./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:41:00,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:41:00,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:41:00,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:41:00,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:41:00,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:41:00,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:41:00,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:41:00,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:41:00,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:41:00,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:41:00,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:41:00,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:41:00,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:41:00,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:41:00,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:41:00,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:41:00,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:41:00,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:41:00,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:41:00,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:41:00,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:41:00,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:41:00,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:41:00,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:41:00,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:41:00,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:41:00,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:41:00,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:41:00,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:41:00,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:41:00,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:41:00,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:41:00,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:41:00,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:41:00,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:41:00,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:41:00,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:41:00,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:41:00,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:41:00,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:41:00,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:41:00,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:41:00,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:41:00,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:41:00,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:41:00,603 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:41:00,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:41:00,604 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:41:00,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:41:00,610 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:41:00,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:41:00,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:41:00,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:41:00,611 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:41:00,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:41:00,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:41:00,612 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:41:00,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:41:00,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:41:00,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:41:00,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:41:00,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:41:00,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:41:00,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:41:00,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:41:00,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:41:00,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:41:00,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:41:00,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:41:00,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:41:00,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:41:00,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:41:00,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:00,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:41:00,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:41:00,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:41:00,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:41:00,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:41:00,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:41:00,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:41:00,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:41:00,617 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_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-13 01:41:00,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:41:00,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:41:00,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:41:00,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:41:00,914 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:41:00,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-13 01:41:00,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/017baa070/3af6524c38574c6bb4fe015dfc943b50/FLAG44cd5ac1d [2021-11-13 01:41:01,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:41:01,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-13 01:41:01,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/017baa070/3af6524c38574c6bb4fe015dfc943b50/FLAG44cd5ac1d [2021-11-13 01:41:01,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/017baa070/3af6524c38574c6bb4fe015dfc943b50 [2021-11-13 01:41:01,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:41:01,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:41:01,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:01,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:41:01,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:41:01,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:01" (1/1) ... [2021-11-13 01:41:01,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715b0b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:01, skipping insertion in model container [2021-11-13 01:41:01,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:01" (1/1) ... [2021-11-13 01:41:01,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:41:02,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:02,220 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-13 01:41:02,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:02,648 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:41:02,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14b41be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:02, skipping insertion in model container [2021-11-13 01:41:02,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:02,650 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:41:02,652 INFO L158 Benchmark]: Toolchain (without parser) took 677.29ms. Allocated memory is still 98.6MB. Free memory was 64.1MB in the beginning and 74.3MB in the end (delta: -10.2MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-11-13 01:41:02,653 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 46.2MB in the beginning and 46.2MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:41:02,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 670.62ms. Allocated memory is still 98.6MB. Free memory was 63.9MB in the beginning and 74.3MB in the end (delta: -10.3MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-11-13 01:41:02,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 46.2MB in the beginning and 46.2MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 670.62ms. Allocated memory is still 98.6MB. Free memory was 63.9MB in the beginning and 74.3MB in the end (delta: -10.3MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: 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_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:41:05,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:41:05,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:41:05,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:41:05,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:41:05,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:41:05,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:41:05,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:41:05,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:41:05,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:41:05,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:41:05,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:41:05,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:41:05,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:41:05,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:41:05,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:41:05,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:41:05,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:41:05,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:41:05,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:41:05,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:41:05,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:41:05,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:41:05,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:41:05,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:41:05,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:41:05,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:41:05,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:41:05,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:41:05,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:41:05,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:41:05,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:41:05,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:41:05,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:41:05,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:41:05,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:41:05,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:41:05,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:41:05,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:41:05,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:41:05,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:41:05,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:41:05,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:41:05,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:41:05,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:41:05,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:41:05,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:41:05,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:41:05,238 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:41:05,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:41:05,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:41:05,239 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:41:05,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:41:05,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:41:05,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:41:05,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:41:05,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:41:05,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:41:05,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:41:05,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:41:05,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:41:05,244 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:41:05,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:41:05,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:41:05,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:41:05,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:41:05,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:41:05,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:41:05,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:41:05,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:05,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:41:05,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:41:05,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:41:05,246 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:41:05,247 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:05,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:41:05,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:41:05,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:41:05,248 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_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-13 01:41:05,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:41:05,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:41:05,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:41:05,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:41:05,732 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:41:05,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-13 01:41:05,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/c73e24994/936dc9e752034fbf9e0d55dd39793424/FLAG3d9192079 [2021-11-13 01:41:06,570 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:41:06,571 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-13 01:41:06,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/c73e24994/936dc9e752034fbf9e0d55dd39793424/FLAG3d9192079 [2021-11-13 01:41:06,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/data/c73e24994/936dc9e752034fbf9e0d55dd39793424 [2021-11-13 01:41:06,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:41:06,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:41:06,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:06,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:41:06,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:41:06,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:06" (1/1) ... [2021-11-13 01:41:06,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778123aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:06, skipping insertion in model container [2021-11-13 01:41:06,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:06" (1/1) ... [2021-11-13 01:41:06,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:41:06,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:07,040 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-13 01:41:07,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:07,468 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:41:07,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:07,509 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-13 01:41:07,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:07,703 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:41:07,716 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-13 01:41:07,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:07,893 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:41:07,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07 WrapperNode [2021-11-13 01:41:07,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:07,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:07,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:41:07,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:41:07,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:07,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:08,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:41:08,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:41:08,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:41:08,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:41:08,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:41:08,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:41:08,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:41:08,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (1/1) ... [2021-11-13 01:41:08,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:08,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:41:08,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:41:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 01:41:08,255 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 01:41:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 01:41:08,256 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 01:41:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:41:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 01:41:08,256 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 01:41:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 01:41:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 01:41:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 01:41:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 01:41:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 01:41:08,257 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 01:41:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 01:41:08,258 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 01:41:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 01:41:08,263 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 01:41:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 01:41:08,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 01:41:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 01:41:08,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 01:41:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 01:41:08,264 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 01:41:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 01:41:08,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 01:41:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:41:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 01:41:08,265 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 01:41:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 01:41:08,266 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 01:41:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 01:41:08,266 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 01:41:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 01:41:08,267 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 01:41:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 01:41:08,267 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 01:41:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 01:41:08,268 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 01:41:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 01:41:08,268 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 01:41:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 01:41:08,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 01:41:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:41:08,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:41:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 01:41:08,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 01:41:12,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:41:12,285 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:41:12,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:12 BoogieIcfgContainer [2021-11-13 01:41:12,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:41:12,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:41:12,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:41:12,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:41:12,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:41:06" (1/3) ... [2021-11-13 01:41:12,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca7fbc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:12, skipping insertion in model container [2021-11-13 01:41:12,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:07" (2/3) ... [2021-11-13 01:41:12,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca7fbc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:12, skipping insertion in model container [2021-11-13 01:41:12,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:12" (3/3) ... [2021-11-13 01:41:12,300 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2021-11-13 01:41:12,306 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:41:12,306 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:41:12,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:41:12,398 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:41:12,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:41:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 533 states, 421 states have (on average 1.7125890736342042) internal successors, (721), 442 states have internal predecessors, (721), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-13 01:41:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 01:41:12,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:12,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:12,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 702310628, now seen corresponding path program 1 times [2021-11-13 01:41:12,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:12,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646071279] [2021-11-13 01:41:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:12,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:12,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:12,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:41:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:41:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:41:13,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:41:13,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:13,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646071279] [2021-11-13 01:41:13,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646071279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:13,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:13,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:41:13,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944719838] [2021-11-13 01:41:13,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:13,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:41:13,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:41:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:41:13,842 INFO L87 Difference]: Start difference. First operand has 533 states, 421 states have (on average 1.7125890736342042) internal successors, (721), 442 states have internal predecessors, (721), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:41:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:13,953 INFO L93 Difference]: Finished difference Result 554 states and 929 transitions. [2021-11-13 01:41:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:41:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-13 01:41:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:13,985 INFO L225 Difference]: With dead ends: 554 [2021-11-13 01:41:13,986 INFO L226 Difference]: Without dead ends: 525 [2021-11-13 01:41:13,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:41:13,995 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:13,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 12.35ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:41:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-13 01:41:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-13 01:41:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7108433734939759) internal successors, (710), 434 states have internal predecessors, (710), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 883 transitions. [2021-11-13 01:41:14,126 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 883 transitions. Word has length 97 [2021-11-13 01:41:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:14,132 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 883 transitions. [2021-11-13 01:41:14,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:41:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 883 transitions. [2021-11-13 01:41:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:41:14,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:14,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:14,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:14,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:14,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash -685415757, now seen corresponding path program 1 times [2021-11-13 01:41:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:14,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772833136] [2021-11-13 01:41:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:14,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:14,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:41:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:15,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:15,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772833136] [2021-11-13 01:41:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772833136] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:15,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:15,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:15,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917622675] [2021-11-13 01:41:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:15,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:15,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:15,652 INFO L87 Difference]: Start difference. First operand 525 states and 883 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:15,823 INFO L93 Difference]: Finished difference Result 1041 states and 1758 transitions. [2021-11-13 01:41:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-13 01:41:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:15,832 INFO L225 Difference]: With dead ends: 1041 [2021-11-13 01:41:15,833 INFO L226 Difference]: Without dead ends: 525 [2021-11-13 01:41:15,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:15,844 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 14 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.97ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:15,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2600 Invalid, 35 Unknown, 0 Unchecked, 17.05ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 50.97ms Time] [2021-11-13 01:41:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-13 01:41:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-13 01:41:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7084337349397591) internal successors, (709), 434 states have internal predecessors, (709), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 882 transitions. [2021-11-13 01:41:15,907 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 882 transitions. Word has length 99 [2021-11-13 01:41:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:15,909 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 882 transitions. [2021-11-13 01:41:15,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 882 transitions. [2021-11-13 01:41:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:41:15,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:15,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:15,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:16,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:16,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1110327915, now seen corresponding path program 1 times [2021-11-13 01:41:16,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:16,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096376545] [2021-11-13 01:41:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:16,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:16,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:16,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:41:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:16,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:17,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:17,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096376545] [2021-11-13 01:41:17,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096376545] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:17,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:17,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:17,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032937295] [2021-11-13 01:41:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:17,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:17,364 INFO L87 Difference]: Start difference. First operand 525 states and 882 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:17,453 INFO L93 Difference]: Finished difference Result 1041 states and 1756 transitions. [2021-11-13 01:41:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-13 01:41:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:17,460 INFO L225 Difference]: With dead ends: 1041 [2021-11-13 01:41:17,460 INFO L226 Difference]: Without dead ends: 525 [2021-11-13 01:41:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:17,468 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 12 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.94ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:17,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2600 Invalid, 33 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 39.94ms Time] [2021-11-13 01:41:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-13 01:41:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-13 01:41:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7060240963855422) internal successors, (708), 434 states have internal predecessors, (708), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 881 transitions. [2021-11-13 01:41:17,510 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 881 transitions. Word has length 101 [2021-11-13 01:41:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:17,511 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 881 transitions. [2021-11-13 01:41:17,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 881 transitions. [2021-11-13 01:41:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 01:41:17,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:17,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:17,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:17,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:17,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1399421363, now seen corresponding path program 1 times [2021-11-13 01:41:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:17,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209410782] [2021-11-13 01:41:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:17,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:17,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:17,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:41:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:18,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:18,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:18,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209410782] [2021-11-13 01:41:18,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209410782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:18,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:18,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:18,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135327273] [2021-11-13 01:41:18,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:18,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:18,889 INFO L87 Difference]: Start difference. First operand 525 states and 881 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:18,981 INFO L93 Difference]: Finished difference Result 1045 states and 1759 transitions. [2021-11-13 01:41:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:41:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-13 01:41:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:18,987 INFO L225 Difference]: With dead ends: 1045 [2021-11-13 01:41:18,987 INFO L226 Difference]: Without dead ends: 531 [2021-11-13 01:41:18,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:18,991 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 13 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.11ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:18,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2600 Invalid, 35 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 41.11ms Time] [2021-11-13 01:41:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-13 01:41:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-13 01:41:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6976190476190476) internal successors, (713), 439 states have internal predecessors, (713), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2021-11-13 01:41:19,021 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 103 [2021-11-13 01:41:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:19,021 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2021-11-13 01:41:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2021-11-13 01:41:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 01:41:19,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:19,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:19,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:19,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1663492228, now seen corresponding path program 1 times [2021-11-13 01:41:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:19,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473354187] [2021-11-13 01:41:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:19,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:19,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:41:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:20,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:20,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473354187] [2021-11-13 01:41:20,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473354187] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:20,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:20,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:20,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619582342] [2021-11-13 01:41:20,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:20,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:20,473 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:20,582 INFO L93 Difference]: Finished difference Result 1044 states and 1750 transitions. [2021-11-13 01:41:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-13 01:41:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:20,589 INFO L225 Difference]: With dead ends: 1044 [2021-11-13 01:41:20,589 INFO L226 Difference]: Without dead ends: 531 [2021-11-13 01:41:20,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:20,595 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 8 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.80ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:20,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2601 Invalid, 30 Unknown, 0 Unchecked, 12.25ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 35.80ms Time] [2021-11-13 01:41:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-13 01:41:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-13 01:41:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6952380952380952) internal successors, (712), 439 states have internal predecessors, (712), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 885 transitions. [2021-11-13 01:41:20,630 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 885 transitions. Word has length 104 [2021-11-13 01:41:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:20,630 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 885 transitions. [2021-11-13 01:41:20,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 885 transitions. [2021-11-13 01:41:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 01:41:20,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:20,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:20,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:20,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:20,852 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash 628967127, now seen corresponding path program 1 times [2021-11-13 01:41:20,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:20,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734453320] [2021-11-13 01:41:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:20,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:20,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:41:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:21,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:21,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734453320] [2021-11-13 01:41:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734453320] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:21,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:21,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:21,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757887148] [2021-11-13 01:41:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:21,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:21,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:21,962 INFO L87 Difference]: Start difference. First operand 531 states and 885 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:22,044 INFO L93 Difference]: Finished difference Result 1044 states and 1749 transitions. [2021-11-13 01:41:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-13 01:41:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:22,050 INFO L225 Difference]: With dead ends: 1044 [2021-11-13 01:41:22,050 INFO L226 Difference]: Without dead ends: 531 [2021-11-13 01:41:22,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:22,055 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 6 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:22,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2601 Invalid, 28 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 32.65ms Time] [2021-11-13 01:41:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-13 01:41:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-13 01:41:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6928571428571428) internal successors, (711), 439 states have internal predecessors, (711), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 884 transitions. [2021-11-13 01:41:22,082 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 884 transitions. Word has length 105 [2021-11-13 01:41:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:22,083 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 884 transitions. [2021-11-13 01:41:22,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 884 transitions. [2021-11-13 01:41:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:41:22,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:22,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:22,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:22,310 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1434263264, now seen corresponding path program 1 times [2021-11-13 01:41:22,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:22,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617716991] [2021-11-13 01:41:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:22,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:22,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:22,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:41:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:22,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:23,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:23,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:23,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617716991] [2021-11-13 01:41:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617716991] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:23,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:23,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 01:41:23,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960471766] [2021-11-13 01:41:23,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:23,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:23,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:23,543 INFO L87 Difference]: Start difference. First operand 531 states and 884 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:23,802 INFO L93 Difference]: Finished difference Result 1061 states and 1777 transitions. [2021-11-13 01:41:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-13 01:41:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:23,817 INFO L225 Difference]: With dead ends: 1061 [2021-11-13 01:41:23,817 INFO L226 Difference]: Without dead ends: 552 [2021-11-13 01:41:23,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:41:23,821 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 148 mSDsluCounter, 4233 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5101 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:23,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5101 Invalid, 85 Unknown, 0 Unchecked, 14.62ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 178.38ms Time] [2021-11-13 01:41:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-13 01:41:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2021-11-13 01:41:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 436 states have (on average 1.6903669724770642) internal successors, (737), 457 states have internal predecessors, (737), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-11-13 01:41:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 915 transitions. [2021-11-13 01:41:23,856 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 915 transitions. Word has length 106 [2021-11-13 01:41:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:23,856 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 915 transitions. [2021-11-13 01:41:23,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 915 transitions. [2021-11-13 01:41:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:41:23,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:23,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:23,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:24,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:24,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1048896481, now seen corresponding path program 1 times [2021-11-13 01:41:24,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:24,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330770322] [2021-11-13 01:41:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:24,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:24,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:41:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:41:24,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:41:25,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:25,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330770322] [2021-11-13 01:41:25,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330770322] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:25,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:25,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 01:41:25,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671216564] [2021-11-13 01:41:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:25,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:25,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:41:25,275 INFO L87 Difference]: Start difference. First operand 550 states and 915 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:25,368 INFO L93 Difference]: Finished difference Result 1074 states and 1799 transitions. [2021-11-13 01:41:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:41:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-13 01:41:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:25,374 INFO L225 Difference]: With dead ends: 1074 [2021-11-13 01:41:25,374 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:41:25,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:25,380 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 8 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:25,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2600 Invalid, 30 Unknown, 0 Unchecked, 6.18ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 42.13ms Time] [2021-11-13 01:41:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:41:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:41:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6912442396313363) internal successors, (734), 454 states have internal predecessors, (734), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-13 01:41:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 908 transitions. [2021-11-13 01:41:25,411 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 908 transitions. Word has length 106 [2021-11-13 01:41:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:25,411 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 908 transitions. [2021-11-13 01:41:25,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 908 transitions. [2021-11-13 01:41:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 01:41:25,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:25,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:25,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:25,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:25,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2017589662, now seen corresponding path program 1 times [2021-11-13 01:41:25,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:25,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928217052] [2021-11-13 01:41:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:25,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:25,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:41:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:26,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:41:26,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:26,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928217052] [2021-11-13 01:41:26,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928217052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:26,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:26,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:26,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255572908] [2021-11-13 01:41:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:26,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:26,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:26,709 INFO L87 Difference]: Start difference. First operand 546 states and 908 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:26,932 INFO L93 Difference]: Finished difference Result 1100 states and 1844 transitions. [2021-11-13 01:41:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-13 01:41:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:26,945 INFO L225 Difference]: With dead ends: 1100 [2021-11-13 01:41:26,946 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:41:26,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:26,951 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 134 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.42ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:26,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2408 Invalid, 131 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 171.42ms Time] [2021-11-13 01:41:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:41:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:41:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6797235023041475) internal successors, (729), 454 states have internal predecessors, (729), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-13 01:41:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 903 transitions. [2021-11-13 01:41:26,980 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 903 transitions. Word has length 107 [2021-11-13 01:41:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 903 transitions. [2021-11-13 01:41:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 903 transitions. [2021-11-13 01:41:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 01:41:26,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:26,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:27,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1870807868, now seen corresponding path program 1 times [2021-11-13 01:41:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:27,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042265620] [2021-11-13 01:41:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:27,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:27,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:41:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:27,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:41:28,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:28,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042265620] [2021-11-13 01:41:28,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042265620] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:28,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:28,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:28,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648436253] [2021-11-13 01:41:28,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:28,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:28,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:28,264 INFO L87 Difference]: Start difference. First operand 546 states and 903 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:28,475 INFO L93 Difference]: Finished difference Result 1100 states and 1834 transitions. [2021-11-13 01:41:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-13 01:41:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:28,482 INFO L225 Difference]: With dead ends: 1100 [2021-11-13 01:41:28,483 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 01:41:28,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:28,487 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 128 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:28,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2408 Invalid, 121 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 161.43ms Time] [2021-11-13 01:41:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 01:41:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 01:41:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6682027649769586) internal successors, (724), 454 states have internal predecessors, (724), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-13 01:41:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 898 transitions. [2021-11-13 01:41:28,516 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 898 transitions. Word has length 109 [2021-11-13 01:41:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:28,516 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 898 transitions. [2021-11-13 01:41:28,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 898 transitions. [2021-11-13 01:41:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:41:28,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:28,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:28,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:28,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:28,744 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash -214859330, now seen corresponding path program 1 times [2021-11-13 01:41:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:28,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061067012] [2021-11-13 01:41:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:28,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:28,746 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:28,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:41:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:29,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:41:29,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:29,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061067012] [2021-11-13 01:41:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061067012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:29,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:29,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:29,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559596955] [2021-11-13 01:41:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:29,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:29,813 INFO L87 Difference]: Start difference. First operand 546 states and 898 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:30,037 INFO L93 Difference]: Finished difference Result 1121 states and 1855 transitions. [2021-11-13 01:41:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:41:30,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-13 01:41:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:30,044 INFO L225 Difference]: With dead ends: 1121 [2021-11-13 01:41:30,045 INFO L226 Difference]: Without dead ends: 576 [2021-11-13 01:41:30,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:30,049 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 143 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.30ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:30,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2418 Invalid, 131 Unknown, 0 Unchecked, 5.30ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 173.24ms Time] [2021-11-13 01:41:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-13 01:41:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 561. [2021-11-13 01:41:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 449 states have (on average 1.645879732739421) internal successors, (739), 468 states have internal predecessors, (739), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 912 transitions. [2021-11-13 01:41:30,076 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 912 transitions. Word has length 111 [2021-11-13 01:41:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:30,076 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 912 transitions. [2021-11-13 01:41:30,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 912 transitions. [2021-11-13 01:41:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:41:30,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:30,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:30,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:30,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:30,305 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash -615041730, now seen corresponding path program 1 times [2021-11-13 01:41:30,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:30,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819882728] [2021-11-13 01:41:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:30,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:30,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:30,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:41:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:30,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:31,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:31,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:31,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819882728] [2021-11-13 01:41:31,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819882728] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:31,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:31,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:41:31,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931269436] [2021-11-13 01:41:31,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:31,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:31,575 INFO L87 Difference]: Start difference. First operand 561 states and 912 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:31,774 INFO L93 Difference]: Finished difference Result 1085 states and 1776 transitions. [2021-11-13 01:41:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-13 01:41:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:31,782 INFO L225 Difference]: With dead ends: 1085 [2021-11-13 01:41:31,782 INFO L226 Difference]: Without dead ends: 555 [2021-11-13 01:41:31,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:41:31,787 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 131 mSDsluCounter, 4198 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5069 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.35ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:31,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5069 Invalid, 75 Unknown, 0 Unchecked, 9.47ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 140.35ms Time] [2021-11-13 01:41:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-13 01:41:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 540. [2021-11-13 01:41:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6401869158878504) internal successors, (702), 447 states have internal predecessors, (702), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 875 transitions. [2021-11-13 01:41:31,814 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 875 transitions. Word has length 111 [2021-11-13 01:41:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:31,815 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 875 transitions. [2021-11-13 01:41:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 875 transitions. [2021-11-13 01:41:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 01:41:31,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:31,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:31,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:32,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:32,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2068180125, now seen corresponding path program 1 times [2021-11-13 01:41:32,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:32,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245371053] [2021-11-13 01:41:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:32,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:32,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:32,046 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:41:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:32,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:32,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:41:33,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:33,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245371053] [2021-11-13 01:41:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245371053] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:33,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:33,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:33,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30672751] [2021-11-13 01:41:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:33,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:33,181 INFO L87 Difference]: Start difference. First operand 540 states and 875 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:33,319 INFO L93 Difference]: Finished difference Result 1049 states and 1714 transitions. [2021-11-13 01:41:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:33,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-13 01:41:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:33,327 INFO L225 Difference]: With dead ends: 1049 [2021-11-13 01:41:33,327 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 01:41:33,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:33,332 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 69 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:33,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2432 Invalid, 54 Unknown, 0 Unchecked, 3.93ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 101.61ms Time] [2021-11-13 01:41:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 01:41:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 01:41:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6378504672897196) internal successors, (701), 447 states have internal predecessors, (701), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 874 transitions. [2021-11-13 01:41:33,361 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 874 transitions. Word has length 112 [2021-11-13 01:41:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:33,361 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 874 transitions. [2021-11-13 01:41:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 874 transitions. [2021-11-13 01:41:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:41:33,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:33,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:33,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:33,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:33,588 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1572582777, now seen corresponding path program 1 times [2021-11-13 01:41:33,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:33,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324258150] [2021-11-13 01:41:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:33,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:33,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:33,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:41:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:34,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:41:34,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:34,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324258150] [2021-11-13 01:41:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324258150] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:34,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:34,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:41:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010619127] [2021-11-13 01:41:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:34,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:34,725 INFO L87 Difference]: Start difference. First operand 540 states and 874 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:34,866 INFO L93 Difference]: Finished difference Result 1049 states and 1713 transitions. [2021-11-13 01:41:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:41:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-13 01:41:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:34,900 INFO L225 Difference]: With dead ends: 1049 [2021-11-13 01:41:34,900 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 01:41:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:34,904 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 67 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.85ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:34,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2432 Invalid, 52 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 103.85ms Time] [2021-11-13 01:41:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 01:41:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 01:41:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6355140186915889) internal successors, (700), 447 states have internal predecessors, (700), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 873 transitions. [2021-11-13 01:41:34,932 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 873 transitions. Word has length 113 [2021-11-13 01:41:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 873 transitions. [2021-11-13 01:41:34,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:41:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 873 transitions. [2021-11-13 01:41:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:41:34,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:34,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:34,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:35,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:35,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash 838590456, now seen corresponding path program 1 times [2021-11-13 01:41:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:35,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886446192] [2021-11-13 01:41:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:35,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:35,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:35,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:41:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:41:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:36,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:36,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:36,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886446192] [2021-11-13 01:41:36,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886446192] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:36,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:36,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:41:36,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18356844] [2021-11-13 01:41:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:36,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:36,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:36,534 INFO L87 Difference]: Start difference. First operand 540 states and 873 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:36,837 INFO L93 Difference]: Finished difference Result 1054 states and 1720 transitions. [2021-11-13 01:41:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-13 01:41:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:36,848 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 01:41:36,848 INFO L226 Difference]: Without dead ends: 551 [2021-11-13 01:41:36,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:36,857 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 109 mSDsluCounter, 4826 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:36,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5641 Invalid, 152 Unknown, 0 Unchecked, 8.58ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 206.24ms Time] [2021-11-13 01:41:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-13 01:41:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 542. [2021-11-13 01:41:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 430 states have (on average 1.630232558139535) internal successors, (701), 449 states have internal predecessors, (701), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 874 transitions. [2021-11-13 01:41:36,886 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 874 transitions. Word has length 114 [2021-11-13 01:41:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:36,887 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 874 transitions. [2021-11-13 01:41:36,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 874 transitions. [2021-11-13 01:41:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 01:41:36,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:36,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:36,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:37,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:37,107 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash -58596764, now seen corresponding path program 1 times [2021-11-13 01:41:37,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:37,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401204139] [2021-11-13 01:41:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:37,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:37,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:37,110 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:41:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:37,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:37,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:38,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:38,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401204139] [2021-11-13 01:41:38,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401204139] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:38,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:38,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:41:38,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636562746] [2021-11-13 01:41:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:38,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:38,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:38,390 INFO L87 Difference]: Start difference. First operand 542 states and 874 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:38,683 INFO L93 Difference]: Finished difference Result 1046 states and 1701 transitions. [2021-11-13 01:41:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-13 01:41:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:38,690 INFO L225 Difference]: With dead ends: 1046 [2021-11-13 01:41:38,690 INFO L226 Difference]: Without dead ends: 547 [2021-11-13 01:41:38,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:38,694 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 77 mSDsluCounter, 4832 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5649 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:38,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5649 Invalid, 152 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 205.24ms Time] [2021-11-13 01:41:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-13 01:41:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2021-11-13 01:41:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 432 states have (on average 1.625) internal successors, (702), 451 states have internal predecessors, (702), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 875 transitions. [2021-11-13 01:41:38,722 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 875 transitions. Word has length 115 [2021-11-13 01:41:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:38,722 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 875 transitions. [2021-11-13 01:41:38,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 875 transitions. [2021-11-13 01:41:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:41:38,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:38,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:38,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:38,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:38,950 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1849659454, now seen corresponding path program 1 times [2021-11-13 01:41:38,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:38,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887180435] [2021-11-13 01:41:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:38,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:38,953 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:41:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:39,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:40,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887180435] [2021-11-13 01:41:40,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887180435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:40,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:41:40,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647172171] [2021-11-13 01:41:40,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:40,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:41:40,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:41:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:40,062 INFO L87 Difference]: Start difference. First operand 544 states and 875 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:40,301 INFO L93 Difference]: Finished difference Result 992 states and 1628 transitions. [2021-11-13 01:41:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:41:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-13 01:41:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:40,307 INFO L225 Difference]: With dead ends: 992 [2021-11-13 01:41:40,307 INFO L226 Difference]: Without dead ends: 537 [2021-11-13 01:41:40,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:41:40,311 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 55 mSDsluCounter, 7337 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8166 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.01ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:40,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 8166 Invalid, 131 Unknown, 0 Unchecked, 10.47ms Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 187.01ms Time] [2021-11-13 01:41:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-13 01:41:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-13 01:41:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6329411764705883) internal successors, (694), 444 states have internal predecessors, (694), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 867 transitions. [2021-11-13 01:41:40,333 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 867 transitions. Word has length 116 [2021-11-13 01:41:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:40,333 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 867 transitions. [2021-11-13 01:41:40,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 867 transitions. [2021-11-13 01:41:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:41:40,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:40,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:40,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:40,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,565 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1632526870, now seen corresponding path program 1 times [2021-11-13 01:41:40,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:40,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505600552] [2021-11-13 01:41:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:40,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:40,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:40,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:41:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:41,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:41,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:41,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505600552] [2021-11-13 01:41:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505600552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:41,679 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:41:41,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036325846] [2021-11-13 01:41:41,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:41,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:41:41,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:41:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:41,682 INFO L87 Difference]: Start difference. First operand 537 states and 867 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:41,930 INFO L93 Difference]: Finished difference Result 997 states and 1642 transitions. [2021-11-13 01:41:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-13 01:41:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:41,938 INFO L225 Difference]: With dead ends: 997 [2021-11-13 01:41:41,938 INFO L226 Difference]: Without dead ends: 534 [2021-11-13 01:41:41,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:41:41,944 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 98 mSDsluCounter, 6463 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 7284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.28ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:41,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 7284 Invalid, 105 Unknown, 0 Unchecked, 10.47ms Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 188.28ms Time] [2021-11-13 01:41:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-13 01:41:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-13 01:41:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 422 states have (on average 1.632701421800948) internal successors, (689), 441 states have internal predecessors, (689), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 862 transitions. [2021-11-13 01:41:41,972 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 862 transitions. Word has length 117 [2021-11-13 01:41:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:41,972 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 862 transitions. [2021-11-13 01:41:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 862 transitions. [2021-11-13 01:41:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:41:41,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:41,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:42,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:42,191 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -294323606, now seen corresponding path program 1 times [2021-11-13 01:41:42,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:42,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233954569] [2021-11-13 01:41:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:42,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:42,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:41:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:42,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:43,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:43,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233954569] [2021-11-13 01:41:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233954569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:43,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:43,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:41:43,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227488000] [2021-11-13 01:41:43,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:43,248 INFO L87 Difference]: Start difference. First operand 534 states and 862 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:41:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:43,389 INFO L93 Difference]: Finished difference Result 994 states and 1637 transitions. [2021-11-13 01:41:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-13 01:41:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:43,396 INFO L225 Difference]: With dead ends: 994 [2021-11-13 01:41:43,396 INFO L226 Difference]: Without dead ends: 526 [2021-11-13 01:41:43,399 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 [2021-11-13 01:41:43,400 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 142 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4857 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.31ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:43,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4857 Invalid, 68 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 101.31ms Time] [2021-11-13 01:41:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-13 01:41:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-13 01:41:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 414 states have (on average 1.6376811594202898) internal successors, (678), 433 states have internal predecessors, (678), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 851 transitions. [2021-11-13 01:41:43,423 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 851 transitions. Word has length 117 [2021-11-13 01:41:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:43,423 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 851 transitions. [2021-11-13 01:41:43,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:41:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 851 transitions. [2021-11-13 01:41:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 01:41:43,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:43,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:43,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:43,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1988689946, now seen corresponding path program 1 times [2021-11-13 01:41:43,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:43,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127764030] [2021-11-13 01:41:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:43,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:43,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:43,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:41:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:41:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:44,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:44,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:44,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127764030] [2021-11-13 01:41:44,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127764030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:44,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:44,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:41:44,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165092306] [2021-11-13 01:41:44,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:44,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:41:44,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:44,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:41:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:44,915 INFO L87 Difference]: Start difference. First operand 526 states and 851 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:45,145 INFO L93 Difference]: Finished difference Result 980 states and 1615 transitions. [2021-11-13 01:41:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-13 01:41:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:45,152 INFO L225 Difference]: With dead ends: 980 [2021-11-13 01:41:45,152 INFO L226 Difference]: Without dead ends: 526 [2021-11-13 01:41:45,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:41:45,156 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 67 mSDsluCounter, 8005 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 8821 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.72ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:45,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 8821 Invalid, 158 Unknown, 0 Unchecked, 7.35ms Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 171.72ms Time] [2021-11-13 01:41:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-13 01:41:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-13 01:41:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 414 states have (on average 1.6352657004830917) internal successors, (677), 433 states have internal predecessors, (677), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 850 transitions. [2021-11-13 01:41:45,178 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 850 transitions. Word has length 118 [2021-11-13 01:41:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:45,179 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 850 transitions. [2021-11-13 01:41:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 850 transitions. [2021-11-13 01:41:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:41:45,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:45,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:45,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:45,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:45,408 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash -489065112, now seen corresponding path program 1 times [2021-11-13 01:41:45,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:45,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56581906] [2021-11-13 01:41:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:45,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:45,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:45,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:41:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:41:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:46,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:46,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56581906] [2021-11-13 01:41:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56581906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:46,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:46,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:41:46,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317923269] [2021-11-13 01:41:46,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:46,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:41:46,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:41:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:46,659 INFO L87 Difference]: Start difference. First operand 526 states and 850 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:46,947 INFO L93 Difference]: Finished difference Result 1024 states and 1672 transitions. [2021-11-13 01:41:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-13 01:41:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:46,953 INFO L225 Difference]: With dead ends: 1024 [2021-11-13 01:41:46,954 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 01:41:46,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:46,957 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 144 mSDsluCounter, 6369 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 7173 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.73ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:46,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 7173 Invalid, 136 Unknown, 0 Unchecked, 7.73ms Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 203.59ms Time] [2021-11-13 01:41:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 01:41:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-13 01:41:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 411 states have (on average 1.6277372262773722) internal successors, (669), 430 states have internal predecessors, (669), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 842 transitions. [2021-11-13 01:41:46,981 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 842 transitions. Word has length 119 [2021-11-13 01:41:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:46,982 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 842 transitions. [2021-11-13 01:41:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 842 transitions. [2021-11-13 01:41:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 01:41:46,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:46,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:47,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:47,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:47,209 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1906957611, now seen corresponding path program 1 times [2021-11-13 01:41:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:47,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074128137] [2021-11-13 01:41:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:47,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:47,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:47,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:41:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:47,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:48,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:48,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:48,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074128137] [2021-11-13 01:41:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074128137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:48,520 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:48,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:41:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625894664] [2021-11-13 01:41:48,521 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:41:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:41:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:48,522 INFO L87 Difference]: Start difference. First operand 523 states and 842 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:48,745 INFO L93 Difference]: Finished difference Result 971 states and 1595 transitions. [2021-11-13 01:41:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-13 01:41:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:48,753 INFO L225 Difference]: With dead ends: 971 [2021-11-13 01:41:48,753 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 01:41:48,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:41:48,757 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 68 mSDsluCounter, 7175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7980 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.47ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:48,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7980 Invalid, 156 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 163.47ms Time] [2021-11-13 01:41:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 01:41:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-13 01:41:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 411 states have (on average 1.6253041362530414) internal successors, (668), 430 states have internal predecessors, (668), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 841 transitions. [2021-11-13 01:41:48,778 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 841 transitions. Word has length 120 [2021-11-13 01:41:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:48,779 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 841 transitions. [2021-11-13 01:41:48,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 841 transitions. [2021-11-13 01:41:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:41:48,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:48,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:48,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:49,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:49,005 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1418850503, now seen corresponding path program 1 times [2021-11-13 01:41:49,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:49,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535748179] [2021-11-13 01:41:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:49,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:49,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:49,008 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:49,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:41:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:49,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:41:50,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:50,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535748179] [2021-11-13 01:41:50,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535748179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:50,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:50,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:41:50,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741711213] [2021-11-13 01:41:50,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:50,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:41:50,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:41:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:41:50,379 INFO L87 Difference]: Start difference. First operand 523 states and 841 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:50,617 INFO L93 Difference]: Finished difference Result 1009 states and 1640 transitions. [2021-11-13 01:41:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-13 01:41:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:50,624 INFO L225 Difference]: With dead ends: 1009 [2021-11-13 01:41:50,624 INFO L226 Difference]: Without dead ends: 520 [2021-11-13 01:41:50,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:50,628 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 113 mSDsluCounter, 5563 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.64ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:50,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6366 Invalid, 120 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 161.64ms Time] [2021-11-13 01:41:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-13 01:41:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2021-11-13 01:41:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 408 states have (on average 1.6176470588235294) internal successors, (660), 427 states have internal predecessors, (660), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-13 01:41:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 833 transitions. [2021-11-13 01:41:50,650 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 833 transitions. Word has length 121 [2021-11-13 01:41:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:50,651 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 833 transitions. [2021-11-13 01:41:50,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 01:41:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 833 transitions. [2021-11-13 01:41:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 01:41:50,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:50,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:50,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:50,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:50,878 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2027276592, now seen corresponding path program 1 times [2021-11-13 01:41:50,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:50,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545063333] [2021-11-13 01:41:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:50,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:50,880 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:50,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:41:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:41:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:41:51,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:41:52,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:52,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545063333] [2021-11-13 01:41:52,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545063333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:52,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:52,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 01:41:52,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297058237] [2021-11-13 01:41:52,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:52,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:41:52,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:41:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:41:52,923 INFO L87 Difference]: Start difference. First operand 520 states and 833 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 01:41:54,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:56,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:58,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:04,948 INFO L93 Difference]: Finished difference Result 1097 states and 1830 transitions. [2021-11-13 01:42:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:42:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-13 01:42:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:04,954 INFO L225 Difference]: With dead ends: 1097 [2021-11-13 01:42:04,954 INFO L226 Difference]: Without dead ends: 657 [2021-11-13 01:42:04,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:42:04,958 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 1418 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 4900 mSolverCounterSat, 539 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11052.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 4017 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.45ms SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 4900 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11767.94ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:04,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 4017 Invalid, 5442 Unknown, 0 Unchecked, 44.45ms Time], IncrementalHoareTripleChecker [539 Valid, 4900 Invalid, 3 Unknown, 0 Unchecked, 11767.94ms Time] [2021-11-13 01:42:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-13 01:42:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-11-13 01:42:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 411 states have (on average 1.6131386861313868) internal successors, (663), 430 states have internal predecessors, (663), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (100), 83 states have call predecessors, (100), 84 states have call successors, (100) [2021-11-13 01:42:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 852 transitions. [2021-11-13 01:42:04,989 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 852 transitions. Word has length 122 [2021-11-13 01:42:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 852 transitions. [2021-11-13 01:42:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 01:42:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 852 transitions. [2021-11-13 01:42:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 01:42:04,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:04,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:05,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:05,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:05,209 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 787134917, now seen corresponding path program 1 times [2021-11-13 01:42:05,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:05,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701945315] [2021-11-13 01:42:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:05,211 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:05,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 01:42:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:42:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:06,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:06,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:06,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701945315] [2021-11-13 01:42:06,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701945315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:06,634 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:06,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 01:42:06,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107044322] [2021-11-13 01:42:06,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:06,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:42:06,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:42:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:42:06,635 INFO L87 Difference]: Start difference. First operand 524 states and 852 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-13 01:42:08,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:10,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:16,133 INFO L93 Difference]: Finished difference Result 1813 states and 3107 transitions. [2021-11-13 01:42:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:42:16,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-13 01:42:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:16,146 INFO L225 Difference]: With dead ends: 1813 [2021-11-13 01:42:16,148 INFO L226 Difference]: Without dead ends: 1369 [2021-11-13 01:42:16,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:42:16,154 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 3840 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 3624 mSolverCounterSat, 1114 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8334.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3913 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 4740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.51ms SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 3624 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9133.55ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:16,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3913 Valid, 3068 Invalid, 4740 Unknown, 0 Unchecked, 36.51ms Time], IncrementalHoareTripleChecker [1114 Valid, 3624 Invalid, 2 Unknown, 0 Unchecked, 9133.55ms Time] [2021-11-13 01:42:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-13 01:42:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1281. [2021-11-13 01:42:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 999 states have (on average 1.6496496496496496) internal successors, (1648), 1047 states have internal predecessors, (1648), 226 states have call successors, (226), 54 states have call predecessors, (226), 55 states have return successors, (244), 216 states have call predecessors, (244), 221 states have call successors, (244) [2021-11-13 01:42:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2118 transitions. [2021-11-13 01:42:16,275 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2118 transitions. Word has length 123 [2021-11-13 01:42:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:16,277 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 2118 transitions. [2021-11-13 01:42:16,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-13 01:42:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2118 transitions. [2021-11-13 01:42:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:42:16,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:16,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:16,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:16,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:16,505 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1035670321, now seen corresponding path program 1 times [2021-11-13 01:42:16,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:16,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638439743] [2021-11-13 01:42:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:16,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:16,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:42:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:42:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:18,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:18,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638439743] [2021-11-13 01:42:18,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638439743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:18,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:18,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-13 01:42:18,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339190692] [2021-11-13 01:42:18,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:18,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 01:42:18,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 01:42:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:42:18,039 INFO L87 Difference]: Start difference. First operand 1281 states and 2118 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 01:42:20,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:22,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:24,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:34,297 INFO L93 Difference]: Finished difference Result 6541 states and 11380 transitions. [2021-11-13 01:42:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:42:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 125 [2021-11-13 01:42:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:34,335 INFO L225 Difference]: With dead ends: 6541 [2021-11-13 01:42:34,335 INFO L226 Difference]: Without dead ends: 5340 [2021-11-13 01:42:34,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:42:34,343 INFO L933 BasicCegarLoop]: 1721 mSDtfsCounter, 3879 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 7383 mSolverCounterSat, 1848 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14292.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 5070 SdHoareTripleChecker+Invalid, 9234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 91.38ms SdHoareTripleChecker+Time, 1848 IncrementalHoareTripleChecker+Valid, 7383 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15563.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:34,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3974 Valid, 5070 Invalid, 9234 Unknown, 0 Unchecked, 91.38ms Time], IncrementalHoareTripleChecker [1848 Valid, 7383 Invalid, 3 Unknown, 0 Unchecked, 15563.43ms Time] [2021-11-13 01:42:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-11-13 01:42:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 3021. [2021-11-13 01:42:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2242 states have (on average 1.6436217662801071) internal successors, (3685), 2388 states have internal predecessors, (3685), 665 states have call successors, (665), 100 states have call predecessors, (665), 113 states have return successors, (760), 654 states have call predecessors, (760), 660 states have call successors, (760) [2021-11-13 01:42:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5110 transitions. [2021-11-13 01:42:34,680 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5110 transitions. Word has length 125 [2021-11-13 01:42:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:34,681 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 5110 transitions. [2021-11-13 01:42:34,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 01:42:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5110 transitions. [2021-11-13 01:42:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:42:34,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:34,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:34,899 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1413929809, now seen corresponding path program 1 times [2021-11-13 01:42:34,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:34,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100017803] [2021-11-13 01:42:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:34,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:34,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:34,902 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:34,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 01:42:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:42:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:35,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:36,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:36,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100017803] [2021-11-13 01:42:36,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100017803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:36,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:36,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 01:42:36,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026697461] [2021-11-13 01:42:36,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:36,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:42:36,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:42:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:42:36,299 INFO L87 Difference]: Start difference. First operand 3021 states and 5110 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 01:42:38,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:40,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:45,050 INFO L93 Difference]: Finished difference Result 8107 states and 13882 transitions. [2021-11-13 01:42:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:42:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-13 01:42:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:45,084 INFO L225 Difference]: With dead ends: 8107 [2021-11-13 01:42:45,085 INFO L226 Difference]: Without dead ends: 5959 [2021-11-13 01:42:45,095 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 [2021-11-13 01:42:45,096 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 2674 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 3070 mSolverCounterSat, 603 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7564.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.89ms SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3070 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8209.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:45,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 2454 Invalid, 3675 Unknown, 0 Unchecked, 24.89ms Time], IncrementalHoareTripleChecker [603 Valid, 3070 Invalid, 2 Unknown, 0 Unchecked, 8209.56ms Time] [2021-11-13 01:42:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2021-11-13 01:42:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5568. [2021-11-13 01:42:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5568 states, 4153 states have (on average 1.6465205875270887) internal successors, (6838), 4426 states have internal predecessors, (6838), 1185 states have call successors, (1185), 180 states have call predecessors, (1185), 229 states have return successors, (1459), 1165 states have call predecessors, (1459), 1180 states have call successors, (1459) [2021-11-13 01:42:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5568 states to 5568 states and 9482 transitions. [2021-11-13 01:42:45,580 INFO L78 Accepts]: Start accepts. Automaton has 5568 states and 9482 transitions. Word has length 125 [2021-11-13 01:42:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:45,581 INFO L470 AbstractCegarLoop]: Abstraction has 5568 states and 9482 transitions. [2021-11-13 01:42:45,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-13 01:42:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5568 states and 9482 transitions. [2021-11-13 01:42:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:42:45,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:45,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:45,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:45,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:45,799 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 929290465, now seen corresponding path program 1 times [2021-11-13 01:42:45,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:45,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982130933] [2021-11-13 01:42:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:45,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:45,801 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 01:42:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:42:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:46,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:42:47,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:47,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982130933] [2021-11-13 01:42:47,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982130933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:47,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:47,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-13 01:42:47,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580070427] [2021-11-13 01:42:47,817 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:47,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:42:47,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:42:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:42:47,820 INFO L87 Difference]: Start difference. First operand 5568 states and 9482 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 01:42:49,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:51,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:53,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:55,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:05,500 INFO L93 Difference]: Finished difference Result 14991 states and 25644 transitions. [2021-11-13 01:43:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:43:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-13 01:43:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:05,580 INFO L225 Difference]: With dead ends: 14991 [2021-11-13 01:43:05,581 INFO L226 Difference]: Without dead ends: 10196 [2021-11-13 01:43:05,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:43:05,609 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 3282 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 6741 mSolverCounterSat, 834 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15374.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 7579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.27ms SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 6741 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16497.52ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:05,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 3764 Invalid, 7579 Unknown, 0 Unchecked, 44.27ms Time], IncrementalHoareTripleChecker [834 Valid, 6741 Invalid, 4 Unknown, 0 Unchecked, 16497.52ms Time] [2021-11-13 01:43:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10196 states. [2021-11-13 01:43:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10196 to 9902. [2021-11-13 01:43:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 7357 states have (on average 1.637624031534593) internal successors, (12048), 7838 states have internal predecessors, (12048), 2125 states have call successors, (2125), 330 states have call predecessors, (2125), 419 states have return successors, (2633), 2093 states have call predecessors, (2633), 2120 states have call successors, (2633) [2021-11-13 01:43:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 16806 transitions. [2021-11-13 01:43:06,548 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 16806 transitions. Word has length 130 [2021-11-13 01:43:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:06,548 INFO L470 AbstractCegarLoop]: Abstraction has 9902 states and 16806 transitions. [2021-11-13 01:43:06,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 01:43:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 16806 transitions. [2021-11-13 01:43:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 01:43:06,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:06,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:06,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:06,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:06,767 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1026998805, now seen corresponding path program 1 times [2021-11-13 01:43:06,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:06,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632475575] [2021-11-13 01:43:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:06,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:06,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:06,771 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:06,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 01:43:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:07,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:43:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:43:07,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:43:08,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:08,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632475575] [2021-11-13 01:43:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632475575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:08,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:08,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:43:08,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204089670] [2021-11-13 01:43:08,345 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:43:08,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:43:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:43:08,348 INFO L87 Difference]: Start difference. First operand 9902 states and 16806 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:43:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:09,166 INFO L93 Difference]: Finished difference Result 19563 states and 33468 transitions. [2021-11-13 01:43:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:43:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-13 01:43:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:09,245 INFO L225 Difference]: With dead ends: 19563 [2021-11-13 01:43:09,245 INFO L226 Difference]: Without dead ends: 9902 [2021-11-13 01:43:09,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:43:09,286 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 234 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3752 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.94ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:09,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3752 Invalid, 105 Unknown, 0 Unchecked, 5.94ms Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 117.41ms Time] [2021-11-13 01:43:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9902 states. [2021-11-13 01:43:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9902 to 9902. [2021-11-13 01:43:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 7357 states have (on average 1.6207693353268995) internal successors, (11924), 7838 states have internal predecessors, (11924), 2125 states have call successors, (2125), 330 states have call predecessors, (2125), 419 states have return successors, (2633), 2093 states have call predecessors, (2633), 2120 states have call successors, (2633) [2021-11-13 01:43:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 16682 transitions. [2021-11-13 01:43:10,108 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 16682 transitions. Word has length 137 [2021-11-13 01:43:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:10,108 INFO L470 AbstractCegarLoop]: Abstraction has 9902 states and 16682 transitions. [2021-11-13 01:43:10,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:43:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 16682 transitions. [2021-11-13 01:43:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:43:10,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:10,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:10,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-13 01:43:10,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:10,327 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -866797828, now seen corresponding path program 1 times [2021-11-13 01:43:10,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:10,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792433949] [2021-11-13 01:43:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:10,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:10,332 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:10,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 01:43:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:43:11,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:43:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 01:43:12,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:12,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792433949] [2021-11-13 01:43:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792433949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:12,163 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-13 01:43:12,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576864149] [2021-11-13 01:43:12,163 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:12,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:43:12,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:43:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:43:12,165 INFO L87 Difference]: Start difference. First operand 9902 states and 16682 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:43:14,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:16,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:21,209 INFO L93 Difference]: Finished difference Result 19693 states and 33244 transitions. [2021-11-13 01:43:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 01:43:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-13 01:43:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:21,279 INFO L225 Difference]: With dead ends: 19693 [2021-11-13 01:43:21,280 INFO L226 Difference]: Without dead ends: 10777 [2021-11-13 01:43:21,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:43:21,314 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 2619 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 650 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7522.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 3852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.37ms SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8115.54ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:21,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 2291 Invalid, 3852 Unknown, 0 Unchecked, 24.37ms Time], IncrementalHoareTripleChecker [650 Valid, 3200 Invalid, 2 Unknown, 0 Unchecked, 8115.54ms Time] [2021-11-13 01:43:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10777 states. [2021-11-13 01:43:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10777 to 10262. [2021-11-13 01:43:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10262 states, 7629 states have (on average 1.610696028313016) internal successors, (12288), 8130 states have internal predecessors, (12288), 2163 states have call successors, (2163), 362 states have call predecessors, (2163), 469 states have return successors, (2719), 2129 states have call predecessors, (2719), 2158 states have call successors, (2719) [2021-11-13 01:43:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10262 states to 10262 states and 17170 transitions. [2021-11-13 01:43:22,079 INFO L78 Accepts]: Start accepts. Automaton has 10262 states and 17170 transitions. Word has length 142 [2021-11-13 01:43:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:22,080 INFO L470 AbstractCegarLoop]: Abstraction has 10262 states and 17170 transitions. [2021-11-13 01:43:22,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-13 01:43:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10262 states and 17170 transitions. [2021-11-13 01:43:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 01:43:22,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:22,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:22,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:22,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:22,299 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 95028448, now seen corresponding path program 1 times [2021-11-13 01:43:22,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:22,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888936720] [2021-11-13 01:43:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:22,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:22,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:22,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 01:43:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:43:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:43:23,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:43:24,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:24,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888936720] [2021-11-13 01:43:24,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888936720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:24,875 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:24,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:43:24,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004646870] [2021-11-13 01:43:24,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:24,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:43:24,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:43:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:43:24,877 INFO L87 Difference]: Start difference. First operand 10262 states and 17170 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:43:26,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:28,906 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:30,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:32,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:34,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:44,300 INFO L93 Difference]: Finished difference Result 26062 states and 44260 transitions. [2021-11-13 01:43:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 01:43:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-13 01:43:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:44,415 INFO L225 Difference]: With dead ends: 26062 [2021-11-13 01:43:44,415 INFO L226 Difference]: Without dead ends: 15580 [2021-11-13 01:43:44,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:43:44,465 INFO L933 BasicCegarLoop]: 1069 mSDtfsCounter, 2676 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 6118 mSolverCounterSat, 708 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17060.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 6831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.22ms SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 6118 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18063.28ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:44,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2767 Valid, 4201 Invalid, 6831 Unknown, 0 Unchecked, 37.22ms Time], IncrementalHoareTripleChecker [708 Valid, 6118 Invalid, 5 Unknown, 0 Unchecked, 18063.28ms Time] [2021-11-13 01:43:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15580 states. [2021-11-13 01:43:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15580 to 14796. [2021-11-13 01:43:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14796 states, 10979 states have (on average 1.6057928773112304) internal successors, (17630), 11737 states have internal predecessors, (17630), 3149 states have call successors, (3149), 535 states have call predecessors, (3149), 667 states have return successors, (4053), 3043 states have call predecessors, (4053), 3144 states have call successors, (4053) [2021-11-13 01:43:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14796 states to 14796 states and 24832 transitions. [2021-11-13 01:43:45,673 INFO L78 Accepts]: Start accepts. Automaton has 14796 states and 24832 transitions. Word has length 147 [2021-11-13 01:43:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:45,674 INFO L470 AbstractCegarLoop]: Abstraction has 14796 states and 24832 transitions. [2021-11-13 01:43:45,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:43:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 14796 states and 24832 transitions. [2021-11-13 01:43:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 01:43:45,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:45,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:45,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:45,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:45,904 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1576396380, now seen corresponding path program 1 times [2021-11-13 01:43:45,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:45,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913849282] [2021-11-13 01:43:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:45,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:45,907 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:45,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 01:43:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:43:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:43:47,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:43:48,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:48,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913849282] [2021-11-13 01:43:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913849282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:48,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:48,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:43:48,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145896657] [2021-11-13 01:43:48,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:48,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:43:48,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:43:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:43:48,289 INFO L87 Difference]: Start difference. First operand 14796 states and 24832 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 01:43:50,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:52,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:02,801 INFO L93 Difference]: Finished difference Result 40062 states and 67900 transitions. [2021-11-13 01:44:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:44:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-13 01:44:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:03,166 INFO L225 Difference]: With dead ends: 40062 [2021-11-13 01:44:03,167 INFO L226 Difference]: Without dead ends: 26257 [2021-11-13 01:44:03,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:44:03,230 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 2668 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 7244 mSolverCounterSat, 697 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11304.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 7943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.09ms SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 7244 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12333.81ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:03,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 3865 Invalid, 7943 Unknown, 0 Unchecked, 40.09ms Time], IncrementalHoareTripleChecker [697 Valid, 7244 Invalid, 2 Unknown, 0 Unchecked, 12333.81ms Time] [2021-11-13 01:44:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26257 states. [2021-11-13 01:44:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26257 to 26159. [2021-11-13 01:44:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26159 states, 19330 states have (on average 1.6166063114330056) internal successors, (31249), 20657 states have internal predecessors, (31249), 5729 states have call successors, (5729), 967 states have call predecessors, (5729), 1099 states have return successors, (7046), 5534 states have call predecessors, (7046), 5724 states have call successors, (7046) [2021-11-13 01:44:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26159 states to 26159 states and 44024 transitions. [2021-11-13 01:44:05,579 INFO L78 Accepts]: Start accepts. Automaton has 26159 states and 44024 transitions. Word has length 147 [2021-11-13 01:44:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 26159 states and 44024 transitions. [2021-11-13 01:44:05,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 01:44:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26159 states and 44024 transitions. [2021-11-13 01:44:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:44:05,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:05,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:05,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:05,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:44:05,786 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 851544995, now seen corresponding path program 1 times [2021-11-13 01:44:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:05,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803681215] [2021-11-13 01:44:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:05,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:05,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:05,788 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:05,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 01:44:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:44:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:06,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:07,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:07,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803681215] [2021-11-13 01:44:07,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803681215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:07,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950228345] [2021-11-13 01:44:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:07,523 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:07,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:44:07,525 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:44:07,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 01:44:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:44:07,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:08,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1950228345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:08,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310503253] [2021-11-13 01:44:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:08,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:44:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:44:08,979 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:44:08,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 01:44:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:44:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 01:44:10,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310503253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:44:10,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:44:10,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-13 01:44:10,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574708765] [2021-11-13 01:44:10,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:44:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:44:10,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:44:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:44:10,638 INFO L87 Difference]: Start difference. First operand 26159 states and 44024 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-13 01:44:12,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:14,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:16,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:18,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:29,811 INFO L93 Difference]: Finished difference Result 105222 states and 178342 transitions. [2021-11-13 01:44:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:44:29,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-13 01:44:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:30,498 INFO L225 Difference]: With dead ends: 105222 [2021-11-13 01:44:30,498 INFO L226 Difference]: Without dead ends: 79141 [2021-11-13 01:44:30,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:44:30,601 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 2721 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4364 mSolverCounterSat, 755 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12720.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 5123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.17ms SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 4364 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13487.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:30,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 2619 Invalid, 5123 Unknown, 0 Unchecked, 28.17ms Time], IncrementalHoareTripleChecker [755 Valid, 4364 Invalid, 4 Unknown, 0 Unchecked, 13487.73ms Time] [2021-11-13 01:44:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79141 states. [2021-11-13 01:44:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79141 to 78743. [2021-11-13 01:44:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78743 states, 58223 states have (on average 1.6122494546828572) internal successors, (93870), 62271 states have internal predecessors, (93870), 17131 states have call successors, (17131), 2903 states have call predecessors, (17131), 3388 states have return successors, (22026), 16568 states have call predecessors, (22026), 17126 states have call successors, (22026) [2021-11-13 01:44:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78743 states to 78743 states and 133027 transitions. [2021-11-13 01:44:38,460 INFO L78 Accepts]: Start accepts. Automaton has 78743 states and 133027 transitions. Word has length 148 [2021-11-13 01:44:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:38,461 INFO L470 AbstractCegarLoop]: Abstraction has 78743 states and 133027 transitions. [2021-11-13 01:44:38,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-13 01:44:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 78743 states and 133027 transitions. [2021-11-13 01:44:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 01:44:38,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:38,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:38,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:38,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:38,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:39,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:44:39,065 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1262298978, now seen corresponding path program 1 times [2021-11-13 01:44:39,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:39,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803121602] [2021-11-13 01:44:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:39,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:39,069 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:39,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6126b738-be65-4904-914d-da511df61b97/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 01:44:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:39,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:44:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:44:39,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 01:44:40,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:40,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803121602] [2021-11-13 01:44:40,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803121602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:44:40,429 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:44:40,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 01:44:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746178204] [2021-11-13 01:44:40,430 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:44:40,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:44:40,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:44:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:44:40,431 INFO L87 Difference]: Start difference. First operand 78743 states and 133027 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 01:44:42,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:52,892 INFO L93 Difference]: Finished difference Result 183455 states and 309853 transitions. [2021-11-13 01:44:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:44:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-13 01:44:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:54,044 INFO L225 Difference]: With dead ends: 183455 [2021-11-13 01:44:54,044 INFO L226 Difference]: Without dead ends: 107536 [2021-11-13 01:44:54,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:44:54,330 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 469 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2630.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.97ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2747.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:54,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 4349 Invalid, 330 Unknown, 0 Unchecked, 10.97ms Time], IncrementalHoareTripleChecker [18 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 2747.05ms Time] [2021-11-13 01:44:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107536 states.