./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:16:58,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:16:58,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:16:58,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:16:58,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:16:58,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:16:58,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:16:58,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:16:58,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:16:58,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:16:58,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:16:58,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:16:58,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:16:58,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:16:58,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:16:58,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:16:58,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:16:58,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:16:58,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:16:58,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:16:58,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:16:58,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:16:58,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:16:58,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:16:58,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:16:58,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:16:59,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:16:59,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:16:59,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:16:59,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:16:59,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:16:59,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:16:59,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:16:59,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:16:59,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:16:59,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:16:59,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:16:59,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:16:59,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:16:59,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:16:59,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:16:59,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:16:59,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:16:59,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:16:59,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:16:59,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:16:59,039 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:16:59,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:16:59,040 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:16:59,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:16:59,040 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:16:59,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:16:59,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:16:59,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:16:59,041 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:16:59,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:16:59,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:16:59,041 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:16:59,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:16:59,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:16:59,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:16:59,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:16:59,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:16:59,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:16:59,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:16:59,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:16:59,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:16:59,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:16:59,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:16:59,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:16:59,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:16:59,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:16:59,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:16:59,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:16:59,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:16:59,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:16:59,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:16:59,047 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2021-11-12 22:16:59,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:16:59,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:16:59,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:16:59,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:16:59,356 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:16:59,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-12 22:16:59,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/9b7a00f49/1405b23f24c14370a32423d1d1475318/FLAGcee3bb849 [2021-11-12 22:17:00,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:00,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-12 22:17:00,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/9b7a00f49/1405b23f24c14370a32423d1d1475318/FLAGcee3bb849 [2021-11-12 22:17:00,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/9b7a00f49/1405b23f24c14370a32423d1d1475318 [2021-11-12 22:17:00,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:00,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:00,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:00,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:00,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:00,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:00" (1/1) ... [2021-11-12 22:17:00,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b07bc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:00, skipping insertion in model container [2021-11-12 22:17:00,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:00" (1/1) ... [2021-11-12 22:17:00,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:00,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:00,606 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-12 22:17:00,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:01,010 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 22:17:01,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59622d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:01, skipping insertion in model container [2021-11-12 22:17:01,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:01,011 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:17:01,013 INFO L158 Benchmark]: Toolchain (without parser) took 715.94ms. Allocated memory is still 119.5MB. Free memory was 74.7MB in the beginning and 78.7MB in the end (delta: -4.0MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2021-11-12 22:17:01,014 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:17:01,015 INFO L158 Benchmark]: CACSL2BoogieTranslator took 713.03ms. Allocated memory is still 119.5MB. Free memory was 74.5MB in the beginning and 78.7MB in the end (delta: -4.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-11-12 22:17:01,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 93.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 713.03ms. Allocated memory is still 119.5MB. Free memory was 74.5MB in the beginning and 78.7MB in the end (delta: -4.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:17:03,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:17:03,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:17:03,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:17:03,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:17:03,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:17:03,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:17:03,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:17:03,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:17:03,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:17:03,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:17:03,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:17:03,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:17:03,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:17:03,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:17:03,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:17:03,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:17:03,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:17:03,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:17:03,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:17:03,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:17:03,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:17:03,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:17:03,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:17:03,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:17:03,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:17:03,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:17:03,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:17:03,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:17:03,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:17:03,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:17:03,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:17:03,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:17:03,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:17:03,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:17:03,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:17:03,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:17:03,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:17:03,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:17:03,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:17:03,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:17:03,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:17:03,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:17:03,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:17:03,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:17:03,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:17:03,319 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:17:03,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:17:03,320 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:17:03,320 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:17:03,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:17:03,320 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:17:03,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:17:03,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:17:03,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:17:03,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:17:03,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:17:03,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:17:03,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:17:03,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:17:03,324 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:17:03,325 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:17:03,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:17:03,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:17:03,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:17:03,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:17:03,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:17:03,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:17:03,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:17:03,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:03,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:17:03,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:17:03,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:17:03,327 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:17:03,328 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:17:03,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:17:03,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:17:03,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:17:03,329 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2021-11-12 22:17:03,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:17:03,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:17:03,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:17:03,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:17:03,731 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:17:03,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-12 22:17:03,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/54d948db9/d404d66473e34dd4bfb53384601ba077/FLAG122759d00 [2021-11-12 22:17:04,469 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:17:04,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-12 22:17:04,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/54d948db9/d404d66473e34dd4bfb53384601ba077/FLAG122759d00 [2021-11-12 22:17:04,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/data/54d948db9/d404d66473e34dd4bfb53384601ba077 [2021-11-12 22:17:04,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:17:04,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:17:04,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:04,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:17:04,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:17:04,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:04" (1/1) ... [2021-11-12 22:17:04,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a797c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:04, skipping insertion in model container [2021-11-12 22:17:04,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:17:04" (1/1) ... [2021-11-12 22:17:04,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:17:04,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:04,921 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-12 22:17:05,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:05,364 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:17:05,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:17:05,391 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-12 22:17:05,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:05,566 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:17:05,582 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_21f1909d-6bca-403f-af7b-07e8a99e1bf6/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-12 22:17:05,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:17:05,752 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:17:05,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05 WrapperNode [2021-11-12 22:17:05,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:17:05,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:05,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:17:05,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:17:05,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:17:05,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:17:05,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:17:05,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:17:05,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:05,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:06,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:06,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:06,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:17:06,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:17:06,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:17:06,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:17:06,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (1/1) ... [2021-11-12 22:17:06,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:17:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:17:06,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:17:06,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:17:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:17:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:17:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:17:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:17:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:17:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:17:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:17:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:17:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:17:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:17:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:17:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:17:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:17:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:17:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:17:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:17:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:17:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:17:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:17:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:17:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:17:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:17:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:17:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:17:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:17:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:17:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:17:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:17:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:17:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:17:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:17:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:17:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:17:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:17:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:17:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:17:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:17:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:17:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:17:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:17:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:17:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:17:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:17:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:17:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:17:06,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:17:06,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:17:06,155 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:17:06,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:17:10,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:17:10,033 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:17:10,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:10 BoogieIcfgContainer [2021-11-12 22:17:10,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:17:10,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:17:10,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:17:10,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:17:10,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:17:04" (1/3) ... [2021-11-12 22:17:10,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c358af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:10, skipping insertion in model container [2021-11-12 22:17:10,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:17:05" (2/3) ... [2021-11-12 22:17:10,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c358af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:17:10, skipping insertion in model container [2021-11-12 22:17:10,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:17:10" (3/3) ... [2021-11-12 22:17:10,049 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2021-11-12 22:17:10,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:17:10,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:17:10,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:17:10,133 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 22:17:10,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:17:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 583 states, 449 states have (on average 1.6748329621380846) internal successors, (752), 467 states have internal predecessors, (752), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-12 22:17:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:17:10,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:10,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:10,198 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash -766320480, now seen corresponding path program 1 times [2021-11-12 22:17:10,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:10,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173217646] [2021-11-12 22:17:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:10,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:10,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:10,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:17:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:10,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:11,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:11,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:11,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173217646] [2021-11-12 22:17:11,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173217646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:11,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:11,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:17:11,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25907851] [2021-11-12 22:17:11,977 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:11,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:17:11,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:17:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:12,017 INFO L87 Difference]: Start difference. First operand has 583 states, 449 states have (on average 1.6748329621380846) internal successors, (752), 467 states have internal predecessors, (752), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:12,494 INFO L93 Difference]: Finished difference Result 1169 states and 1949 transitions. [2021-11-12 22:17:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:17:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-12 22:17:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:12,541 INFO L225 Difference]: With dead ends: 1169 [2021-11-12 22:17:12,544 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 22:17:12,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 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 22:17:12,568 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 118 mSDsluCounter, 5581 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.39ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:12,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6527 Invalid, 106 Unknown, 0 Unchecked, 53.39ms Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 198.11ms Time] [2021-11-12 22:17:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 22:17:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 586. [2021-11-12 22:17:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 452 states have (on average 1.665929203539823) internal successors, (753), 470 states have internal predecessors, (753), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-12 22:17:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 966 transitions. [2021-11-12 22:17:12,715 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 966 transitions. Word has length 113 [2021-11-12 22:17:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:12,716 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 966 transitions. [2021-11-12 22:17:12,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 966 transitions. [2021-11-12 22:17:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:17:12,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:12,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:12,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:12,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:12,947 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1891470132, now seen corresponding path program 1 times [2021-11-12 22:17:12,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:12,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079197304] [2021-11-12 22:17:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:12,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:12,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:12,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:17:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:13,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:14,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:14,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079197304] [2021-11-12 22:17:14,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079197304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:14,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:14,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:17:14,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129709798] [2021-11-12 22:17:14,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:14,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:17:14,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:17:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:14,364 INFO L87 Difference]: Start difference. First operand 586 states and 966 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:14,694 INFO L93 Difference]: Finished difference Result 1177 states and 1950 transitions. [2021-11-12 22:17:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:17:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-12 22:17:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:14,701 INFO L225 Difference]: With dead ends: 1177 [2021-11-12 22:17:14,701 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 22:17:14,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 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 22:17:14,707 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 104 mSDsluCounter, 7361 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 8307 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:14,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 8307 Invalid, 132 Unknown, 0 Unchecked, 18.09ms Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 217.68ms Time] [2021-11-12 22:17:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 22:17:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 599. [2021-11-12 22:17:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6623376623376624) internal successors, (768), 482 states have internal predecessors, (768), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-12 22:17:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 985 transitions. [2021-11-12 22:17:14,757 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 985 transitions. Word has length 114 [2021-11-12 22:17:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:14,757 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 985 transitions. [2021-11-12 22:17:14,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 985 transitions. [2021-11-12 22:17:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:17:14,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:14,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:14,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:14,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:14,984 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash 715563076, now seen corresponding path program 1 times [2021-11-12 22:17:14,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:14,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525232654] [2021-11-12 22:17:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:14,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:14,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:15,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:17:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:15,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:16,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:16,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525232654] [2021-11-12 22:17:16,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525232654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:16,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:17:16,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146935300] [2021-11-12 22:17:16,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:16,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:17:16,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:17:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:16,422 INFO L87 Difference]: Start difference. First operand 599 states and 985 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:16,663 INFO L93 Difference]: Finished difference Result 1203 states and 1989 transitions. [2021-11-12 22:17:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:17:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-12 22:17:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:16,671 INFO L225 Difference]: With dead ends: 1203 [2021-11-12 22:17:16,671 INFO L226 Difference]: Without dead ends: 620 [2021-11-12 22:17:16,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 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 22:17:16,677 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 185 mSDsluCounter, 3752 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 4698 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.32ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:16,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 4698 Invalid, 94 Unknown, 0 Unchecked, 17.32ms Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 151.26ms Time] [2021-11-12 22:17:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-12 22:17:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 612. [2021-11-12 22:17:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 472 states have (on average 1.6588983050847457) internal successors, (783), 494 states have internal predecessors, (783), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-12 22:17:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1004 transitions. [2021-11-12 22:17:16,716 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1004 transitions. Word has length 115 [2021-11-12 22:17:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:16,717 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1004 transitions. [2021-11-12 22:17:16,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1004 transitions. [2021-11-12 22:17:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:17:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:16,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:16,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:16,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:16,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash 954112600, now seen corresponding path program 1 times [2021-11-12 22:17:16,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:16,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684948115] [2021-11-12 22:17:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:16,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:16,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:16,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:17:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:17,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:18,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:18,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684948115] [2021-11-12 22:17:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684948115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:18,322 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:18,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:17:18,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726603419] [2021-11-12 22:17:18,323 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:18,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:17:18,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:17:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:18,325 INFO L87 Difference]: Start difference. First operand 612 states and 1004 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:18,585 INFO L93 Difference]: Finished difference Result 1225 states and 2022 transitions. [2021-11-12 22:17:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:17:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 116 [2021-11-12 22:17:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:18,592 INFO L225 Difference]: With dead ends: 1225 [2021-11-12 22:17:18,592 INFO L226 Difference]: Without dead ends: 629 [2021-11-12 22:17:18,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 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 22:17:18,598 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 103 mSDsluCounter, 5472 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.25ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:18,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 6418 Invalid, 104 Unknown, 0 Unchecked, 13.25ms Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 171.94ms Time] [2021-11-12 22:17:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-12 22:17:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2021-11-12 22:17:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 482 states have (on average 1.6556016597510372) internal successors, (798), 506 states have internal predecessors, (798), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-12 22:17:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1023 transitions. [2021-11-12 22:17:18,643 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1023 transitions. Word has length 116 [2021-11-12 22:17:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1023 transitions. [2021-11-12 22:17:18,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1023 transitions. [2021-11-12 22:17:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:17:18,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:18,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:18,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:18,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:18,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1701773273, now seen corresponding path program 1 times [2021-11-12 22:17:18,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:18,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259809411] [2021-11-12 22:17:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:18,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:18,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:17:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:17:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:19,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:20,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259809411] [2021-11-12 22:17:20,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259809411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:20,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:20,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:17:20,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526164395] [2021-11-12 22:17:20,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:20,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:17:20,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:17:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:20,189 INFO L87 Difference]: Start difference. First operand 625 states and 1023 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:17:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:20,378 INFO L93 Difference]: Finished difference Result 1245 states and 2052 transitions. [2021-11-12 22:17:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:17:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-12 22:17:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:20,386 INFO L225 Difference]: With dead ends: 1245 [2021-11-12 22:17:20,386 INFO L226 Difference]: Without dead ends: 636 [2021-11-12 22:17:20,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 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 22:17:20,392 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 181 mSDsluCounter, 4543 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 5478 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.85ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:20,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 5478 Invalid, 81 Unknown, 0 Unchecked, 10.85ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 120.10ms Time] [2021-11-12 22:17:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-12 22:17:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2021-11-12 22:17:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 490 states have (on average 1.6551020408163266) internal successors, (811), 515 states have internal predecessors, (811), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-12 22:17:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1040 transitions. [2021-11-12 22:17:20,428 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1040 transitions. Word has length 116 [2021-11-12 22:17:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1040 transitions. [2021-11-12 22:17:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:17:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1040 transitions. [2021-11-12 22:17:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:17:20,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:20,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:20,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:20,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:20,655 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2091143144, now seen corresponding path program 1 times [2021-11-12 22:17:20,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:20,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936351696] [2021-11-12 22:17:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:20,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:20,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:20,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:17:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:21,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:22,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:22,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936351696] [2021-11-12 22:17:22,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936351696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:22,064 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:22,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:17:22,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216120103] [2021-11-12 22:17:22,065 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:22,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:17:22,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:17:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:17:22,067 INFO L87 Difference]: Start difference. First operand 634 states and 1040 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:22,407 INFO L93 Difference]: Finished difference Result 1267 states and 2086 transitions. [2021-11-12 22:17:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:17:22,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:17:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:22,417 INFO L225 Difference]: With dead ends: 1267 [2021-11-12 22:17:22,417 INFO L226 Difference]: Without dead ends: 640 [2021-11-12 22:17:22,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 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 22:17:22,427 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 219 mSDsluCounter, 5477 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.80ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:22,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 6402 Invalid, 169 Unknown, 0 Unchecked, 11.80ms Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 221.98ms Time] [2021-11-12 22:17:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-12 22:17:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 630. [2021-11-12 22:17:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 486 states have (on average 1.6440329218106995) internal successors, (799), 511 states have internal predecessors, (799), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-12 22:17:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1028 transitions. [2021-11-12 22:17:22,472 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1028 transitions. Word has length 117 [2021-11-12 22:17:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1028 transitions. [2021-11-12 22:17:22,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1028 transitions. [2021-11-12 22:17:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:17:22,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:22,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:22,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:22,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:22,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash -275249128, now seen corresponding path program 1 times [2021-11-12 22:17:22,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:22,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117035513] [2021-11-12 22:17:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:22,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:22,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:22,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:17:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:17:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:23,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:23,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117035513] [2021-11-12 22:17:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117035513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:23,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:17:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400475242] [2021-11-12 22:17:23,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:23,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:17:23,720 INFO L87 Difference]: Start difference. First operand 630 states and 1028 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:23,777 INFO L93 Difference]: Finished difference Result 1236 states and 2021 transitions. [2021-11-12 22:17:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:17:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-12 22:17:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:23,782 INFO L225 Difference]: With dead ends: 1236 [2021-11-12 22:17:23,783 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:17:23,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 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 22:17:23,788 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 32 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:23,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1867 Invalid, 17 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 16.53ms Time] [2021-11-12 22:17:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:17:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:17:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6295399515738498) internal successors, (673), 429 states have internal predecessors, (673), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:17:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 882 transitions. [2021-11-12 22:17:23,815 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 882 transitions. Word has length 117 [2021-11-12 22:17:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:23,815 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 882 transitions. [2021-11-12 22:17:23,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 882 transitions. [2021-11-12 22:17:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:17:23,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:23,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:23,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:24,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:24,041 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1099068104, now seen corresponding path program 1 times [2021-11-12 22:17:24,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:24,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609202833] [2021-11-12 22:17:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:24,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:24,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:24,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:24,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:17:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:24,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:25,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:25,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609202833] [2021-11-12 22:17:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609202833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:25,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:25,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:17:25,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797587825] [2021-11-12 22:17:25,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:25,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:17:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:17:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:17:25,366 INFO L87 Difference]: Start difference. First operand 544 states and 882 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:25,614 INFO L93 Difference]: Finished difference Result 1075 states and 1752 transitions. [2021-11-12 22:17:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-12 22:17:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:25,622 INFO L225 Difference]: With dead ends: 1075 [2021-11-12 22:17:25,622 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:17:25,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:17:25,628 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 50 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 8606 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:25,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 8606 Invalid, 141 Unknown, 0 Unchecked, 14.00ms Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 150.29ms Time] [2021-11-12 22:17:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:17:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:17:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6271186440677967) internal successors, (672), 429 states have internal predecessors, (672), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:17:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 881 transitions. [2021-11-12 22:17:25,654 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 881 transitions. Word has length 118 [2021-11-12 22:17:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:25,654 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 881 transitions. [2021-11-12 22:17:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 881 transitions. [2021-11-12 22:17:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:17:25,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:25,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:25,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:25,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:25,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1332354413, now seen corresponding path program 1 times [2021-11-12 22:17:25,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:25,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808600420] [2021-11-12 22:17:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:25,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:25,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:17:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:26,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:27,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:27,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808600420] [2021-11-12 22:17:27,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808600420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:27,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:27,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:17:27,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548962748] [2021-11-12 22:17:27,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:27,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:17:27,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:17:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:17:27,188 INFO L87 Difference]: Start difference. First operand 544 states and 881 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:27,384 INFO L93 Difference]: Finished difference Result 1075 states and 1750 transitions. [2021-11-12 22:17:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-12 22:17:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:27,390 INFO L225 Difference]: With dead ends: 1075 [2021-11-12 22:17:27,390 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:17:27,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:17:27,395 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 35 mSDsluCounter, 6875 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 7740 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:27,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 7740 Invalid, 110 Unknown, 0 Unchecked, 10.45ms Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 119.19ms Time] [2021-11-12 22:17:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:17:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:17:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6246973365617434) internal successors, (671), 429 states have internal predecessors, (671), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:17:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 880 transitions. [2021-11-12 22:17:27,419 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 880 transitions. Word has length 119 [2021-11-12 22:17:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 880 transitions. [2021-11-12 22:17:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 880 transitions. [2021-11-12 22:17:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:17:27,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:27,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:27,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:27,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:27,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1940764509, now seen corresponding path program 1 times [2021-11-12 22:17:27,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:27,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878518122] [2021-11-12 22:17:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:27,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:27,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:27,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:17:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:17:28,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:28,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878518122] [2021-11-12 22:17:28,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878518122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:28,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:28,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:17:28,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48346118] [2021-11-12 22:17:28,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:17:28,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:17:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:17:28,929 INFO L87 Difference]: Start difference. First operand 544 states and 880 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:29,108 INFO L93 Difference]: Finished difference Result 1075 states and 1748 transitions. [2021-11-12 22:17:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-12 22:17:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:29,114 INFO L225 Difference]: With dead ends: 1075 [2021-11-12 22:17:29,114 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:17:29,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:17:29,119 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 40 mSDsluCounter, 6877 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7742 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:29,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 7742 Invalid, 110 Unknown, 0 Unchecked, 9.65ms Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 109.30ms Time] [2021-11-12 22:17:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:17:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:17:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6222760290556901) internal successors, (670), 429 states have internal predecessors, (670), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 22:17:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 879 transitions. [2021-11-12 22:17:29,143 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 879 transitions. Word has length 120 [2021-11-12 22:17:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 879 transitions. [2021-11-12 22:17:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:17:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 879 transitions. [2021-11-12 22:17:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:17:29,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:29,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:29,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:29,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:29,368 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1870364402, now seen corresponding path program 1 times [2021-11-12 22:17:29,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:29,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853661256] [2021-11-12 22:17:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:29,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:29,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:29,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:17:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:29,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:17:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:17:30,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:17:30,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853661256] [2021-11-12 22:17:30,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853661256] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:30,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:30,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:17:30,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939679456] [2021-11-12 22:17:30,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:30,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:17:30,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:17:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:30,507 INFO L87 Difference]: Start difference. First operand 544 states and 879 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:17:32,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:33,866 INFO L93 Difference]: Finished difference Result 1554 states and 2534 transitions. [2021-11-12 22:17:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:17:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-12 22:17:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:33,876 INFO L225 Difference]: With dead ends: 1554 [2021-11-12 22:17:33,877 INFO L226 Difference]: Without dead ends: 1028 [2021-11-12 22:17:33,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:17:33,883 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 752 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 161 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3044.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.90ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3224.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:33,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 4111 Invalid, 716 Unknown, 0 Unchecked, 17.90ms Time], IncrementalHoareTripleChecker [161 Valid, 554 Invalid, 1 Unknown, 0 Unchecked, 3224.07ms Time] [2021-11-12 22:17:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-11-12 22:17:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1019. [2021-11-12 22:17:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 776 states have (on average 1.5850515463917525) internal successors, (1230), 806 states have internal predecessors, (1230), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2021-11-12 22:17:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1623 transitions. [2021-11-12 22:17:33,940 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1623 transitions. Word has length 121 [2021-11-12 22:17:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:33,941 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1623 transitions. [2021-11-12 22:17:33,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:17:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1623 transitions. [2021-11-12 22:17:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:17:33,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:33,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 22:17:33,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:34,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:34,169 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -930701968, now seen corresponding path program 1 times [2021-11-12 22:17:34,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:34,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726913226] [2021-11-12 22:17:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:34,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:34,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:34,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:17:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:17:35,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:35,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726913226] [2021-11-12 22:17:35,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726913226] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:17:35,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:17:35,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:17:35,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525268666] [2021-11-12 22:17:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:17:35,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:17:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:17:35,235 INFO L87 Difference]: Start difference. First operand 1019 states and 1623 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:17:37,254 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 22:17:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:38,303 INFO L93 Difference]: Finished difference Result 2559 states and 4141 transitions. [2021-11-12 22:17:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:17:38,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 123 [2021-11-12 22:17:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:38,318 INFO L225 Difference]: With dead ends: 2559 [2021-11-12 22:17:38,318 INFO L226 Difference]: Without dead ends: 1558 [2021-11-12 22:17:38,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:17:38,328 INFO L933 BasicCegarLoop]: 1038 mSDtfsCounter, 861 mSDsluCounter, 3545 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2785.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 4583 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.50ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2906.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:38,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 4583 Invalid, 483 Unknown, 0 Unchecked, 46.50ms Time], IncrementalHoareTripleChecker [134 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 2906.78ms Time] [2021-11-12 22:17:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-11-12 22:17:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1549. [2021-11-12 22:17:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1180 states have (on average 1.5991525423728814) internal successors, (1887), 1225 states have internal predecessors, (1887), 296 states have call successors, (296), 72 states have call predecessors, (296), 72 states have return successors, (318), 289 states have call predecessors, (318), 291 states have call successors, (318) [2021-11-12 22:17:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 2501 transitions. [2021-11-12 22:17:38,407 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 2501 transitions. Word has length 123 [2021-11-12 22:17:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:38,408 INFO L470 AbstractCegarLoop]: Abstraction has 1549 states and 2501 transitions. [2021-11-12 22:17:38,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:17:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 2501 transitions. [2021-11-12 22:17:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:17:38,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:38,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 22:17:38,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:38,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:38,632 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -47328057, now seen corresponding path program 1 times [2021-11-12 22:17:38,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:38,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531313276] [2021-11-12 22:17:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:38,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:38,634 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:38,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:17:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:39,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:39,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:17:39,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:39,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531313276] [2021-11-12 22:17:39,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531313276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:39,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:39,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:17:39,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090876021] [2021-11-12 22:17:39,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:39,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:17:39,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:17:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:17:39,804 INFO L87 Difference]: Start difference. First operand 1549 states and 2501 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:17:41,832 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 22:17:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:44,341 INFO L93 Difference]: Finished difference Result 5526 states and 9377 transitions. [2021-11-12 22:17:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:44,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-12 22:17:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:44,398 INFO L225 Difference]: With dead ends: 5526 [2021-11-12 22:17:44,398 INFO L226 Difference]: Without dead ends: 3995 [2021-11-12 22:17:44,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:44,415 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 1159 mSDsluCounter, 5472 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3959.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 6813 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.37ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4249.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:44,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 6813 Invalid, 1105 Unknown, 0 Unchecked, 28.37ms Time], IncrementalHoareTripleChecker [96 Valid, 1008 Invalid, 1 Unknown, 0 Unchecked, 4249.57ms Time] [2021-11-12 22:17:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-12 22:17:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3044. [2021-11-12 22:17:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2323 states have (on average 1.5949203616013776) internal successors, (3705), 2414 states have internal predecessors, (3705), 572 states have call successors, (572), 141 states have call predecessors, (572), 148 states have return successors, (733), 564 states have call predecessors, (733), 564 states have call successors, (733) [2021-11-12 22:17:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 5010 transitions. [2021-11-12 22:17:44,663 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 5010 transitions. Word has length 126 [2021-11-12 22:17:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 5010 transitions. [2021-11-12 22:17:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:17:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 5010 transitions. [2021-11-12 22:17:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:17:44,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:44,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:44,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:44,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:44,893 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash -823796772, now seen corresponding path program 1 times [2021-11-12 22:17:44,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:44,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186315381] [2021-11-12 22:17:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:44,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:44,895 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:17:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:17:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:17:45,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:17:45,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:45,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186315381] [2021-11-12 22:17:45,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186315381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:45,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:45,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:17:45,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650580644] [2021-11-12 22:17:45,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:45,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:45,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:17:45,911 INFO L87 Difference]: Start difference. First operand 3044 states and 5010 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:46,205 INFO L93 Difference]: Finished difference Result 6088 states and 10148 transitions. [2021-11-12 22:17:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:17:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-12 22:17:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:46,231 INFO L225 Difference]: With dead ends: 6088 [2021-11-12 22:17:46,231 INFO L226 Difference]: Without dead ends: 3062 [2021-11-12 22:17:46,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 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 22:17:46,261 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 19 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:46,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2550 Invalid, 82 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 98.09ms Time] [2021-11-12 22:17:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-11-12 22:17:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3056. [2021-11-12 22:17:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2332 states have (on average 1.5913379073756433) internal successors, (3711), 2423 states have internal predecessors, (3711), 572 states have call successors, (572), 147 states have call predecessors, (572), 151 states have return successors, (717), 561 states have call predecessors, (717), 564 states have call successors, (717) [2021-11-12 22:17:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 5000 transitions. [2021-11-12 22:17:46,440 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 5000 transitions. Word has length 127 [2021-11-12 22:17:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:46,441 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 5000 transitions. [2021-11-12 22:17:46,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:17:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 5000 transitions. [2021-11-12 22:17:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:17:46,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:46,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 22:17:46,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:46,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:46,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash 786959458, now seen corresponding path program 1 times [2021-11-12 22:17:46,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:46,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553656738] [2021-11-12 22:17:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:46,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:46,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:46,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:17:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:17:47,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:17:47,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:47,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553656738] [2021-11-12 22:17:47,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553656738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:47,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:47,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:17:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857879217] [2021-11-12 22:17:47,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:47,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:17:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:17:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:17:47,780 INFO L87 Difference]: Start difference. First operand 3056 states and 5000 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:17:49,799 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 22:17:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:52,006 INFO L93 Difference]: Finished difference Result 10976 states and 19123 transitions. [2021-11-12 22:17:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:52,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-12 22:17:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:52,082 INFO L225 Difference]: With dead ends: 10976 [2021-11-12 22:17:52,083 INFO L226 Difference]: Without dead ends: 7938 [2021-11-12 22:17:52,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:17:52,102 INFO L933 BasicCegarLoop]: 1323 mSDtfsCounter, 1144 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3569.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 6539 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.32ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3818.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:52,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 6539 Invalid, 1044 Unknown, 0 Unchecked, 21.32ms Time], IncrementalHoareTripleChecker [93 Valid, 950 Invalid, 1 Unknown, 0 Unchecked, 3818.58ms Time] [2021-11-12 22:17:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2021-11-12 22:17:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 6088. [2021-11-12 22:17:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 4648 states have (on average 1.5867039586919105) internal successors, (7375), 4834 states have internal predecessors, (7375), 1127 states have call successors, (1127), 291 states have call predecessors, (1127), 312 states have return successors, (1684), 1114 states have call predecessors, (1684), 1113 states have call successors, (1684) [2021-11-12 22:17:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 10186 transitions. [2021-11-12 22:17:52,607 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 10186 transitions. Word has length 135 [2021-11-12 22:17:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:52,607 INFO L470 AbstractCegarLoop]: Abstraction has 6088 states and 10186 transitions. [2021-11-12 22:17:52,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:17:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 10186 transitions. [2021-11-12 22:17:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:17:52,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:52,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:52,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:52,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash 469307881, now seen corresponding path program 1 times [2021-11-12 22:17:52,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:52,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433534493] [2021-11-12 22:17:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:52,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:52,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:52,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:17:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:17:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:17:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:53,751 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 22:17:53,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433534493] [2021-11-12 22:17:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433534493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:53,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:53,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:17:53,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872794432] [2021-11-12 22:17:53,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:17:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:17:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:17:53,754 INFO L87 Difference]: Start difference. First operand 6088 states and 10186 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:17:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:54,196 INFO L93 Difference]: Finished difference Result 12230 states and 20799 transitions. [2021-11-12 22:17:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:17:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-12 22:17:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:54,267 INFO L225 Difference]: With dead ends: 12230 [2021-11-12 22:17:54,268 INFO L226 Difference]: Without dead ends: 6160 [2021-11-12 22:17:54,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 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 22:17:54,307 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 21 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:54,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3393 Invalid, 86 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 87.97ms Time] [2021-11-12 22:17:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-11-12 22:17:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 6148. [2021-11-12 22:17:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 4702 states have (on average 1.5812420246703531) internal successors, (7435), 4876 states have internal predecessors, (7435), 1127 states have call successors, (1127), 315 states have call predecessors, (1127), 318 states have return successors, (1660), 1108 states have call predecessors, (1660), 1113 states have call successors, (1660) [2021-11-12 22:17:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 10222 transitions. [2021-11-12 22:17:54,685 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 10222 transitions. Word has length 136 [2021-11-12 22:17:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:54,686 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 10222 transitions. [2021-11-12 22:17:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:17:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 10222 transitions. [2021-11-12 22:17:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:17:54,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:54,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-12 22:17:54,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:54,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:54,910 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -215584710, now seen corresponding path program 1 times [2021-11-12 22:17:54,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:54,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027436188] [2021-11-12 22:17:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:54,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:54,913 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:54,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:17:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:17:55,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:17:56,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:56,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027436188] [2021-11-12 22:17:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027436188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:56,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:56,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:17:56,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938800881] [2021-11-12 22:17:56,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:56,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:17:56,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:17:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:17:56,233 INFO L87 Difference]: Start difference. First operand 6148 states and 10222 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:17:58,263 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 22:18:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:00,876 INFO L93 Difference]: Finished difference Result 22066 states and 39954 transitions. [2021-11-12 22:18:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:18:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-12 22:18:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:00,982 INFO L225 Difference]: With dead ends: 22066 [2021-11-12 22:18:00,983 INFO L226 Difference]: Without dead ends: 15936 [2021-11-12 22:18:01,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:01,034 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 1122 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3530.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 6535 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.92ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3780.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:01,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 6535 Invalid, 1029 Unknown, 0 Unchecked, 17.92ms Time], IncrementalHoareTripleChecker [89 Valid, 939 Invalid, 1 Unknown, 0 Unchecked, 3780.83ms Time] [2021-11-12 22:18:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2021-11-12 22:18:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 12320. [2021-11-12 22:18:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12320 states, 9421 states have (on average 1.5764780808831333) internal successors, (14852), 9779 states have internal predecessors, (14852), 2240 states have call successors, (2240), 627 states have call predecessors, (2240), 658 states have return successors, (4025), 2217 states have call predecessors, (4025), 2214 states have call successors, (4025) [2021-11-12 22:18:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12320 states to 12320 states and 21117 transitions. [2021-11-12 22:18:02,110 INFO L78 Accepts]: Start accepts. Automaton has 12320 states and 21117 transitions. Word has length 145 [2021-11-12 22:18:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:02,111 INFO L470 AbstractCegarLoop]: Abstraction has 12320 states and 21117 transitions. [2021-11-12 22:18:02,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:18:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 12320 states and 21117 transitions. [2021-11-12 22:18:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:18:02,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:02,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-12 22:18:02,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:02,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:02,395 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 655205209, now seen corresponding path program 1 times [2021-11-12 22:18:02,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:02,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929629232] [2021-11-12 22:18:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:02,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:02,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:02,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:18:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:18:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:18:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:18:03,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929629232] [2021-11-12 22:18:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929629232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:03,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:03,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:18:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042177802] [2021-11-12 22:18:03,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:03,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:18:03,350 INFO L87 Difference]: Start difference. First operand 12320 states and 21117 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:18:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:04,131 INFO L93 Difference]: Finished difference Result 24766 states and 43519 transitions. [2021-11-12 22:18:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:18:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-12 22:18:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:04,215 INFO L225 Difference]: With dead ends: 24766 [2021-11-12 22:18:04,215 INFO L226 Difference]: Without dead ends: 12464 [2021-11-12 22:18:04,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 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 22:18:04,366 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 21 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:04,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3393 Invalid, 88 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 74.77ms Time] [2021-11-12 22:18:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12464 states. [2021-11-12 22:18:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12464 to 12440. [2021-11-12 22:18:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12440 states, 9529 states have (on average 1.5712036939867773) internal successors, (14972), 9887 states have internal predecessors, (14972), 2240 states have call successors, (2240), 651 states have call predecessors, (2240), 670 states have return successors, (3993), 2205 states have call predecessors, (3993), 2214 states have call successors, (3993) [2021-11-12 22:18:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12440 states to 12440 states and 21205 transitions. [2021-11-12 22:18:05,226 INFO L78 Accepts]: Start accepts. Automaton has 12440 states and 21205 transitions. Word has length 146 [2021-11-12 22:18:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:05,227 INFO L470 AbstractCegarLoop]: Abstraction has 12440 states and 21205 transitions. [2021-11-12 22:18:05,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:18:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12440 states and 21205 transitions. [2021-11-12 22:18:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:18:05,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:05,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:18:05,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:05,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:05,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:05,443 INFO L85 PathProgramCache]: Analyzing trace with hash -557230577, now seen corresponding path program 1 times [2021-11-12 22:18:05,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:05,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125428998] [2021-11-12 22:18:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:05,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:05,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:05,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:18:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:05,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:18:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:18:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:18:06,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125428998] [2021-11-12 22:18:06,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125428998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:06,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:06,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:18:06,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392870490] [2021-11-12 22:18:06,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:06,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:18:06,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:18:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:18:06,622 INFO L87 Difference]: Start difference. First operand 12440 states and 21205 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:18:08,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:10,659 WARN L515 Checker$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 22:18:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:13,745 INFO L93 Difference]: Finished difference Result 44494 states and 85704 transitions. [2021-11-12 22:18:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:18:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-12 22:18:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:14,041 INFO L225 Difference]: With dead ends: 44494 [2021-11-12 22:18:14,041 INFO L226 Difference]: Without dead ends: 32072 [2021-11-12 22:18:14,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:14,502 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 1181 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 146 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4985.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.07ms SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5158.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:14,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 5220 Invalid, 647 Unknown, 0 Unchecked, 13.07ms Time], IncrementalHoareTripleChecker [146 Valid, 499 Invalid, 2 Unknown, 0 Unchecked, 5158.62ms Time] [2021-11-12 22:18:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2021-11-12 22:18:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 24988. [2021-11-12 22:18:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24988 states, 19132 states have (on average 1.5664332009199247) internal successors, (29969), 19870 states have internal predecessors, (29969), 4469 states have call successors, (4469), 1299 states have call predecessors, (4469), 1386 states have return successors, (10182), 4426 states have call predecessors, (10182), 4419 states have call successors, (10182) [2021-11-12 22:18:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24988 states to 24988 states and 44620 transitions. [2021-11-12 22:18:17,102 INFO L78 Accepts]: Start accepts. Automaton has 24988 states and 44620 transitions. Word has length 156 [2021-11-12 22:18:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 24988 states and 44620 transitions. [2021-11-12 22:18:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:18:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24988 states and 44620 transitions. [2021-11-12 22:18:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:18:17,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:17,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:18:17,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:17,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:17,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash -447100804, now seen corresponding path program 1 times [2021-11-12 22:18:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:17,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076291899] [2021-11-12 22:18:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:17,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:17,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:17,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:17,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:18:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:18:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:18:18,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:18:18,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:18,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076291899] [2021-11-12 22:18:18,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076291899] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:18:18,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:18:18,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:18:18,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794888232] [2021-11-12 22:18:18,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:18,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:18,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:18,654 INFO L87 Difference]: Start difference. First operand 24988 states and 44620 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:20,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:22,681 WARN L515 Checker$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 22:18:25,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:25,400 INFO L93 Difference]: Finished difference Result 50150 states and 94296 transitions. [2021-11-12 22:18:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:18:25,401 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-12 22:18:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:25,572 INFO L225 Difference]: With dead ends: 50150 [2021-11-12 22:18:25,572 INFO L226 Difference]: Without dead ends: 25180 [2021-11-12 22:18:26,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 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 22:18:26,114 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 771 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4684.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4799.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:26,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 2158 Invalid, 481 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [16 Valid, 463 Invalid, 2 Unknown, 0 Unchecked, 4799.68ms Time] [2021-11-12 22:18:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25180 states. [2021-11-12 22:18:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25180 to 25180. [2021-11-12 22:18:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25180 states, 19276 states have (on average 1.5622017015978418) internal successors, (30113), 20014 states have internal predecessors, (30113), 4469 states have call successors, (4469), 1347 states have call predecessors, (4469), 1434 states have return successors, (10230), 4426 states have call predecessors, (10230), 4419 states have call successors, (10230) [2021-11-12 22:18:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25180 states to 25180 states and 44812 transitions. [2021-11-12 22:18:28,090 INFO L78 Accepts]: Start accepts. Automaton has 25180 states and 44812 transitions. Word has length 157 [2021-11-12 22:18:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:28,091 INFO L470 AbstractCegarLoop]: Abstraction has 25180 states and 44812 transitions. [2021-11-12 22:18:28,091 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25180 states and 44812 transitions. [2021-11-12 22:18:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 22:18:28,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:28,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:18:28,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:28,315 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash 771642206, now seen corresponding path program 1 times [2021-11-12 22:18:28,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:28,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802559617] [2021-11-12 22:18:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:28,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:28,318 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:28,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:18:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:28,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:18:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:18:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:18:29,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:29,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802559617] [2021-11-12 22:18:29,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802559617] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:18:29,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:18:29,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:18:29,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813818267] [2021-11-12 22:18:29,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:29,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:29,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:29,654 INFO L87 Difference]: Start difference. First operand 25180 states and 44812 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:31,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:33,681 WARN L515 Checker$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 22:18:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:36,274 INFO L93 Difference]: Finished difference Result 50582 states and 94648 transitions. [2021-11-12 22:18:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:18:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-12 22:18:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:36,656 INFO L225 Difference]: With dead ends: 50582 [2021-11-12 22:18:36,656 INFO L226 Difference]: Without dead ends: 25420 [2021-11-12 22:18:37,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 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 22:18:37,020 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 781 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4634.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4748.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:37,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2159 Invalid, 483 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 2 Unknown, 0 Unchecked, 4748.60ms Time] [2021-11-12 22:18:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-11-12 22:18:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25420. [2021-11-12 22:18:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25420 states, 19468 states have (on average 1.5566570782823095) internal successors, (30305), 20206 states have internal predecessors, (30305), 4469 states have call successors, (4469), 1395 states have call predecessors, (4469), 1482 states have return successors, (10278), 4426 states have call predecessors, (10278), 4419 states have call successors, (10278) [2021-11-12 22:18:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25420 states to 25420 states and 45052 transitions. [2021-11-12 22:18:38,770 INFO L78 Accepts]: Start accepts. Automaton has 25420 states and 45052 transitions. Word has length 159 [2021-11-12 22:18:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:38,773 INFO L470 AbstractCegarLoop]: Abstraction has 25420 states and 45052 transitions. [2021-11-12 22:18:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 25420 states and 45052 transitions. [2021-11-12 22:18:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:18:38,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:38,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:18:38,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-12 22:18:38,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:38,991 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash 613912636, now seen corresponding path program 1 times [2021-11-12 22:18:38,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:38,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049425967] [2021-11-12 22:18:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:38,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:38,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:38,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:18:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:18:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:18:39,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:18:40,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:40,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049425967] [2021-11-12 22:18:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049425967] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:18:40,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:18:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:18:40,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162473443] [2021-11-12 22:18:40,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:40,272 INFO L87 Difference]: Start difference. First operand 25420 states and 45052 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:42,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:44,300 WARN L515 Checker$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 22:18:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:47,046 INFO L93 Difference]: Finished difference Result 51110 states and 95120 transitions. [2021-11-12 22:18:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:18:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-12 22:18:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:47,227 INFO L225 Difference]: With dead ends: 51110 [2021-11-12 22:18:47,228 INFO L226 Difference]: Without dead ends: 25708 [2021-11-12 22:18:47,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 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 22:18:47,747 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 775 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4699.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.73ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4825.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:47,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2159 Invalid, 482 Unknown, 0 Unchecked, 6.73ms Time], IncrementalHoareTripleChecker [12 Valid, 468 Invalid, 2 Unknown, 0 Unchecked, 4825.14ms Time] [2021-11-12 22:18:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-11-12 22:18:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2021-11-12 22:18:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 19708 states have (on average 1.5498782220418104) internal successors, (30545), 20446 states have internal predecessors, (30545), 4469 states have call successors, (4469), 1443 states have call predecessors, (4469), 1530 states have return successors, (10326), 4426 states have call predecessors, (10326), 4419 states have call successors, (10326) [2021-11-12 22:18:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 45340 transitions. [2021-11-12 22:18:49,298 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 45340 transitions. Word has length 161 [2021-11-12 22:18:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:49,299 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 45340 transitions. [2021-11-12 22:18:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 45340 transitions. [2021-11-12 22:18:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:18:49,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:49,303 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:18:49,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:18:49,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:49,515 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash 723493910, now seen corresponding path program 1 times [2021-11-12 22:18:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:49,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244030331] [2021-11-12 22:18:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:49,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:49,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:49,517 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:49,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:18:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:18:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:18:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:18:51,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:51,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244030331] [2021-11-12 22:18:51,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244030331] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:18:51,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:18:51,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:18:51,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578097875] [2021-11-12 22:18:51,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:51,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:18:51,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:18:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:18:51,080 INFO L87 Difference]: Start difference. First operand 25708 states and 45340 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:18:53,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:55,116 WARN L515 Checker$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 22:18:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:57,912 INFO L93 Difference]: Finished difference Result 51734 states and 95700 transitions. [2021-11-12 22:18:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:18:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-12 22:18:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:58,111 INFO L225 Difference]: With dead ends: 51734 [2021-11-12 22:18:58,111 INFO L226 Difference]: Without dead ends: 26044 [2021-11-12 22:18:58,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 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 22:18:58,482 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 784 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4698.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4821.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:58,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 2159 Invalid, 481 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [10 Valid, 469 Invalid, 2 Unknown, 0 Unchecked, 4821.34ms Time] [2021-11-12 22:18:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26044 states. [2021-11-12 22:18:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26044 to 26044. [2021-11-12 22:18:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26044 states, 19996 states have (on average 1.5419583916783357) internal successors, (30833), 20734 states have internal predecessors, (30833), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (10374), 4426 states have call predecessors, (10374), 4419 states have call successors, (10374) [2021-11-12 22:19:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26044 states to 26044 states and 45676 transitions. [2021-11-12 22:19:00,242 INFO L78 Accepts]: Start accepts. Automaton has 26044 states and 45676 transitions. Word has length 163 [2021-11-12 22:19:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:00,243 INFO L470 AbstractCegarLoop]: Abstraction has 26044 states and 45676 transitions. [2021-11-12 22:19:00,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:19:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26044 states and 45676 transitions. [2021-11-12 22:19:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:19:00,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:00,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-12 22:19:00,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:00,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:00,447 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2101601788, now seen corresponding path program 1 times [2021-11-12 22:19:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:00,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634964509] [2021-11-12 22:19:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:00,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:00,449 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:00,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:19:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:19:01,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:19:02,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634964509] [2021-11-12 22:19:02,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634964509] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:02,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:02,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-12 22:19:02,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847991503] [2021-11-12 22:19:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:02,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:02,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:19:02,230 INFO L87 Difference]: Start difference. First operand 26044 states and 45676 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:19:04,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:19:06,256 WARN L515 Checker$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 22:19:08,263 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 22:19:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:14,223 INFO L93 Difference]: Finished difference Result 58430 states and 109354 transitions. [2021-11-12 22:19:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-12 22:19:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:14,507 INFO L225 Difference]: With dead ends: 58430 [2021-11-12 22:19:14,507 INFO L226 Difference]: Without dead ends: 32404 [2021-11-12 22:19:14,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:19:14,752 INFO L933 BasicCegarLoop]: 1081 mSDtfsCounter, 1824 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 110 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8919.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.87ms SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9344.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:14,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 3861 Invalid, 2149 Unknown, 0 Unchecked, 16.87ms Time], IncrementalHoareTripleChecker [110 Valid, 2036 Invalid, 3 Unknown, 0 Unchecked, 9344.50ms Time] [2021-11-12 22:19:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32404 states. [2021-11-12 22:19:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32404 to 26044. [2021-11-12 22:19:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26044 states, 19996 states have (on average 1.5411582316463293) internal successors, (30817), 20734 states have internal predecessors, (30817), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (10374), 4426 states have call predecessors, (10374), 4419 states have call successors, (10374) [2021-11-12 22:19:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26044 states to 26044 states and 45660 transitions. [2021-11-12 22:19:16,657 INFO L78 Accepts]: Start accepts. Automaton has 26044 states and 45660 transitions. Word has length 165 [2021-11-12 22:19:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 26044 states and 45660 transitions. [2021-11-12 22:19:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:19:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26044 states and 45660 transitions. [2021-11-12 22:19:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:19:16,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:16,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1] [2021-11-12 22:19:16,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:16,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,860 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash 667496676, now seen corresponding path program 1 times [2021-11-12 22:19:16,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:16,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140972564] [2021-11-12 22:19:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:16,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:16,862 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:16,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:19:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:19:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:19:17,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:19:18,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:18,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140972564] [2021-11-12 22:19:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140972564] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:18,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:18,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-12 22:19:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950294892] [2021-11-12 22:19:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:18,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:18,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:19:18,369 INFO L87 Difference]: Start difference. First operand 26044 states and 45660 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:19:20,389 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 22:19:22,394 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 22:19:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:28,374 INFO L93 Difference]: Finished difference Result 88038 states and 170206 transitions. [2021-11-12 22:19:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-12 22:19:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:28,918 INFO L225 Difference]: With dead ends: 88038 [2021-11-12 22:19:28,918 INFO L226 Difference]: Without dead ends: 62012 [2021-11-12 22:19:29,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:29,531 INFO L933 BasicCegarLoop]: 1343 mSDtfsCounter, 1000 mSDsluCounter, 6065 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 85 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5337.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 7408 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.75ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5537.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:29,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 7408 Invalid, 1123 Unknown, 0 Unchecked, 17.75ms Time], IncrementalHoareTripleChecker [85 Valid, 1036 Invalid, 2 Unknown, 0 Unchecked, 5537.94ms Time] [2021-11-12 22:19:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62012 states. [2021-11-12 22:19:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62012 to 59652. [2021-11-12 22:19:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59652 states, 43772 states have (on average 1.5313442383258704) internal successors, (67030), 46110 states have internal predecessors, (67030), 12581 states have call successors, (12581), 2979 states have call predecessors, (12581), 3298 states have return successors, (33259), 12594 states have call predecessors, (33259), 12483 states have call successors, (33259) [2021-11-12 22:19:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59652 states to 59652 states and 112870 transitions. [2021-11-12 22:19:35,017 INFO L78 Accepts]: Start accepts. Automaton has 59652 states and 112870 transitions. Word has length 171 [2021-11-12 22:19:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:35,017 INFO L470 AbstractCegarLoop]: Abstraction has 59652 states and 112870 transitions. [2021-11-12 22:19:35,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:19:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 59652 states and 112870 transitions. [2021-11-12 22:19:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:19:35,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:35,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-12 22:19:35,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:35,222 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 59419813, now seen corresponding path program 1 times [2021-11-12 22:19:35,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:35,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812730878] [2021-11-12 22:19:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:35,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:35,224 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:35,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21f1909d-6bca-403f-af7b-07e8a99e1bf6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:19:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:19:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:19:36,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:19:36,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:36,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812730878] [2021-11-12 22:19:36,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812730878] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:36,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:36,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 22:19:36,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769925378] [2021-11-12 22:19:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:36,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:36,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:36,782 INFO L87 Difference]: Start difference. First operand 59652 states and 112870 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:19:38,808 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 22:19:40,814 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 []