./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.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_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/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_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/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_e21efbc8-9511-453b-bf70-e699c38ac521/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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:41:27,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:41:28,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:41:28,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:41:28,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:41:28,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:41:28,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:41:28,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:41:28,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:41:28,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:41:28,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:41:28,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:41:28,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:41:28,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:41:28,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:41:28,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:41:28,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:41:28,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:41:28,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:41:28,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:41:28,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:41:28,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:41:28,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:41:28,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:41:28,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:41:28,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:41:28,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:41:28,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:41:28,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:41:28,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:41:28,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:41:28,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:41:28,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:41:28,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:41:28,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:41:28,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:41:28,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:41:28,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:41:28,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:41:28,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:41:28,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:41:28,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:41:28,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:41:28,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:41:28,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:41:28,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:41:28,159 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:41:28,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:41:28,160 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:41:28,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:41:28,166 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:41:28,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:41:28,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:41:28,168 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:41:28,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:41:28,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:41:28,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:41:28,169 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:41:28,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:41:28,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:41:28,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:41:28,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:41:28,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:41:28,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:41:28,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:41:28,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:41:28,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:41:28,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:41:28,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:41:28,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:41:28,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:41:28,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:41:28,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:41:28,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:28,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:41:28,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:41:28,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:41:28,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:41:28,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:41:28,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:41:28,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:41:28,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:41:28,176 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_e21efbc8-9511-453b-bf70-e699c38ac521/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2021-11-12 22:41:28,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:41:28,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:41:28,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:41:28,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:41:28,505 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:41:28,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-12 22:41:28,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/6d1d90ca9/849bb403c1694eb2a9c264480496503b/FLAGc9dd0f949 [2021-11-12 22:41:29,212 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:41:29,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-12 22:41:29,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/6d1d90ca9/849bb403c1694eb2a9c264480496503b/FLAGc9dd0f949 [2021-11-12 22:41:29,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/6d1d90ca9/849bb403c1694eb2a9c264480496503b [2021-11-12 22:41:29,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:41:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:41:29,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:29,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:41:29,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:41:29,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:29" (1/1) ... [2021-11-12 22:41:29,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757d4a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:29, skipping insertion in model container [2021-11-12 22:41:29,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:29" (1/1) ... [2021-11-12 22:41:29,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:41:29,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:29,828 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_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-12 22:41:30,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:30,200 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) [2021-11-12 22:41:30,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@510a6a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:30, skipping insertion in model container [2021-11-12 22:41:30,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:30,201 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:41:30,208 INFO L158 Benchmark]: Toolchain (without parser) took 779.15ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 60.2MB in the beginning and 100.1MB in the end (delta: -39.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:41:30,209 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory is still 49.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:41:30,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 772.16ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 60.0MB in the beginning and 100.1MB in the end (delta: -40.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:41:30,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory is still 49.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 772.16ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 60.0MB in the beginning and 100.1MB in the end (delta: -40.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1455]: 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_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/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_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/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_e21efbc8-9511-453b-bf70-e699c38ac521/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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:41:32,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:41:32,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:41:32,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:41:32,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:41:32,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:41:32,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:41:32,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:41:32,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:41:32,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:41:32,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:41:32,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:41:32,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:41:32,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:41:32,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:41:32,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:41:32,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:41:32,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:41:32,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:41:32,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:41:32,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:41:32,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:41:32,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:41:32,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:41:32,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:41:32,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:41:32,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:41:32,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:41:32,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:41:32,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:41:32,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:41:32,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:41:32,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:41:32,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:41:32,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:41:32,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:41:32,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:41:32,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:41:32,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:41:32,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:41:32,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:41:32,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:41:32,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:41:32,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:41:32,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:41:32,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:41:32,649 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:41:32,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:41:32,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:41:32,650 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:41:32,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:41:32,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:41:32,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:41:32,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:41:32,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:41:32,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:41:32,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:41:32,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:41:32,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:41:32,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:41:32,656 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:41:32,656 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:41:32,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:41:32,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:41:32,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:41:32,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:41:32,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:41:32,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:41:32,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:41:32,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:32,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:41:32,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:41:32,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:41:32,659 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:41:32,659 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:41:32,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:41:32,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:41:32,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:41:32,661 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_e21efbc8-9511-453b-bf70-e699c38ac521/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2021-11-12 22:41:33,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:41:33,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:41:33,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:41:33,093 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:41:33,096 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:41:33,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-12 22:41:33,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/5f1e7777e/46b2aace22cf45c3a8426638ad5043ac/FLAG6f76f2d88 [2021-11-12 22:41:33,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:41:33,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-12 22:41:33,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/5f1e7777e/46b2aace22cf45c3a8426638ad5043ac/FLAG6f76f2d88 [2021-11-12 22:41:34,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/data/5f1e7777e/46b2aace22cf45c3a8426638ad5043ac [2021-11-12 22:41:34,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:41:34,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:41:34,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:34,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:41:34,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:41:34,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:34" (1/1) ... [2021-11-12 22:41:34,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d182528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:34, skipping insertion in model container [2021-11-12 22:41:34,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:41:34" (1/1) ... [2021-11-12 22:41:34,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:41:34,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:34,395 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_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-12 22:41:34,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:34,893 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:41:34,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:41:34,921 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_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-12 22:41:35,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:35,022 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:41:35,040 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_e21efbc8-9511-453b-bf70-e699c38ac521/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-12 22:41:35,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:41:35,201 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:41:35,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35 WrapperNode [2021-11-12 22:41:35,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:41:35,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:41:35,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:41:35,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:41:35,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:41:35,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:41:35,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:41:35,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:41:35,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:41:35,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:41:35,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:41:35,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:41:35,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (1/1) ... [2021-11-12 22:41:35,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:41:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:41:35,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:41:35,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:41:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:41:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:41:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-12 22:41:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-12 22:41:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:41:35,589 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:41:35,589 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:41:35,589 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:41:35,589 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:41:35,589 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:41:35,589 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:41:35,590 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:41:35,590 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:41:35,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:41:35,590 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:41:35,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:41:35,590 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:41:35,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:41:35,591 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:41:35,591 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:41:35,591 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:41:35,591 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:41:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:41:35,592 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:41:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:41:35,592 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:41:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:41:35,592 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:41:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:41:35,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:41:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:41:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:41:35,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:41:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:41:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:41:35,594 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:41:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:41:35,594 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:41:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:41:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:41:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:41:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:41:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:41:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:41:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:41:35,596 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:41:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:41:35,596 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:41:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:41:35,596 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:41:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:41:35,597 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:41:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:41:35,597 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:41:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:41:35,597 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:41:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:41:35,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:41:35,598 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:41:35,598 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:41:35,598 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 22:41:35,598 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 22:41:40,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:41:40,070 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 22:41:40,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:41:40 BoogieIcfgContainer [2021-11-12 22:41:40,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:41:40,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:41:40,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:41:40,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:41:40,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:41:34" (1/3) ... [2021-11-12 22:41:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4676a77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:41:40, skipping insertion in model container [2021-11-12 22:41:40,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:41:35" (2/3) ... [2021-11-12 22:41:40,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4676a77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:41:40, skipping insertion in model container [2021-11-12 22:41:40,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:41:40" (3/3) ... [2021-11-12 22:41:40,085 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2021-11-12 22:41:40,095 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:41:40,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:41:40,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:41:40,168 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 [2021-11-12 22:41:40,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:41:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-12 22:41:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:41:40,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:40,255 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-12 22:41:40,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash 474929604, now seen corresponding path program 1 times [2021-11-12 22:41:40,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:40,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330674339] [2021-11-12 22:41:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:40,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:40,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:40,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:41:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:41:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:41:41,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:41:41,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:41,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330674339] [2021-11-12 22:41:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330674339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:41:41,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941331838] [2021-11-12 22:41:41,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:41,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:41,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:41:41,579 INFO L87 Difference]: Start difference. First operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:41,809 INFO L93 Difference]: Finished difference Result 1268 states and 2108 transitions. [2021-11-12 22:41:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:41:41,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-12 22:41:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:41,851 INFO L225 Difference]: With dead ends: 1268 [2021-11-12 22:41:41,851 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 22:41:41,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:41:41,875 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 15 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:41,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3060 Invalid, 43 Unknown, 0 Unchecked, 32.20ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 56.17ms Time] [2021-11-12 22:41:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 22:41:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2021-11-12 22:41:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 492 states have (on average 1.6524390243902438) internal successors, (813), 510 states have internal predecessors, (813), 110 states have call successors, (110), 30 states have call predecessors, (110), 28 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 22:41:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1030 transitions. [2021-11-12 22:41:42,050 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1030 transitions. Word has length 83 [2021-11-12 22:41:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:42,052 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1030 transitions. [2021-11-12 22:41:42,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1030 transitions. [2021-11-12 22:41:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:41:42,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:42,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-11-12 22:41:42,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:42,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:42,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2001716048, now seen corresponding path program 1 times [2021-11-12 22:41:42,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:42,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713303336] [2021-11-12 22:41:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:42,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:42,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:42,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:41:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:41:43,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:41:43,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713303336] [2021-11-12 22:41:43,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713303336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:43,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:43,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:41:43,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966433293] [2021-11-12 22:41:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:43,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:41:43,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:41:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:43,455 INFO L87 Difference]: Start difference. First operand 631 states and 1030 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:43,777 INFO L93 Difference]: Finished difference Result 1274 states and 2085 transitions. [2021-11-12 22:41:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:41:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-12 22:41:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:43,788 INFO L225 Difference]: With dead ends: 1274 [2021-11-12 22:41:43,788 INFO L226 Difference]: Without dead ends: 653 [2021-11-12 22:41:43,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:41:43,794 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 119 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6024 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:43,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 6024 Invalid, 98 Unknown, 0 Unchecked, 20.93ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 214.72ms Time] [2021-11-12 22:41:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-12 22:41:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 644. [2021-11-12 22:41:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 502 states have (on average 1.649402390438247) internal successors, (828), 522 states have internal predecessors, (828), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-12 22:41:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1052 transitions. [2021-11-12 22:41:43,869 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1052 transitions. Word has length 85 [2021-11-12 22:41:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:43,869 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1052 transitions. [2021-11-12 22:41:43,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1052 transitions. [2021-11-12 22:41:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:41:43,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:43,876 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] [2021-11-12 22:41:43,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:44,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:44,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1546466611, now seen corresponding path program 1 times [2021-11-12 22:41:44,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:44,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29765835] [2021-11-12 22:41:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:44,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:44,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:44,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:44,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:41:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:41:44,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:41:45,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:45,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29765835] [2021-11-12 22:41:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29765835] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:45,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:45,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:41:45,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546037851] [2021-11-12 22:41:45,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:45,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:41:45,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:45,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:41:45,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:45,245 INFO L87 Difference]: Start difference. First operand 644 states and 1052 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:45,647 INFO L93 Difference]: Finished difference Result 1294 states and 2118 transitions. [2021-11-12 22:41:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:41:45,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-12 22:41:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:45,655 INFO L225 Difference]: With dead ends: 1294 [2021-11-12 22:41:45,656 INFO L226 Difference]: Without dead ends: 662 [2021-11-12 22:41:45,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:41:45,662 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 105 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:45,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 6072 Invalid, 120 Unknown, 0 Unchecked, 14.81ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 314.30ms Time] [2021-11-12 22:41:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-12 22:41:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 644. [2021-11-12 22:41:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 502 states have (on average 1.649402390438247) internal successors, (828), 522 states have internal predecessors, (828), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-12 22:41:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1052 transitions. [2021-11-12 22:41:45,702 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1052 transitions. Word has length 86 [2021-11-12 22:41:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:45,703 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1052 transitions. [2021-11-12 22:41:45,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1052 transitions. [2021-11-12 22:41:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:41:45,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:45,707 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-12 22:41:45,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:45,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:45,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash -712971247, now seen corresponding path program 1 times [2021-11-12 22:41:45,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:45,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447895575] [2021-11-12 22:41:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:45,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:45,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:45,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:41:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:41:46,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:41:46,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:41:46,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:46,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447895575] [2021-11-12 22:41:46,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447895575] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:46,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:46,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:41:46,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97985953] [2021-11-12 22:41:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:46,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:41:46,894 INFO L87 Difference]: Start difference. First operand 644 states and 1052 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:46,994 INFO L93 Difference]: Finished difference Result 1279 states and 2093 transitions. [2021-11-12 22:41:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:41:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-12 22:41:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:47,001 INFO L225 Difference]: With dead ends: 1279 [2021-11-12 22:41:47,002 INFO L226 Difference]: Without dead ends: 645 [2021-11-12 22:41:47,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:41:47,007 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 22 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:47,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3027 Invalid, 36 Unknown, 0 Unchecked, 8.14ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 45.25ms Time] [2021-11-12 22:41:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-12 22:41:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2021-11-12 22:41:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 504 states have (on average 1.6488095238095237) internal successors, (831), 523 states have internal predecessors, (831), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-12 22:41:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1050 transitions. [2021-11-12 22:41:47,040 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1050 transitions. Word has length 86 [2021-11-12 22:41:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:47,040 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1050 transitions. [2021-11-12 22:41:47,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1050 transitions. [2021-11-12 22:41:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:41:47,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:47,043 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:41:47,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:47,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:47,262 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2147189279, now seen corresponding path program 1 times [2021-11-12 22:41:47,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:47,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957704129] [2021-11-12 22:41:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:47,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:47,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:47,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:47,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:41:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:41:47,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:41:48,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:48,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957704129] [2021-11-12 22:41:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957704129] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:48,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:48,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:41:48,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026073309] [2021-11-12 22:41:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:48,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:41:48,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:41:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:48,343 INFO L87 Difference]: Start difference. First operand 645 states and 1050 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:48,666 INFO L93 Difference]: Finished difference Result 1284 states and 2098 transitions. [2021-11-12 22:41:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:41:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-12 22:41:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:48,673 INFO L225 Difference]: With dead ends: 1284 [2021-11-12 22:41:48,673 INFO L226 Difference]: Without dead ends: 654 [2021-11-12 22:41:48,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:41:48,679 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 104 mSDsluCounter, 4990 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6015 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 246.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:48,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6015 Invalid, 107 Unknown, 0 Unchecked, 14.09ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 246.00ms Time] [2021-11-12 22:41:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-12 22:41:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2021-11-12 22:41:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 504 states have (on average 1.6488095238095237) internal successors, (831), 523 states have internal predecessors, (831), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-12 22:41:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1050 transitions. [2021-11-12 22:41:48,710 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1050 transitions. Word has length 88 [2021-11-12 22:41:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:48,710 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1050 transitions. [2021-11-12 22:41:48,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1050 transitions. [2021-11-12 22:41:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:41:48,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:48,713 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:41:48,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:41:48,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:48,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1261280866, now seen corresponding path program 1 times [2021-11-12 22:41:48,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:48,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306409522] [2021-11-12 22:41:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:48,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:48,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:48,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:48,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:41:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:41:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:41:49,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:41:49,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306409522] [2021-11-12 22:41:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306409522] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:49,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:49,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:41:49,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158918571] [2021-11-12 22:41:49,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:41:49,915 INFO L87 Difference]: Start difference. First operand 645 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:50,180 INFO L93 Difference]: Finished difference Result 1304 states and 2136 transitions. [2021-11-12 22:41:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:41:50,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-12 22:41:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:50,190 INFO L225 Difference]: With dead ends: 1304 [2021-11-12 22:41:50,190 INFO L226 Difference]: Without dead ends: 674 [2021-11-12 22:41:50,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:41:50,199 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 112 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:50,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2871 Invalid, 147 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 205.75ms Time] [2021-11-12 22:41:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-12 22:41:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 665. [2021-11-12 22:41:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 523 states have (on average 1.644359464627151) internal successors, (860), 542 states have internal predecessors, (860), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 22:41:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2021-11-12 22:41:50,230 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 89 [2021-11-12 22:41:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2021-11-12 22:41:50,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:41:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2021-11-12 22:41:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:41:50,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:50,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:41:50,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:50,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:50,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1064353946, now seen corresponding path program 1 times [2021-11-12 22:41:50,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:50,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084971800] [2021-11-12 22:41:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:50,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:50,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:50,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:41:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:41:51,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:41:51,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:51,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084971800] [2021-11-12 22:41:51,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084971800] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:51,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:51,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:41:51,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043012969] [2021-11-12 22:41:51,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:51,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:41:51,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:41:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:41:51,619 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:51,844 INFO L93 Difference]: Finished difference Result 1333 states and 2167 transitions. [2021-11-12 22:41:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:41:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2021-11-12 22:41:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:51,855 INFO L225 Difference]: With dead ends: 1333 [2021-11-12 22:41:51,857 INFO L226 Difference]: Without dead ends: 683 [2021-11-12 22:41:51,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:41:51,862 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 154 mSDsluCounter, 4918 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5931 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:51,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5931 Invalid, 89 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 160.37ms Time] [2021-11-12 22:41:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-12 22:41:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 665. [2021-11-12 22:41:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 523 states have (on average 1.644359464627151) internal successors, (860), 542 states have internal predecessors, (860), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 22:41:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2021-11-12 22:41:51,893 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 106 [2021-11-12 22:41:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:51,894 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2021-11-12 22:41:51,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2021-11-12 22:41:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:41:51,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:51,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:41:51,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:52,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:52,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1081676747, now seen corresponding path program 1 times [2021-11-12 22:41:52,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:52,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306342105] [2021-11-12 22:41:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:52,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:52,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:41:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:41:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:41:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:41:53,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:53,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306342105] [2021-11-12 22:41:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306342105] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:53,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:41:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169647242] [2021-11-12 22:41:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:53,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:41:53,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:41:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:41:53,440 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:53,797 INFO L93 Difference]: Finished difference Result 1328 states and 2158 transitions. [2021-11-12 22:41:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:41:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2021-11-12 22:41:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:53,812 INFO L225 Difference]: With dead ends: 1328 [2021-11-12 22:41:53,812 INFO L226 Difference]: Without dead ends: 678 [2021-11-12 22:41:53,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:41:53,819 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 112 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6914 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 250.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:53,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6914 Invalid, 160 Unknown, 0 Unchecked, 12.45ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 250.88ms Time] [2021-11-12 22:41:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-12 22:41:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 669. [2021-11-12 22:41:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 527 states have (on average 1.6394686907020872) internal successors, (864), 546 states have internal predecessors, (864), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 22:41:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1082 transitions. [2021-11-12 22:41:53,852 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1082 transitions. Word has length 107 [2021-11-12 22:41:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1082 transitions. [2021-11-12 22:41:53,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1082 transitions. [2021-11-12 22:41:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:41:53,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:53,855 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] [2021-11-12 22:41:53,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:54,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:54,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -310162653, now seen corresponding path program 1 times [2021-11-12 22:41:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:54,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147648741] [2021-11-12 22:41:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:54,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:54,078 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:41:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:41:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:41:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:41:55,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:55,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147648741] [2021-11-12 22:41:55,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147648741] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:55,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:55,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:41:55,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008304677] [2021-11-12 22:41:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:55,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:41:55,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:41:55,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:41:55,065 INFO L87 Difference]: Start difference. First operand 669 states and 1082 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:55,479 INFO L93 Difference]: Finished difference Result 1338 states and 2170 transitions. [2021-11-12 22:41:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:41:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-12 22:41:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:55,487 INFO L225 Difference]: With dead ends: 1338 [2021-11-12 22:41:55,487 INFO L226 Difference]: Without dead ends: 684 [2021-11-12 22:41:55,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:41:55,493 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 108 mSDsluCounter, 5917 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 291.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6922 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.73ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:55,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6922 Invalid, 179 Unknown, 0 Unchecked, 10.73ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 325.03ms Time] [2021-11-12 22:41:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-12 22:41:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 675. [2021-11-12 22:41:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 533 states have (on average 1.6322701688555348) internal successors, (870), 552 states have internal predecessors, (870), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 22:41:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1088 transitions. [2021-11-12 22:41:55,521 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1088 transitions. Word has length 92 [2021-11-12 22:41:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:55,522 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1088 transitions. [2021-11-12 22:41:55,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 22:41:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1088 transitions. [2021-11-12 22:41:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:41:55,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:55,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 22:41:55,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-12 22:41:55,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:55,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1224659792, now seen corresponding path program 1 times [2021-11-12 22:41:55,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:55,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673926037] [2021-11-12 22:41:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:55,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:55,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:55,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:55,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:41:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:41:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:41:56,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:41:56,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:56,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673926037] [2021-11-12 22:41:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673926037] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:56,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:56,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:41:56,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738923255] [2021-11-12 22:41:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:56,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:41:56,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:41:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:41:56,908 INFO L87 Difference]: Start difference. First operand 675 states and 1088 transitions. Second operand has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:57,304 INFO L93 Difference]: Finished difference Result 1352 states and 2186 transitions. [2021-11-12 22:41:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:41:57,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-11-12 22:41:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:57,312 INFO L225 Difference]: With dead ends: 1352 [2021-11-12 22:41:57,312 INFO L226 Difference]: Without dead ends: 692 [2021-11-12 22:41:57,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:41:57,318 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 108 mSDsluCounter, 5917 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6922 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.76ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 310.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:57,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6922 Invalid, 184 Unknown, 0 Unchecked, 7.76ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 310.59ms Time] [2021-11-12 22:41:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-12 22:41:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2021-11-12 22:41:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 541 states have (on average 1.6229205175600738) internal successors, (878), 560 states have internal predecessors, (878), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-12 22:41:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1096 transitions. [2021-11-12 22:41:57,346 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1096 transitions. Word has length 109 [2021-11-12 22:41:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:57,346 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1096 transitions. [2021-11-12 22:41:57,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:41:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1096 transitions. [2021-11-12 22:41:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 22:41:57,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:57,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 22:41:57,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:57,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:57,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2076857877, now seen corresponding path program 1 times [2021-11-12 22:41:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:57,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527360400] [2021-11-12 22:41:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:57,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:57,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:57,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:41:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:41:58,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:41:58,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:58,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527360400] [2021-11-12 22:41:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527360400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:58,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:58,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:41:58,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328923250] [2021-11-12 22:41:58,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:41:58,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:41:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:41:58,697 INFO L87 Difference]: Start difference. First operand 683 states and 1096 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:41:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:58,980 INFO L93 Difference]: Finished difference Result 1291 states and 2070 transitions. [2021-11-12 22:41:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:41:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 110 [2021-11-12 22:41:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:58,993 INFO L225 Difference]: With dead ends: 1291 [2021-11-12 22:41:58,993 INFO L226 Difference]: Without dead ends: 701 [2021-11-12 22:41:59,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:41:59,003 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 100 mSDsluCounter, 4966 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.84ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:59,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 5979 Invalid, 110 Unknown, 0 Unchecked, 6.84ms Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 227.37ms Time] [2021-11-12 22:41:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-12 22:41:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 690. [2021-11-12 22:41:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 545 states have (on average 1.618348623853211) internal successors, (882), 566 states have internal predecessors, (882), 111 states have call successors, (111), 32 states have call predecessors, (111), 33 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-12 22:41:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1105 transitions. [2021-11-12 22:41:59,060 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1105 transitions. Word has length 110 [2021-11-12 22:41:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:59,061 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1105 transitions. [2021-11-12 22:41:59,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:41:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1105 transitions. [2021-11-12 22:41:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:41:59,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:59,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:41:59,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:59,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:59,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 525764543, now seen corresponding path program 1 times [2021-11-12 22:41:59,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:59,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600548003] [2021-11-12 22:41:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:59,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:59,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:59,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:41:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:41:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:42:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:42:00,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:00,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600548003] [2021-11-12 22:42:00,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600548003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:00,437 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:00,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:42:00,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812548364] [2021-11-12 22:42:00,438 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:00,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:42:00,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:42:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:42:00,441 INFO L87 Difference]: Start difference. First operand 690 states and 1105 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:42:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:00,807 INFO L93 Difference]: Finished difference Result 1294 states and 2073 transitions. [2021-11-12 22:42:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:42:00,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2021-11-12 22:42:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:00,816 INFO L225 Difference]: With dead ends: 1294 [2021-11-12 22:42:00,816 INFO L226 Difference]: Without dead ends: 704 [2021-11-12 22:42:00,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:00,821 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 181 mSDsluCounter, 6056 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 7071 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.09ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:00,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 7071 Invalid, 150 Unknown, 0 Unchecked, 8.09ms Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 304.68ms Time] [2021-11-12 22:42:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-12 22:42:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2021-11-12 22:42:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 549 states have (on average 1.6138433515482695) internal successors, (886), 572 states have internal predecessors, (886), 112 states have call successors, (112), 32 states have call predecessors, (112), 35 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-11-12 22:42:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1114 transitions. [2021-11-12 22:42:00,856 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1114 transitions. Word has length 112 [2021-11-12 22:42:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:00,856 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1114 transitions. [2021-11-12 22:42:00,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:42:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1114 transitions. [2021-11-12 22:42:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 22:42:00,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:00,860 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-12 22:42:00,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:01,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:01,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1584246524, now seen corresponding path program 1 times [2021-11-12 22:42:01,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:01,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463727165] [2021-11-12 22:42:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:01,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:01,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:01,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:42:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:42:01,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:42:02,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:02,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463727165] [2021-11-12 22:42:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463727165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:02,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:02,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:42:02,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728182785] [2021-11-12 22:42:02,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:02,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:42:02,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:42:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:42:02,054 INFO L87 Difference]: Start difference. First operand 697 states and 1114 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:42:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:02,268 INFO L93 Difference]: Finished difference Result 1295 states and 2074 transitions. [2021-11-12 22:42:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:42:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 96 [2021-11-12 22:42:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:02,276 INFO L225 Difference]: With dead ends: 1295 [2021-11-12 22:42:02,276 INFO L226 Difference]: Without dead ends: 705 [2021-11-12 22:42:02,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:02,282 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 171 mSDsluCounter, 4936 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5953 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:02,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5953 Invalid, 93 Unknown, 0 Unchecked, 5.73ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 172.58ms Time] [2021-11-12 22:42:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-12 22:42:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 700. [2021-11-12 22:42:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 551 states have (on average 1.6116152450090744) internal successors, (888), 575 states have internal predecessors, (888), 112 states have call successors, (112), 32 states have call predecessors, (112), 36 states have return successors, (117), 106 states have call predecessors, (117), 109 states have call successors, (117) [2021-11-12 22:42:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1117 transitions. [2021-11-12 22:42:02,313 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1117 transitions. Word has length 96 [2021-11-12 22:42:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:02,313 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1117 transitions. [2021-11-12 22:42:02,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:42:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1117 transitions. [2021-11-12 22:42:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:42:02,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:02,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:02,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:02,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:02,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash 306489849, now seen corresponding path program 1 times [2021-11-12 22:42:02,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:02,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243198191] [2021-11-12 22:42:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:02,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:02,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:02,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:42:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:42:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:42:03,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:42:03,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:03,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243198191] [2021-11-12 22:42:03,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243198191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:03,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:03,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:42:03,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371111992] [2021-11-12 22:42:03,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:03,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:03,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:42:03,557 INFO L87 Difference]: Start difference. First operand 700 states and 1117 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:03,646 INFO L93 Difference]: Finished difference Result 1365 states and 2182 transitions. [2021-11-12 22:42:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:42:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-12 22:42:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:03,654 INFO L225 Difference]: With dead ends: 1365 [2021-11-12 22:42:03,654 INFO L226 Difference]: Without dead ends: 650 [2021-11-12 22:42:03,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:03,659 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 23 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3026 Invalid, 36 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 49.12ms Time] [2021-11-12 22:42:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-12 22:42:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-11-12 22:42:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 508 states have (on average 1.594488188976378) internal successors, (810), 527 states have internal predecessors, (810), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 22:42:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1027 transitions. [2021-11-12 22:42:03,691 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1027 transitions. Word has length 112 [2021-11-12 22:42:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:03,691 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1027 transitions. [2021-11-12 22:42:03,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1027 transitions. [2021-11-12 22:42:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:42:03,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:03,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:03,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:03,918 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1848361474, now seen corresponding path program 1 times [2021-11-12 22:42:03,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:03,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328982718] [2021-11-12 22:42:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:03,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:03,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:03,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:03,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:42:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:04,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:42:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:42:04,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:42:04,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:04,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328982718] [2021-11-12 22:42:04,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328982718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:04,957 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:04,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:42:04,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943893641] [2021-11-12 22:42:04,958 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:04,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:42:04,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:42:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:42:04,961 INFO L87 Difference]: Start difference. First operand 650 states and 1027 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:05,154 INFO L93 Difference]: Finished difference Result 1326 states and 2087 transitions. [2021-11-12 22:42:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:42:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-12 22:42:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:05,162 INFO L225 Difference]: With dead ends: 1326 [2021-11-12 22:42:05,162 INFO L226 Difference]: Without dead ends: 647 [2021-11-12 22:42:05,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:42:05,167 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 134 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:05,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3785 Invalid, 90 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 137.55ms Time] [2021-11-12 22:42:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-12 22:42:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-12 22:42:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 505 states have (on average 1.5742574257425743) internal successors, (795), 523 states have internal predecessors, (795), 110 states have call successors, (110), 33 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-12 22:42:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1012 transitions. [2021-11-12 22:42:05,198 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1012 transitions. Word has length 114 [2021-11-12 22:42:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:05,199 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1012 transitions. [2021-11-12 22:42:05,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:42:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1012 transitions. [2021-11-12 22:42:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:42:05,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:05,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-11-12 22:42:05,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:42:05,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:05,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 337097010, now seen corresponding path program 1 times [2021-11-12 22:42:05,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:05,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139006879] [2021-11-12 22:42:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:05,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:05,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:05,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:42:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:42:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:42:06,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:42:06,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:06,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139006879] [2021-11-12 22:42:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139006879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:06,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:42:06,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47403307] [2021-11-12 22:42:06,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:42:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:42:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:42:06,629 INFO L87 Difference]: Start difference. First operand 647 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:42:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:07,830 INFO L93 Difference]: Finished difference Result 2377 states and 3831 transitions. [2021-11-12 22:42:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:42:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-12 22:42:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:07,847 INFO L225 Difference]: With dead ends: 2377 [2021-11-12 22:42:07,847 INFO L226 Difference]: Without dead ends: 1791 [2021-11-12 22:42:07,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:42:07,853 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 1807 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 949.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.89ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1112.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:07,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 3824 Invalid, 310 Unknown, 0 Unchecked, 16.89ms Time], IncrementalHoareTripleChecker [9 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1112.66ms Time] [2021-11-12 22:42:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-11-12 22:42:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1661. [2021-11-12 22:42:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1313 states have (on average 1.6077684691546077) internal successors, (2111), 1348 states have internal predecessors, (2111), 272 states have call successors, (272), 79 states have call predecessors, (272), 75 states have return successors, (283), 249 states have call predecessors, (283), 267 states have call successors, (283) [2021-11-12 22:42:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2666 transitions. [2021-11-12 22:42:07,935 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2666 transitions. Word has length 99 [2021-11-12 22:42:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:07,936 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 2666 transitions. [2021-11-12 22:42:07,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:42:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2666 transitions. [2021-11-12 22:42:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 22:42:07,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:07,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:07,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:08,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:08,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -339206739, now seen corresponding path program 1 times [2021-11-12 22:42:08,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:08,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061155461] [2021-11-12 22:42:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:08,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:08,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:08,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:42:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:08,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:42:08,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:42:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:42:09,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:09,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061155461] [2021-11-12 22:42:09,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061155461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:09,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:09,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 22:42:09,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880280125] [2021-11-12 22:42:09,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:09,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:42:09,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:42:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:42:09,431 INFO L87 Difference]: Start difference. First operand 1661 states and 2666 transitions. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:42:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:10,133 INFO L93 Difference]: Finished difference Result 3750 states and 6032 transitions. [2021-11-12 22:42:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:42:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 153 [2021-11-12 22:42:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:10,153 INFO L225 Difference]: With dead ends: 3750 [2021-11-12 22:42:10,153 INFO L226 Difference]: Without dead ends: 2150 [2021-11-12 22:42:10,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:42:10,164 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 1448 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 456.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 5263 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.14ms SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 550.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:10,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 5263 Invalid, 324 Unknown, 0 Unchecked, 13.14ms Time], IncrementalHoareTripleChecker [271 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 550.77ms Time] [2021-11-12 22:42:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-11-12 22:42:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2013. [2021-11-12 22:42:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 1587 states have (on average 1.5608065532451165) internal successors, (2477), 1614 states have internal predecessors, (2477), 328 states have call successors, (328), 97 states have call predecessors, (328), 97 states have return successors, (371), 313 states have call predecessors, (371), 321 states have call successors, (371) [2021-11-12 22:42:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 3176 transitions. [2021-11-12 22:42:10,286 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 3176 transitions. Word has length 153 [2021-11-12 22:42:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:10,286 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 3176 transitions. [2021-11-12 22:42:10,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:42:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 3176 transitions. [2021-11-12 22:42:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 22:42:10,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:10,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:10,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:10,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:10,518 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 161173665, now seen corresponding path program 1 times [2021-11-12 22:42:10,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:10,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549272646] [2021-11-12 22:42:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:10,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:10,521 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:10,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:42:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:42:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:42:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:42:12,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:12,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549272646] [2021-11-12 22:42:12,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549272646] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:42:12,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:42:12,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:42:12,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790230965] [2021-11-12 22:42:12,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:12,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:12,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:12,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:12,018 INFO L87 Difference]: Start difference. First operand 2013 states and 3176 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:14,063 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 [] [2021-11-12 22:42:16,070 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 [] [2021-11-12 22:42:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:17,261 INFO L93 Difference]: Finished difference Result 3985 states and 6447 transitions. [2021-11-12 22:42:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:42:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 154 [2021-11-12 22:42:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:17,276 INFO L225 Difference]: With dead ends: 3985 [2021-11-12 22:42:17,276 INFO L226 Difference]: Without dead ends: 2033 [2021-11-12 22:42:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:42:17,290 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 888 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4978.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.36ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5119.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 2415 Invalid, 497 Unknown, 0 Unchecked, 9.36ms Time], IncrementalHoareTripleChecker [16 Valid, 479 Invalid, 2 Unknown, 0 Unchecked, 5119.08ms Time] [2021-11-12 22:42:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-12 22:42:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2033. [2021-11-12 22:42:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1602 states have (on average 1.5555555555555556) internal successors, (2492), 1629 states have internal predecessors, (2492), 328 states have call successors, (328), 102 states have call predecessors, (328), 102 states have return successors, (375), 313 states have call predecessors, (375), 321 states have call successors, (375) [2021-11-12 22:42:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3195 transitions. [2021-11-12 22:42:17,449 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3195 transitions. Word has length 154 [2021-11-12 22:42:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:17,450 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 3195 transitions. [2021-11-12 22:42:17,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3195 transitions. [2021-11-12 22:42:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:42:17,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:17,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:17,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:17,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:17,674 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2114939187, now seen corresponding path program 1 times [2021-11-12 22:42:17,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:17,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610660759] [2021-11-12 22:42:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:17,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:17,677 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:17,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:42:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:18,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:42:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:42:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:42:18,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:18,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610660759] [2021-11-12 22:42:18,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610660759] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:42:18,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:42:18,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:42:18,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825671241] [2021-11-12 22:42:18,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:18,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:18,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:18,968 INFO L87 Difference]: Start difference. First operand 2033 states and 3195 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:20,990 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 [] [2021-11-12 22:42:22,996 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 [] [2021-11-12 22:42:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:24,104 INFO L93 Difference]: Finished difference Result 4030 states and 6486 transitions. [2021-11-12 22:42:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:42:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 156 [2021-11-12 22:42:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:24,122 INFO L225 Difference]: With dead ends: 4030 [2021-11-12 22:42:24,122 INFO L226 Difference]: Without dead ends: 2058 [2021-11-12 22:42:24,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:42:24,135 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 901 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4847.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4990.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:24,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2416 Invalid, 499 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [14 Valid, 483 Invalid, 2 Unknown, 0 Unchecked, 4990.42ms Time] [2021-11-12 22:42:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-12 22:42:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 2058. [2021-11-12 22:42:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 1622 states have (on average 1.5487053020961776) internal successors, (2512), 1649 states have internal predecessors, (2512), 328 states have call successors, (328), 107 states have call predecessors, (328), 107 states have return successors, (379), 313 states have call predecessors, (379), 321 states have call successors, (379) [2021-11-12 22:42:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3219 transitions. [2021-11-12 22:42:24,247 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3219 transitions. Word has length 156 [2021-11-12 22:42:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 3219 transitions. [2021-11-12 22:42:24,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3219 transitions. [2021-11-12 22:42:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 22:42:24,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:24,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:24,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:24,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:24,470 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1958562273, now seen corresponding path program 1 times [2021-11-12 22:42:24,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:24,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468604199] [2021-11-12 22:42:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:24,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:24,472 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:24,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:42:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:42:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:42:25,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:42:25,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:25,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468604199] [2021-11-12 22:42:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468604199] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:42:25,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:42:25,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:42:25,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111782596] [2021-11-12 22:42:25,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:25,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:25,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:25,881 INFO L87 Difference]: Start difference. First operand 2058 states and 3219 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:27,910 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 [] [2021-11-12 22:42:29,917 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 [] [2021-11-12 22:42:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:30,949 INFO L93 Difference]: Finished difference Result 4085 states and 6535 transitions. [2021-11-12 22:42:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:42:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 158 [2021-11-12 22:42:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:30,969 INFO L225 Difference]: With dead ends: 4085 [2021-11-12 22:42:30,969 INFO L226 Difference]: Without dead ends: 2088 [2021-11-12 22:42:30,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:42:30,982 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 901 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4780.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.33ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4963.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:30,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2416 Invalid, 498 Unknown, 0 Unchecked, 6.33ms Time], IncrementalHoareTripleChecker [12 Valid, 484 Invalid, 2 Unknown, 0 Unchecked, 4963.87ms Time] [2021-11-12 22:42:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-11-12 22:42:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2088. [2021-11-12 22:42:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1647 states have (on average 1.5403764420157864) internal successors, (2537), 1674 states have internal predecessors, (2537), 328 states have call successors, (328), 112 states have call predecessors, (328), 112 states have return successors, (383), 313 states have call predecessors, (383), 321 states have call successors, (383) [2021-11-12 22:42:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3248 transitions. [2021-11-12 22:42:31,126 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3248 transitions. Word has length 158 [2021-11-12 22:42:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:31,127 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3248 transitions. [2021-11-12 22:42:31,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3248 transitions. [2021-11-12 22:42:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 22:42:31,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:31,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:31,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:31,352 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1654286469, now seen corresponding path program 1 times [2021-11-12 22:42:31,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:31,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125615372] [2021-11-12 22:42:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:31,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:31,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:31,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:42:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:31,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:42:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:42:32,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:42:32,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:32,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125615372] [2021-11-12 22:42:32,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125615372] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:42:32,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:42:32,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:42:32,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070691001] [2021-11-12 22:42:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:32,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:42:32,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:42:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:42:32,710 INFO L87 Difference]: Start difference. First operand 2088 states and 3248 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:34,734 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 [] [2021-11-12 22:42:36,740 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 [] [2021-11-12 22:42:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:42:37,650 INFO L93 Difference]: Finished difference Result 4150 states and 6594 transitions. [2021-11-12 22:42:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:42:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 160 [2021-11-12 22:42:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:42:37,665 INFO L225 Difference]: With dead ends: 4150 [2021-11-12 22:42:37,665 INFO L226 Difference]: Without dead ends: 2123 [2021-11-12 22:42:37,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:42:37,673 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 890 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4719.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.70ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4837.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:42:37,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2416 Invalid, 497 Unknown, 0 Unchecked, 5.70ms Time], IncrementalHoareTripleChecker [10 Valid, 485 Invalid, 2 Unknown, 0 Unchecked, 4837.76ms Time] [2021-11-12 22:42:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-12 22:42:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-11-12 22:42:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 1677 states have (on average 1.5307096004770424) internal successors, (2567), 1704 states have internal predecessors, (2567), 328 states have call successors, (328), 117 states have call predecessors, (328), 117 states have return successors, (387), 313 states have call predecessors, (387), 321 states have call successors, (387) [2021-11-12 22:42:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3282 transitions. [2021-11-12 22:42:37,777 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3282 transitions. Word has length 160 [2021-11-12 22:42:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:42:37,777 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3282 transitions. [2021-11-12 22:42:37,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:42:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3282 transitions. [2021-11-12 22:42:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 22:42:37,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:42:37,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:42:37,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:42:37,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:42:37,997 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:42:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:42:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 488543521, now seen corresponding path program 1 times [2021-11-12 22:42:37,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:42:37,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204705619] [2021-11-12 22:42:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:37,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:42:37,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:42:38,000 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:42:38,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:42:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:42:38,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:42:39,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:42:40,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:40,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204705619] [2021-11-12 22:42:40,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204705619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:42:40,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981746623] [2021-11-12 22:42:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:40,175 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:42:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:42:40,178 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:42:40,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:42:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:42:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:42:41,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:42:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981746623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:42:41,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757496351] [2021-11-12 22:42:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:42:41,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:42:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:42:41,908 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:42:41,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 22:42:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:42:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:42:42,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:42:43,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757496351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:42:43,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:42:43,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 22:42:43,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079266542] [2021-11-12 22:42:43,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:42:43,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:42:43,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:42:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:42:43,346 INFO L87 Difference]: Start difference. First operand 2123 states and 3282 transitions. Second operand has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 22:42:45,369 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 [] [2021-11-12 22:42:47,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:49,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:51,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:53,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:55,399 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 [] [2021-11-12 22:43:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:08,059 INFO L93 Difference]: Finished difference Result 7028 states and 11199 transitions. [2021-11-12 22:43:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:43:08,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) Word has length 162 [2021-11-12 22:43:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:08,109 INFO L225 Difference]: With dead ends: 7028 [2021-11-12 22:43:08,109 INFO L226 Difference]: Without dead ends: 4966 [2021-11-12 22:43:08,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:43:08,124 INFO L933 BasicCegarLoop]: 1938 mSDtfsCounter, 5671 mSDsluCounter, 4459 mSDsCounter, 0 mSdLazyCounter, 10168 mSolverCounterSat, 2107 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22570.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5760 SdHoareTripleChecker+Valid, 6397 SdHoareTripleChecker+Invalid, 12281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 80.11ms SdHoareTripleChecker+Time, 2107 IncrementalHoareTripleChecker+Valid, 10168 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24071.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:08,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5760 Valid, 6397 Invalid, 12281 Unknown, 0 Unchecked, 80.11ms Time], IncrementalHoareTripleChecker [2107 Valid, 10168 Invalid, 6 Unknown, 0 Unchecked, 24071.83ms Time] [2021-11-12 22:43:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-11-12 22:43:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4493. [2021-11-12 22:43:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 3505 states have (on average 1.5258202567760342) internal successors, (5348), 3571 states have internal predecessors, (5348), 721 states have call successors, (721), 231 states have call predecessors, (721), 266 states have return successors, (948), 719 states have call predecessors, (948), 709 states have call successors, (948) [2021-11-12 22:43:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 7017 transitions. [2021-11-12 22:43:08,440 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 7017 transitions. Word has length 162 [2021-11-12 22:43:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:08,440 INFO L470 AbstractCegarLoop]: Abstraction has 4493 states and 7017 transitions. [2021-11-12 22:43:08,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 22:43:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 7017 transitions. [2021-11-12 22:43:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:43:08,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:08,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:43:08,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:08,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:08,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:09,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:43:09,069 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1235537609, now seen corresponding path program 1 times [2021-11-12 22:43:09,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:09,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127568494] [2021-11-12 22:43:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:09,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:09,071 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:09,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:43:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:43:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:43:09,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:43:10,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127568494] [2021-11-12 22:43:10,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127568494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:43:10,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:43:10,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-12 22:43:10,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625910344] [2021-11-12 22:43:10,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:10,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:43:10,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:10,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:43:10,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:43:10,311 INFO L87 Difference]: Start difference. First operand 4493 states and 7017 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:43:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:10,732 INFO L93 Difference]: Finished difference Result 8752 states and 13730 transitions. [2021-11-12 22:43:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:43:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 163 [2021-11-12 22:43:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:10,763 INFO L225 Difference]: With dead ends: 8752 [2021-11-12 22:43:10,763 INFO L226 Difference]: Without dead ends: 4286 [2021-11-12 22:43:10,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:43:10,781 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 62 mSDsluCounter, 5634 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6582 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:10,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6582 Invalid, 172 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 217.37ms Time] [2021-11-12 22:43:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-11-12 22:43:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 4271. [2021-11-12 22:43:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 3329 states have (on average 1.541904475818564) internal successors, (5133), 3394 states have internal predecessors, (5133), 694 states have call successors, (694), 213 states have call predecessors, (694), 247 states have return successors, (884), 692 states have call predecessors, (884), 682 states have call successors, (884) [2021-11-12 22:43:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 6711 transitions. [2021-11-12 22:43:11,028 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 6711 transitions. Word has length 163 [2021-11-12 22:43:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:11,029 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 6711 transitions. [2021-11-12 22:43:11,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 22:43:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 6711 transitions. [2021-11-12 22:43:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 22:43:11,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:11,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:43:11,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:11,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:11,250 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash -69600288, now seen corresponding path program 1 times [2021-11-12 22:43:11,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:11,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334519925] [2021-11-12 22:43:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:11,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:11,252 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:11,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:43:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:43:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:43:12,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:43:12,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:12,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334519925] [2021-11-12 22:43:12,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334519925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:12,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126286196] [2021-11-12 22:43:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:12,990 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:43:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:43:12,991 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:43:12,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 22:43:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:43:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:43:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:43:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126286196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181886463] [2021-11-12 22:43:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:14,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:43:14,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:43:14,536 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:43:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-12 22:43:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:43:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:43:15,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:43:15,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181886463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:15,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:43:15,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 22:43:15,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637394361] [2021-11-12 22:43:15,889 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:43:15,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:43:15,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:43:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:43:15,891 INFO L87 Difference]: Start difference. First operand 4271 states and 6711 transitions. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 22:43:17,911 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 [] [2021-11-12 22:43:19,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:21,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:23,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:25,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:34,024 INFO L93 Difference]: Finished difference Result 10819 states and 17308 transitions. [2021-11-12 22:43:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:43:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) Word has length 170 [2021-11-12 22:43:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:34,065 INFO L225 Difference]: With dead ends: 10819 [2021-11-12 22:43:34,065 INFO L226 Difference]: Without dead ends: 6608 [2021-11-12 22:43:34,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:43:34,088 INFO L933 BasicCegarLoop]: 1795 mSDtfsCounter, 5109 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 6758 mSolverCounterSat, 1497 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16579.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5189 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 8260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.38ms SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 6758 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17593.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:34,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5189 Valid, 4750 Invalid, 8260 Unknown, 0 Unchecked, 38.38ms Time], IncrementalHoareTripleChecker [1497 Valid, 6758 Invalid, 5 Unknown, 0 Unchecked, 17593.38ms Time] [2021-11-12 22:43:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-12 22:43:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6399. [2021-11-12 22:43:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6399 states, 4965 states have (on average 1.5448136958710976) internal successors, (7670), 5060 states have internal predecessors, (7670), 1060 states have call successors, (1060), 309 states have call predecessors, (1060), 373 states have return successors, (1375), 1075 states have call predecessors, (1375), 1043 states have call successors, (1375) [2021-11-12 22:43:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6399 states to 6399 states and 10105 transitions. [2021-11-12 22:43:34,520 INFO L78 Accepts]: Start accepts. Automaton has 6399 states and 10105 transitions. Word has length 170 [2021-11-12 22:43:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:34,521 INFO L470 AbstractCegarLoop]: Abstraction has 6399 states and 10105 transitions. [2021-11-12 22:43:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-12 22:43:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6399 states and 10105 transitions. [2021-11-12 22:43:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:43:34,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:34,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:43:34,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:34,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:43:35,142 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 713971716, now seen corresponding path program 1 times [2021-11-12 22:43:35,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:35,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315860619] [2021-11-12 22:43:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:35,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:35,145 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:35,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:43:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:43:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:43:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 22:43:36,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:36,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315860619] [2021-11-12 22:43:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315860619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:36,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015861880] [2021-11-12 22:43:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:36,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:43:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:43:36,655 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:43:36,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 22:43:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:43:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:43:37,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 22:43:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1015861880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:37,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85389641] [2021-11-12 22:43:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:37,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:43:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:43:37,918 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:43:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-12 22:43:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:43:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:43:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 22:43:39,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85389641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:43:39,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:43:39,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 22:43:39,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897203464] [2021-11-12 22:43:39,125 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:43:39,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:43:39,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:43:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:43:39,127 INFO L87 Difference]: Start difference. First operand 6399 states and 10105 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 22:43:41,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:43,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:51,750 INFO L93 Difference]: Finished difference Result 25105 states and 40781 transitions. [2021-11-12 22:43:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:43:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) Word has length 171 [2021-11-12 22:43:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:51,885 INFO L225 Difference]: With dead ends: 25105 [2021-11-12 22:43:51,885 INFO L226 Difference]: Without dead ends: 18754 [2021-11-12 22:43:51,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:43:51,945 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 5573 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 4954 mSolverCounterSat, 1731 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10471.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5686 SdHoareTripleChecker+Valid, 3486 SdHoareTripleChecker+Invalid, 6687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.23ms SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 4954 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11492.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:51,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5686 Valid, 3486 Invalid, 6687 Unknown, 0 Unchecked, 40.23ms Time], IncrementalHoareTripleChecker [1731 Valid, 4954 Invalid, 2 Unknown, 0 Unchecked, 11492.14ms Time] [2021-11-12 22:43:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18754 states. [2021-11-12 22:43:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18754 to 17168. [2021-11-12 22:43:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 13282 states have (on average 1.5363650052702906) internal successors, (20406), 13557 states have internal predecessors, (20406), 2856 states have call successors, (2856), 879 states have call predecessors, (2856), 1029 states have return successors, (3942), 2869 states have call predecessors, (3942), 2818 states have call successors, (3942) [2021-11-12 22:43:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 27204 transitions. [2021-11-12 22:43:53,312 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 27204 transitions. Word has length 171 [2021-11-12 22:43:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 27204 transitions. [2021-11-12 22:43:53,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 22:43:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 27204 transitions. [2021-11-12 22:43:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 22:43:53,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:53,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:43:53,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:53,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:53,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:53,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:43:53,948 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2144131339, now seen corresponding path program 1 times [2021-11-12 22:43:53,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:53,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040974564] [2021-11-12 22:43:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:53,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:53,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:43:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:43:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:43:56,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:44:00,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:00,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040974564] [2021-11-12 22:44:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040974564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:00,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:00,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 22:44:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009409254] [2021-11-12 22:44:00,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:00,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:44:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:44:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:44:00,233 INFO L87 Difference]: Start difference. First operand 17168 states and 27204 transitions. Second operand has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-12 22:44:02,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:04,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:06,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:08,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:24,529 INFO L93 Difference]: Finished difference Result 51482 states and 83846 transitions. [2021-11-12 22:44:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:44:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 173 [2021-11-12 22:44:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:24,762 INFO L225 Difference]: With dead ends: 51482 [2021-11-12 22:44:24,762 INFO L226 Difference]: Without dead ends: 34350 [2021-11-12 22:44:24,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:44:24,901 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 8710 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 9228 mSolverCounterSat, 2445 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19612.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8925 SdHoareTripleChecker+Valid, 4663 SdHoareTripleChecker+Invalid, 11677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.29ms SdHoareTripleChecker+Time, 2445 IncrementalHoareTripleChecker+Valid, 9228 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21319.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:24,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8925 Valid, 4663 Invalid, 11677 Unknown, 0 Unchecked, 58.29ms Time], IncrementalHoareTripleChecker [2445 Valid, 9228 Invalid, 4 Unknown, 0 Unchecked, 21319.66ms Time] [2021-11-12 22:44:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34350 states. [2021-11-12 22:44:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34350 to 29838. [2021-11-12 22:44:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29838 states, 22766 states have (on average 1.522841078801722) internal successors, (34669), 23291 states have internal predecessors, (34669), 5324 states have call successors, (5324), 1504 states have call predecessors, (5324), 1747 states have return successors, (7343), 5300 states have call predecessors, (7343), 5268 states have call successors, (7343) [2021-11-12 22:44:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29838 states to 29838 states and 47336 transitions. [2021-11-12 22:44:27,442 INFO L78 Accepts]: Start accepts. Automaton has 29838 states and 47336 transitions. Word has length 173 [2021-11-12 22:44:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:27,445 INFO L470 AbstractCegarLoop]: Abstraction has 29838 states and 47336 transitions. [2021-11-12 22:44:27,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-12 22:44:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29838 states and 47336 transitions. [2021-11-12 22:44:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:44:27,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:27,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:44:27,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:27,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:27,679 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 960269808, now seen corresponding path program 1 times [2021-11-12 22:44:27,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:27,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987736171] [2021-11-12 22:44:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:27,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:27,682 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:27,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:44:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:44:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:44:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:44:28,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:44:29,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987736171] [2021-11-12 22:44:29,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987736171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:29,270 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:29,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 22:44:29,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890718179] [2021-11-12 22:44:29,270 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:29,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:44:29,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:29,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:44:29,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:44:29,272 INFO L87 Difference]: Start difference. First operand 29838 states and 47336 transitions. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-12 22:44:31,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:33,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:35,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:37,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:52,680 INFO L93 Difference]: Finished difference Result 97993 states and 168519 transitions. [2021-11-12 22:44:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:44:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) Word has length 177 [2021-11-12 22:44:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:53,455 INFO L225 Difference]: With dead ends: 97993 [2021-11-12 22:44:53,455 INFO L226 Difference]: Without dead ends: 68107 [2021-11-12 22:44:53,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:44:53,835 INFO L933 BasicCegarLoop]: 1959 mSDtfsCounter, 4929 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 9313 mSolverCounterSat, 1687 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17159.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5044 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.05ms SdHoareTripleChecker+Time, 1687 IncrementalHoareTripleChecker+Valid, 9313 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18483.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:53,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5044 Valid, 5171 Invalid, 11004 Unknown, 0 Unchecked, 49.05ms Time], IncrementalHoareTripleChecker [1687 Valid, 9313 Invalid, 4 Unknown, 0 Unchecked, 18483.53ms Time] [2021-11-12 22:44:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68107 states. [2021-11-12 22:44:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68107 to 59464. [2021-11-12 22:44:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59464 states, 43796 states have (on average 1.5095442506164947) internal successors, (66112), 45293 states have internal predecessors, (66112), 12377 states have call successors, (12377), 2492 states have call predecessors, (12377), 3290 states have return successors, (18091), 12602 states have call predecessors, (18091), 12282 states have call successors, (18091) [2021-11-12 22:44:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59464 states to 59464 states and 96580 transitions. [2021-11-12 22:44:58,739 INFO L78 Accepts]: Start accepts. Automaton has 59464 states and 96580 transitions. Word has length 177 [2021-11-12 22:44:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:58,740 INFO L470 AbstractCegarLoop]: Abstraction has 59464 states and 96580 transitions. [2021-11-12 22:44:58,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-12 22:44:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 59464 states and 96580 transitions. [2021-11-12 22:44:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:44:58,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:58,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 22:44:58,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-12 22:44:58,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:58,947 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash -950772750, now seen corresponding path program 1 times [2021-11-12 22:44:58,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:58,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702744050] [2021-11-12 22:44:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:58,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:58,949 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:44:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:44:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:45:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:45:01,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:01,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702744050] [2021-11-12 22:45:01,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702744050] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:45:01,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:45:01,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-12 22:45:01,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661405073] [2021-11-12 22:45:01,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:45:01,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:45:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:45:01,198 INFO L87 Difference]: Start difference. First operand 59464 states and 96580 transitions. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:45:03,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:05,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:07,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:09,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:11,248 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 [] [2021-11-12 22:45:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:20,123 INFO L93 Difference]: Finished difference Result 105932 states and 172501 transitions. [2021-11-12 22:45:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:45:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 177 [2021-11-12 22:45:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:20,901 INFO L225 Difference]: With dead ends: 105932 [2021-11-12 22:45:20,902 INFO L226 Difference]: Without dead ends: 60293 [2021-11-12 22:45:21,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:45:21,176 INFO L933 BasicCegarLoop]: 1900 mSDtfsCounter, 3894 mSDsluCounter, 4814 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 876 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14043.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3902 SdHoareTripleChecker+Valid, 6714 SdHoareTripleChecker+Invalid, 3865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.97ms SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14673.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3902 Valid, 6714 Invalid, 3865 Unknown, 0 Unchecked, 32.97ms Time], IncrementalHoareTripleChecker [876 Valid, 2984 Invalid, 5 Unknown, 0 Unchecked, 14673.20ms Time] [2021-11-12 22:45:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60293 states. [2021-11-12 22:45:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60293 to 59338. [2021-11-12 22:45:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59338 states, 43722 states have (on average 1.5097205068386625) internal successors, (66008), 45219 states have internal predecessors, (66008), 12347 states have call successors, (12347), 2470 states have call predecessors, (12347), 3268 states have return successors, (18061), 12572 states have call predecessors, (18061), 12252 states have call successors, (18061) [2021-11-12 22:45:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59338 states to 59338 states and 96416 transitions. [2021-11-12 22:45:25,618 INFO L78 Accepts]: Start accepts. Automaton has 59338 states and 96416 transitions. Word has length 177 [2021-11-12 22:45:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:25,619 INFO L470 AbstractCegarLoop]: Abstraction has 59338 states and 96416 transitions. [2021-11-12 22:45:25,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:45:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59338 states and 96416 transitions. [2021-11-12 22:45:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 22:45:25,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:25,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-11-12 22:45:25,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:25,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:45:25,846 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2019364969, now seen corresponding path program 1 times [2021-11-12 22:45:25,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:25,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809870470] [2021-11-12 22:45:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:25,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:25,848 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:25,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21efbc8-9511-453b-bf70-e699c38ac521/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:45:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:26,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:45:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:45:26,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:45:27,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:27,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809870470] [2021-11-12 22:45:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809870470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:27,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:45:27,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848786993] [2021-11-12 22:45:27,233 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:27,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:45:27,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:45:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:45:27,239 INFO L87 Difference]: Start difference. First operand 59338 states and 96416 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 8 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-12 22:45:29,270 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 [] [2021-11-12 22:45:31,276 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 [] [2021-11-12 22:45:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:50,498 INFO L93 Difference]: Finished difference Result 215919 states and 387581 transitions. [2021-11-12 22:45:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:45:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 8 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 184 [2021-11-12 22:45:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:51,771 INFO L225 Difference]: With dead ends: 215919 [2021-11-12 22:45:51,771 INFO L226 Difference]: Without dead ends: 156569 [2021-11-12 22:45:53,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:45:53,072 INFO L933 BasicCegarLoop]: 1947 mSDtfsCounter, 4659 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 1480 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8602.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4775 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.17ms SdHoareTripleChecker+Time, 1480 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9503.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:53,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4775 Valid, 3216 Invalid, 4708 Unknown, 0 Unchecked, 28.17ms Time], IncrementalHoareTripleChecker [1480 Valid, 3226 Invalid, 2 Unknown, 0 Unchecked, 9503.99ms Time] [2021-11-12 22:45:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156569 states.