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:33,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085036370] [2021-11-19 15:48:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085036370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:33,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:33,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:48:33,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19719748] [2021-11-19 15:48:33,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:48:33,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:48:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:33,447 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) [2021-11-19 15:48:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:33,686 INFO L93 Difference]: Finished difference Result 1022 states and 1672 transitions. [2021-11-19 15:48:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:33,688 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 [2021-11-19 15:48:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:33,694 INFO L225 Difference]: With dead ends: 1022 [2021-11-19 15:48:33,695 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 15:48:33,698 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 [2021-11-19 15:48:33,700 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 56 mSDsluCounter, 5836 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6687 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:33,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6687 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 15:48:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 15:48:33,723 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) [2021-11-19 15:48:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 889 transitions. [2021-11-19 15:48:33,729 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 889 transitions. Word has length 116 [2021-11-19 15:48:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:33,729 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 889 transitions. [2021-11-19 15:48:33,730 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) [2021-11-19 15:48:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 889 transitions. [2021-11-19 15:48:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 15:48:33,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:33,735 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] [2021-11-19 15:48:33,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:33,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:33,957 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1470782170, now seen corresponding path program 1 times [2021-11-19 15:48:33,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:33,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326079233] [2021-11-19 15:48:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:33,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:33,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:33,960 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:34,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:48:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:34,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:35,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:35,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326079233] [2021-11-19 15:48:35,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326079233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:35,245 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:35,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:48:35,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961829399] [2021-11-19 15:48:35,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:48:35,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:48:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:48:35,248 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) [2021-11-19 15:48:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:35,432 INFO L93 Difference]: Finished difference Result 1027 states and 1686 transitions. [2021-11-19 15:48:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:35,434 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 [2021-11-19 15:48:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:35,440 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 15:48:35,440 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 15:48:35,443 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 [2021-11-19 15:48:35,444 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 170 mSDsluCounter, 4197 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:35,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5040 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 15:48:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 15:48:35,466 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) [2021-11-19 15:48:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 884 transitions. [2021-11-19 15:48:35,470 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 884 transitions. Word has length 117 [2021-11-19 15:48:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:35,471 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 884 transitions. [2021-11-19 15:48:35,471 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) [2021-11-19 15:48:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 884 transitions. [2021-11-19 15:48:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 15:48:35,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:35,476 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] [2021-11-19 15:48:35,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:35,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:35,694 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:35,694 INFO L85 PathProgramCache]: Analyzing trace with hash -132578906, now seen corresponding path program 1 times [2021-11-19 15:48:35,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:35,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4198711] [2021-11-19 15:48:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:35,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:35,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:48:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:36,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:36,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:36,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4198711] [2021-11-19 15:48:36,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4198711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:36,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:36,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:48:36,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062861794] [2021-11-19 15:48:36,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:36,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:36,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:36,844 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) [2021-11-19 15:48:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:37,032 INFO L93 Difference]: Finished difference Result 1024 states and 1681 transitions. [2021-11-19 15:48:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:37,034 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 [2021-11-19 15:48:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:37,039 INFO L225 Difference]: With dead ends: 1024 [2021-11-19 15:48:37,040 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 15:48:37,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:48:37,044 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 105 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5789 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:37,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5789 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 15:48:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 15:48:37,066 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) [2021-11-19 15:48:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 873 transitions. [2021-11-19 15:48:37,070 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 873 transitions. Word has length 117 [2021-11-19 15:48:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:37,070 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 873 transitions. [2021-11-19 15:48:37,071 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) [2021-11-19 15:48:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 873 transitions. [2021-11-19 15:48:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 15:48:37,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:37,076 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] [2021-11-19 15:48:37,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:37,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:37,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash 279574131, now seen corresponding path program 1 times [2021-11-19 15:48:37,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:37,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877314472] [2021-11-19 15:48:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:37,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:37,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:48:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:48:37,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:37,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:38,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:38,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877314472] [2021-11-19 15:48:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877314472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:38,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:38,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:48:38,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225660585] [2021-11-19 15:48:38,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:38,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:48:38,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:48:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:38,484 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) [2021-11-19 15:48:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:38,823 INFO L93 Difference]: Finished difference Result 1010 states and 1659 transitions. [2021-11-19 15:48:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:38,825 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 [2021-11-19 15:48:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:38,830 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 15:48:38,831 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 15:48:38,833 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 [2021-11-19 15:48:38,835 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 100 mSDsluCounter, 6623 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7461 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:38,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 7461 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 15:48:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 15:48:38,862 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) [2021-11-19 15:48:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 872 transitions. [2021-11-19 15:48:38,866 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 872 transitions. Word has length 118 [2021-11-19 15:48:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:38,866 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 872 transitions. [2021-11-19 15:48:38,867 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) [2021-11-19 15:48:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 872 transitions. [2021-11-19 15:48:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:48:38,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:38,872 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] [2021-11-19 15:48:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:39,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:39,088 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1638177084, now seen corresponding path program 1 times [2021-11-19 15:48:39,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:39,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670517015] [2021-11-19 15:48:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:39,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:39,091 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:48:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:39,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:48:39,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:39,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:40,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:40,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670517015] [2021-11-19 15:48:40,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670517015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:40,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:40,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:48:40,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536301250] [2021-11-19 15:48:40,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:48:40,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:48:40,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:40,545 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) [2021-11-19 15:48:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:40,793 INFO L93 Difference]: Finished difference Result 1054 states and 1716 transitions. [2021-11-19 15:48:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:40,795 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 [2021-11-19 15:48:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:40,805 INFO L225 Difference]: With dead ends: 1054 [2021-11-19 15:48:40,806 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 15:48:40,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:48:40,810 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 191 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 4922 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:40,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 4922 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 15:48:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 15:48:40,836 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) [2021-11-19 15:48:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 864 transitions. [2021-11-19 15:48:40,841 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 864 transitions. Word has length 119 [2021-11-19 15:48:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 864 transitions. [2021-11-19 15:48:40,842 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) [2021-11-19 15:48:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 864 transitions. [2021-11-19 15:48:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:48:40,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:40,847 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] [2021-11-19 15:48:40,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:41,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:41,068 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2101596776, now seen corresponding path program 1 times [2021-11-19 15:48:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:41,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225693755] [2021-11-19 15:48:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:41,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:41,072 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:41,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:48:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:41,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:42,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:42,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225693755] [2021-11-19 15:48:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225693755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:42,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:42,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:48:42,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421366521] [2021-11-19 15:48:42,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:42,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:48:42,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:42,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:48:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:42,230 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) [2021-11-19 15:48:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:42,497 INFO L93 Difference]: Finished difference Result 1001 states and 1639 transitions. [2021-11-19 15:48:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:42,500 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 [2021-11-19 15:48:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:42,505 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 15:48:42,505 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 15:48:42,509 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 [2021-11-19 15:48:42,510 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 99 mSDsluCounter, 6583 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 7410 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:42,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 7410 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 15:48:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 15:48:42,532 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) [2021-11-19 15:48:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 863 transitions. [2021-11-19 15:48:42,537 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 863 transitions. Word has length 120 [2021-11-19 15:48:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:42,538 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 863 transitions. [2021-11-19 15:48:42,539 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) [2021-11-19 15:48:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 863 transitions. [2021-11-19 15:48:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 15:48:42,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:42,544 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] [2021-11-19 15:48:42,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:42,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:42,757 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 419160757, now seen corresponding path program 1 times [2021-11-19 15:48:42,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:42,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795674116] [2021-11-19 15:48:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:42,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:42,760 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:42,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:48:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:43,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:48:44,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:44,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795674116] [2021-11-19 15:48:44,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795674116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:44,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:44,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:48:44,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070859663] [2021-11-19 15:48:44,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:44,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:48:44,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:48:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:44,020 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) [2021-11-19 15:48:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:44,307 INFO L93 Difference]: Finished difference Result 1039 states and 1684 transitions. [2021-11-19 15:48:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:44,309 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 [2021-11-19 15:48:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:44,314 INFO L225 Difference]: With dead ends: 1039 [2021-11-19 15:48:44,315 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 15:48:44,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:48:44,319 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 106 mSDsluCounter, 6544 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7369 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:44,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 7369 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 15:48:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 15:48:44,340 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) [2021-11-19 15:48:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 855 transitions. [2021-11-19 15:48:44,345 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 855 transitions. Word has length 121 [2021-11-19 15:48:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:44,345 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 855 transitions. [2021-11-19 15:48:44,346 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) [2021-11-19 15:48:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 855 transitions. [2021-11-19 15:48:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 15:48:44,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:44,351 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] [2021-11-19 15:48:44,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:44,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:44,565 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 425229181, now seen corresponding path program 1 times [2021-11-19 15:48:44,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:44,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691223350] [2021-11-19 15:48:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:44,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:44,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:44,568 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:44,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:48:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:48:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:46,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:46,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691223350] [2021-11-19 15:48:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691223350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:46,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:46,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 15:48:46,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906878267] [2021-11-19 15:48:46,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:46,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:48:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:48:46,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:48:46,464 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) [2021-11-19 15:48:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:51,087 INFO L93 Difference]: Finished difference Result 1127 states and 1874 transitions. [2021-11-19 15:48:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:51,088 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 [2021-11-19 15:48:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:51,092 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 15:48:51,092 INFO L226 Difference]: Without dead ends: 672 [2021-11-19 15:48:51,094 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 [2021-11-19 15:48:51,095 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 1563 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:51,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1563 Valid, 3436 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 15:48:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-19 15:48:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 539. [2021-11-19 15:48:51,126 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) [2021-11-19 15:48:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 874 transitions. [2021-11-19 15:48:51,130 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 874 transitions. Word has length 122 [2021-11-19 15:48:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:51,131 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 874 transitions. [2021-11-19 15:48:51,131 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) [2021-11-19 15:48:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 874 transitions. [2021-11-19 15:48:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 15:48:51,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:51,136 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] [2021-11-19 15:48:51,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:51,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:51,357 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash -237702470, now seen corresponding path program 1 times [2021-11-19 15:48:51,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:51,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184018686] [2021-11-19 15:48:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:51,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:51,360 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:51,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:48:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:51,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:48:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:52,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:52,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:52,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184018686] [2021-11-19 15:48:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184018686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:52,581 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:48:52,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867626416] [2021-11-19 15:48:52,582 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:52,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:48:52,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:48:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:48:52,584 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) [2021-11-19 15:48:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:58,390 INFO L93 Difference]: Finished difference Result 1873 states and 3195 transitions. [2021-11-19 15:48:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:48:58,398 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 [2021-11-19 15:48:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:58,412 INFO L225 Difference]: With dead ends: 1873 [2021-11-19 15:48:58,412 INFO L226 Difference]: Without dead ends: 1414 [2021-11-19 15:48:58,417 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 [2021-11-19 15:48:58,418 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 4487 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4562 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:58,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4562 Valid, 2980 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 15:48:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-11-19 15:48:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1326. [2021-11-19 15:48:58,546 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) [2021-11-19 15:48:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2184 transitions. [2021-11-19 15:48:58,562 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2184 transitions. Word has length 123 [2021-11-19 15:48:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 2184 transitions. [2021-11-19 15:48:58,564 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) [2021-11-19 15:48:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2184 transitions. [2021-11-19 15:48:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:48:58,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:58,568 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] [2021-11-19 15:48:58,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:58,788 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1639966538, now seen corresponding path program 1 times [2021-11-19 15:48:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:58,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825706193] [2021-11-19 15:48:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:58,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:58,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:58,791 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:58,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:48:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:48:59,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:00,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:00,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825706193] [2021-11-19 15:49:00,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825706193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:00,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:00,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 15:49:00,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499609871] [2021-11-19 15:49:00,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:00,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:49:00,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:49:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:49:00,104 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) [2021-11-19 15:49:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:08,970 INFO L93 Difference]: Finished difference Result 6676 states and 11578 transitions. [2021-11-19 15:49:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:49:08,971 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 [2021-11-19 15:49:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:09,015 INFO L225 Difference]: With dead ends: 6676 [2021-11-19 15:49:09,015 INFO L226 Difference]: Without dead ends: 5430 [2021-11-19 15:49:09,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:49:09,027 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 5636 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 2655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5733 SdHoareTripleChecker+Valid, 4312 SdHoareTripleChecker+Invalid, 8742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2655 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:09,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5733 Valid, 4312 Invalid, 8742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2655 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-19 15:49:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-11-19 15:49:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3111. [2021-11-19 15:49:09,349 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) [2021-11-19 15:49:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5242 transitions. [2021-11-19 15:49:09,371 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5242 transitions. Word has length 125 [2021-11-19 15:49:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:09,371 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5242 transitions. [2021-11-19 15:49:09,372 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) [2021-11-19 15:49:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5242 transitions. [2021-11-19 15:49:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:49:09,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:09,375 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] [2021-11-19 15:49:09,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:09,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:09,595 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash -205400628, now seen corresponding path program 1 times [2021-11-19 15:49:09,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:09,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533673646] [2021-11-19 15:49:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:09,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:09,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:09,597 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 15:49:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:49:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:10,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:10,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533673646] [2021-11-19 15:49:10,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533673646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:10,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:10,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:49:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107307546] [2021-11-19 15:49:10,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:10,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:49:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:49:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:49:10,841 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) [2021-11-19 15:49:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:15,872 INFO L93 Difference]: Finished difference Result 8317 states and 14190 transitions. [2021-11-19 15:49:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:49:15,873 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 [2021-11-19 15:49:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:15,916 INFO L225 Difference]: With dead ends: 8317 [2021-11-19 15:49:15,916 INFO L226 Difference]: Without dead ends: 6109 [2021-11-19 15:49:15,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:49:15,930 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 4068 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 4601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:15,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 2644 Invalid, 4601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 15:49:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-11-19 15:49:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5718. [2021-11-19 15:49:16,451 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) [2021-11-19 15:49:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 9702 transitions. [2021-11-19 15:49:16,497 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 9702 transitions. Word has length 125 [2021-11-19 15:49:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 5718 states and 9702 transitions. [2021-11-19 15:49:16,498 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) [2021-11-19 15:49:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 9702 transitions. [2021-11-19 15:49:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 15:49:16,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:16,503 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] [2021-11-19 15:49:16,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:16,720 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -782228256, now seen corresponding path program 1 times [2021-11-19 15:49:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:16,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269405628] [2021-11-19 15:49:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:16,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:16,722 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 15:49:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:49:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:17,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:18,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:18,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269405628] [2021-11-19 15:49:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269405628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:18,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:18,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 15:49:18,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143730977] [2021-11-19 15:49:18,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:18,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:49:18,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:49:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:49:18,568 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) [2021-11-19 15:49:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:26,363 INFO L93 Difference]: Finished difference Result 15381 states and 26216 transitions. [2021-11-19 15:49:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:49:26,365 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 [2021-11-19 15:49:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:26,449 INFO L225 Difference]: With dead ends: 15381 [2021-11-19 15:49:26,449 INFO L226 Difference]: Without dead ends: 10466 [2021-11-19 15:49:26,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:49:26,477 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 3689 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 6709 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3763 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 7685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 6709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:26,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3763 Valid, 3764 Invalid, 7685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 6709 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 15:49:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2021-11-19 15:49:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 10172. [2021-11-19 15:49:27,439 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) [2021-11-19 15:49:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 17202 transitions. [2021-11-19 15:49:27,529 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 17202 transitions. Word has length 130 [2021-11-19 15:49:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:27,530 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 17202 transitions. [2021-11-19 15:49:27,531 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) [2021-11-19 15:49:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 17202 transitions. [2021-11-19 15:49:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:49:27,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:27,536 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] [2021-11-19 15:49:27,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:27,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:27,752 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash 8992208, now seen corresponding path program 1 times [2021-11-19 15:49:27,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:27,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513586132] [2021-11-19 15:49:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:27,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:27,755 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:27,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 15:49:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:49:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:28,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:28,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:28,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513586132] [2021-11-19 15:49:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513586132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:28,897 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:28,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:49:28,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781941154] [2021-11-19 15:49:28,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:28,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:49:28,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:49:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:49:28,900 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) [2021-11-19 15:49:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:29,747 INFO L93 Difference]: Finished difference Result 20073 states and 34216 transitions. [2021-11-19 15:49:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:49:29,748 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 [2021-11-19 15:49:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:29,835 INFO L225 Difference]: With dead ends: 20073 [2021-11-19 15:49:29,835 INFO L226 Difference]: Without dead ends: 10172 [2021-11-19 15:49:29,884 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 [2021-11-19 15:49:29,885 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 234 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:29,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3174 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:49:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-11-19 15:49:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 10172. [2021-11-19 15:49:30,727 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) [2021-11-19 15:49:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 17078 transitions. [2021-11-19 15:49:30,842 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 17078 transitions. Word has length 137 [2021-11-19 15:49:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:30,843 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 17078 transitions. [2021-11-19 15:49:30,843 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) [2021-11-19 15:49:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 17078 transitions. [2021-11-19 15:49:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 15:49:30,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:30,851 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] [2021-11-19 15:49:30,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:31,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:31,068 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash 678755259, now seen corresponding path program 1 times [2021-11-19 15:49:31,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:31,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740382730] [2021-11-19 15:49:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:31,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:31,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:31,074 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:31,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:49:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:49:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:49:32,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:49:32,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:32,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740382730] [2021-11-19 15:49:32,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740382730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:32,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:32,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 15:49:32,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427739494] [2021-11-19 15:49:32,783 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:32,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:49:32,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:49:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:49:32,784 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) [2021-11-19 15:49:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:37,256 INFO L93 Difference]: Finished difference Result 20203 states and 33992 transitions. [2021-11-19 15:49:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:49:37,258 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 [2021-11-19 15:49:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:37,340 INFO L225 Difference]: With dead ends: 20203 [2021-11-19 15:49:37,341 INFO L226 Difference]: Without dead ends: 11047 [2021-11-19 15:49:37,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:49:37,379 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 4101 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:37,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4177 Valid, 2116 Invalid, 3921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 2862 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 15:49:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2021-11-19 15:49:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 10532. [2021-11-19 15:49:38,263 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) [2021-11-19 15:49:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 17566 transitions. [2021-11-19 15:49:38,358 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 17566 transitions. Word has length 142 [2021-11-19 15:49:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 17566 transitions. [2021-11-19 15:49:38,359 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) [2021-11-19 15:49:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 17566 transitions. [2021-11-19 15:49:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 15:49:38,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:38,365 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] [2021-11-19 15:49:38,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:38,592 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1158368213, now seen corresponding path program 1 times [2021-11-19 15:49:38,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:38,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993997998] [2021-11-19 15:49:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:38,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:38,595 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:38,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 15:49:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:49:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 15:49:39,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 15:49:40,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:40,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993997998] [2021-11-19 15:49:40,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993997998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:40,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:40,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:49:40,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588193812] [2021-11-19 15:49:40,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:40,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:49:40,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:49:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:49:40,929 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) [2021-11-19 15:49:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:49,819 INFO L93 Difference]: Finished difference Result 28180 states and 47430 transitions. [2021-11-19 15:49:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:49:49,821 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 [2021-11-19 15:49:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:49,982 INFO L225 Difference]: With dead ends: 28180 [2021-11-19 15:49:49,983 INFO L226 Difference]: Without dead ends: 18661 [2021-11-19 15:49:50,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:49:50,025 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3201 mSDsluCounter, 2707 mSDsCounter, 0 mSdLazyCounter, 6531 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 7385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 6531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:50,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3272 Valid, 3581 Invalid, 7385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 6531 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 15:49:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18661 states. [2021-11-19 15:49:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18661 to 18587. [2021-11-19 15:49:51,176 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) [2021-11-19 15:49:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18587 states to 18587 states and 31152 transitions. [2021-11-19 15:49:51,473 INFO L78 Accepts]: Start accepts. Automaton has 18587 states and 31152 transitions. Word has length 147 [2021-11-19 15:49:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:51,474 INFO L470 AbstractCegarLoop]: Abstraction has 18587 states and 31152 transitions. [2021-11-19 15:49:51,474 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) [2021-11-19 15:49:51,474 INFO L276 IsEmpty]: Start isEmpty. Operand 18587 states and 31152 transitions. [2021-11-19 15:49:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 15:49:51,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:51,478 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] [2021-11-19 15:49:51,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:51,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:51,700 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1292381719, now seen corresponding path program 1 times [2021-11-19 15:49:51,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:51,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852573978] [2021-11-19 15:49:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:51,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:51,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:51,702 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:51,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 15:49:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:49:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:49:52,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:49:53,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:53,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852573978] [2021-11-19 15:49:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852573978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:53,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:53,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:49:53,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735773607] [2021-11-19 15:49:53,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:53,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:49:53,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:49:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:49:53,442 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) [2021-11-19 15:50:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:00,617 INFO L93 Difference]: Finished difference Result 47302 states and 80167 transitions. [2021-11-19 15:50:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:50:00,619 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 [2021-11-19 15:50:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:00,837 INFO L225 Difference]: With dead ends: 47302 [2021-11-19 15:50:00,837 INFO L226 Difference]: Without dead ends: 28201 [2021-11-19 15:50:00,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:00,948 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 3011 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 5145 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 5956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 5145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:00,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3105 Valid, 3154 Invalid, 5956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 5145 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 15:50:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28201 states. [2021-11-19 15:50:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28201 to 26909. [2021-11-19 15:50:02,824 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) [2021-11-19 15:50:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26909 states to 26909 states and 45122 transitions. [2021-11-19 15:50:03,007 INFO L78 Accepts]: Start accepts. Automaton has 26909 states and 45122 transitions. Word has length 147 [2021-11-19 15:50:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:03,008 INFO L470 AbstractCegarLoop]: Abstraction has 26909 states and 45122 transitions. [2021-11-19 15:50:03,008 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) [2021-11-19 15:50:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26909 states and 45122 transitions. [2021-11-19 15:50:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 15:50:03,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:03,013 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] [2021-11-19 15:50:03,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-19 15:50:03,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:03,227 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1304047454, now seen corresponding path program 1 times [2021-11-19 15:50:03,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:03,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606391221] [2021-11-19 15:50:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:03,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:03,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:03,229 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:03,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 15:50:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:50:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:03,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:04,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:04,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606391221] [2021-11-19 15:50:04,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606391221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:04,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223827961] [2021-11-19 15:50:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:04,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:04,455 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:04,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 15:50:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:50:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:05,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:05,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223827961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:05,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063800038] [2021-11-19 15:50:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:05,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:50:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:05,809 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:50:05,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 15:50:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:50:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:06,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063800038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:06,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:50:06,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-19 15:50:06,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93022769] [2021-11-19 15:50:06,950 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:50:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:50:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:50:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:06,952 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) [2021-11-19 15:50:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:16,244 INFO L93 Difference]: Finished difference Result 108222 states and 182734 transitions. [2021-11-19 15:50:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 15:50:16,245 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 [2021-11-19 15:50:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:16,924 INFO L225 Difference]: With dead ends: 108222 [2021-11-19 15:50:16,924 INFO L226 Difference]: Without dead ends: 81391 [2021-11-19 15:50:17,056 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 [2021-11-19 15:50:17,057 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 2309 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 4491 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 5127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 4491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:17,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2387 Valid, 2641 Invalid, 5127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 4491 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 15:50:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81391 states. [2021-11-19 15:50:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81391 to 80993. [2021-11-19 15:50:23,152 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) [2021-11-19 15:50:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80993 states to 80993 states and 136321 transitions. [2021-11-19 15:50:23,993 INFO L78 Accepts]: Start accepts. Automaton has 80993 states and 136321 transitions. Word has length 148 [2021-11-19 15:50:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:23,993 INFO L470 AbstractCegarLoop]: Abstraction has 80993 states and 136321 transitions. [2021-11-19 15:50:23,993 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) [2021-11-19 15:50:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 80993 states and 136321 transitions. [2021-11-19 15:50:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 15:50:23,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:23,996 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] [2021-11-19 15:50:24,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:24,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:24,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-19 15:50:24,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:50:24,597 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:24,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1733510827, now seen corresponding path program 1 times [2021-11-19 15:50:24,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:24,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40658876] [2021-11-19 15:50:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:24,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:24,601 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_998e8591-5820-49f2-ad24-da00da435bb8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 15:50:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:50:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:50:25,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:25,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40658876] [2021-11-19 15:50:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40658876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:25,567 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:25,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 15:50:25,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462989437] [2021-11-19 15:50:25,567 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:25,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:50:25,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:50:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:50:25,568 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) [2021-11-19 15:50:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:35,394 INFO L93 Difference]: Finished difference Result 187865 states and 316303 transitions. [2021-11-19 15:50:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:50:35,395 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 [2021-11-19 15:50:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:36,380 INFO L225 Difference]: With dead ends: 187865 [2021-11-19 15:50:36,381 INFO L226 Difference]: Without dead ends: 109786 [2021-11-19 15:50:36,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:36,957 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 463 mSDsluCounter, 4277 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 5292 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:36,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 5292 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:50:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109786 states.