./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.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_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/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_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/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_21a66985-c7d9-405d-aeb0-4d25d51f0390/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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:45,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:45,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:45,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:45,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:45,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:45,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:45,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:45,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:45,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:45,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:45,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:45,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:45,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:45,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:45,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:45,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:45,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:45,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:45,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:45,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:45,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:45,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:45,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:45,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:45,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:45,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:45,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:45,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:45,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:45,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:45,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:45,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:45,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:45,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:45,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:45,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:45,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:45,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:45,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:45,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:45,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:37:45,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:45,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:45,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:45,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:45,332 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:45,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:45,332 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:45,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:37:45,333 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:45,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:45,334 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:37:45,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:37:45,334 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:45,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:37:45,335 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:37:45,335 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:37:45,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:45,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:45,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:37:45,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:45,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:45,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:45,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:45,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:45,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:45,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:45,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:45,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:45,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:45,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:45,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:45,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:45,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:45,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:45,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:45,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:37:45,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:37:45,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:45,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:45,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:45,344 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2021-11-13 02:37:45,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:45,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:45,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:45,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:45,746 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:45,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-13 02:37:45,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/29ccb3bec/aa4c3a87372f461b9db7d7672f1d1108/FLAG961aaf337 [2021-11-13 02:37:46,733 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:46,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-13 02:37:46,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/29ccb3bec/aa4c3a87372f461b9db7d7672f1d1108/FLAG961aaf337 [2021-11-13 02:37:46,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/29ccb3bec/aa4c3a87372f461b9db7d7672f1d1108 [2021-11-13 02:37:46,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:46,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:46,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:46,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:46,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:46,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:46" (1/1) ... [2021-11-13 02:37:46,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692daa3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:46, skipping insertion in model container [2021-11-13 02:37:46,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:46" (1/1) ... [2021-11-13 02:37:46,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:46,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:47,638 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-13 02:37:47,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:47,748 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:37:47,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a22ca49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:47, skipping insertion in model container [2021-11-13 02:37:47,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:47,750 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:37:47,753 INFO L158 Benchmark]: Toolchain (without parser) took 901.18ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 48.4MB in the beginning and 75.9MB in the end (delta: -27.5MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-13 02:37:47,754 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:37:47,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 897.14ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 48.2MB in the beginning and 75.9MB in the end (delta: -27.7MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-13 02:37:47,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 897.14ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 48.2MB in the beginning and 75.9MB in the end (delta: -27.7MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3094]: 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/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_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/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_21a66985-c7d9-405d-aeb0-4d25d51f0390/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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:50,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:50,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:50,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:50,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:50,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:50,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:50,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:50,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:50,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:50,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:50,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:50,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:50,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:50,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:50,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:50,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:50,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:50,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:50,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:50,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:50,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:50,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:50,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:50,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:50,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:50,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:50,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:50,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:50,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:50,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:50,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:50,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:50,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:50,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:50,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:50,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:50,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:50,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:50,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:50,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:50,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:37:50,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:50,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:50,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:50,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:50,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:50,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:50,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:50,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:50,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:50,883 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:50,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:50,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:50,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:50,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:50,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:50,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:50,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:50,888 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:50,889 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:37:50,889 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:37:50,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:50,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:50,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:50,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:50,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:50,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:37:50,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:50,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:50,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:50,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:50,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:50,892 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:37:50,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:50,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:50,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:50,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:50,894 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2021-11-13 02:37:51,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:51,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:51,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:51,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:51,396 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:51,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-13 02:37:51,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/7c0c06593/b0caad4c0315412d855745acd1fadcef/FLAGb91386734 [2021-11-13 02:37:52,439 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:52,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-13 02:37:52,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/7c0c06593/b0caad4c0315412d855745acd1fadcef/FLAGb91386734 [2021-11-13 02:37:52,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/data/7c0c06593/b0caad4c0315412d855745acd1fadcef [2021-11-13 02:37:52,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:52,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:52,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:52,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:52,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:52,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:52" (1/1) ... [2021-11-13 02:37:52,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67140239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:52, skipping insertion in model container [2021-11-13 02:37:52,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:52" (1/1) ... [2021-11-13 02:37:52,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:52,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:53,263 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-13 02:37:53,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:53,383 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:37:53,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:53,536 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-13 02:37:53,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:53,556 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:37:53,639 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_21a66985-c7d9-405d-aeb0-4d25d51f0390/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-13 02:37:53,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:53,736 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:37:53,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53 WrapperNode [2021-11-13 02:37:53,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:53,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:53,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:37:53,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:37:53,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:53,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:37:53,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:37:53,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:37:53,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:53,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:54,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:54,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:37:54,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:37:54,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:37:54,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:37:54,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (1/1) ... [2021-11-13 02:37:54,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:54,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:37:54,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:37:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 02:37:54,149 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 02:37:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:37:54,150 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:37:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 02:37:54,150 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 02:37:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:37:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-13 02:37:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-13 02:37:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:37:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:37:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-13 02:37:54,152 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-13 02:37:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:37:54,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:37:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:37:54,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:37:54,152 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:37:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:37:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:37:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:37:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 02:37:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 02:37:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 02:37:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 02:37:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:37:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:37:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:37:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:37:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:37:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:37:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:37:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:37:54,156 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:37:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:37:54,156 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:37:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:37:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:37:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:37:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:37:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:37:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:37:54,158 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:37:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:37:54,158 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:37:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:37:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:37:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:37:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:37:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:37:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:37:54,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:37:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:37:54,163 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:37:58,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:37:58,561 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:37:58,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:58 BoogieIcfgContainer [2021-11-13 02:37:58,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:37:58,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:37:58,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:37:58,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:37:58,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:37:52" (1/3) ... [2021-11-13 02:37:58,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@934c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:58, skipping insertion in model container [2021-11-13 02:37:58,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:53" (2/3) ... [2021-11-13 02:37:58,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@934c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:58, skipping insertion in model container [2021-11-13 02:37:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:58" (3/3) ... [2021-11-13 02:37:58,578 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product19.cil.c [2021-11-13 02:37:58,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:37:58,585 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:37:58,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:37:58,687 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:37:58,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:37:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 441 states have (on average 1.6848072562358276) internal successors, (743), 462 states have internal predecessors, (743), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 02:37:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:37:58,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:58,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:58,814 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1483608375, now seen corresponding path program 1 times [2021-11-13 02:37:58,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:58,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336797937] [2021-11-13 02:37:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:58,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:58,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:58,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:37:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:37:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 02:38:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 02:38:00,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:00,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336797937] [2021-11-13 02:38:00,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336797937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:00,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:00,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:38:00,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615736780] [2021-11-13 02:38:00,804 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:00,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:38:00,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:38:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:38:00,849 INFO L87 Difference]: Start difference. First operand has 567 states, 441 states have (on average 1.6848072562358276) internal successors, (743), 462 states have internal predecessors, (743), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:38:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:00,939 INFO L93 Difference]: Finished difference Result 588 states and 971 transitions. [2021-11-13 02:38:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:38:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-13 02:38:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:00,991 INFO L225 Difference]: With dead ends: 588 [2021-11-13 02:38:00,992 INFO L226 Difference]: Without dead ends: 559 [2021-11-13 02:38:01,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:38:01,008 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:01,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 9.09ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:38:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-13 02:38:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-13 02:38:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 435 states have (on average 1.6827586206896552) internal successors, (732), 454 states have internal predecessors, (732), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 925 transitions. [2021-11-13 02:38:01,150 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 925 transitions. Word has length 125 [2021-11-13 02:38:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 925 transitions. [2021-11-13 02:38:01,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:38:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 925 transitions. [2021-11-13 02:38:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:38:01,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:01,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:01,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 02:38:01,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:01,387 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1848803770, now seen corresponding path program 1 times [2021-11-13 02:38:01,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:01,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847462298] [2021-11-13 02:38:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:01,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:01,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:38:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:03,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847462298] [2021-11-13 02:38:03,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847462298] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:03,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:03,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:03,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621604880] [2021-11-13 02:38:03,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:03,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:03,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:03,193 INFO L87 Difference]: Start difference. First operand 559 states and 925 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:03,388 INFO L93 Difference]: Finished difference Result 1109 states and 1842 transitions. [2021-11-13 02:38:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:03,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-13 02:38:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:03,401 INFO L225 Difference]: With dead ends: 1109 [2021-11-13 02:38:03,402 INFO L226 Difference]: Without dead ends: 559 [2021-11-13 02:38:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:03,416 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 14 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:03,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2726 Invalid, 35 Unknown, 0 Unchecked, 28.11ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 49.44ms Time] [2021-11-13 02:38:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-13 02:38:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-13 02:38:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 435 states have (on average 1.6804597701149426) internal successors, (731), 454 states have internal predecessors, (731), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 924 transitions. [2021-11-13 02:38:03,499 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 924 transitions. Word has length 127 [2021-11-13 02:38:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:03,501 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 924 transitions. [2021-11-13 02:38:03,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 924 transitions. [2021-11-13 02:38:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:38:03,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:03,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:03,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:03,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:03,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash -452485452, now seen corresponding path program 1 times [2021-11-13 02:38:03,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:03,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976772907] [2021-11-13 02:38:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:03,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:03,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:03,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:38:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:04,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:05,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:05,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976772907] [2021-11-13 02:38:05,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976772907] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:05,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:05,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:05,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874859909] [2021-11-13 02:38:05,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:05,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:05,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:05,465 INFO L87 Difference]: Start difference. First operand 559 states and 924 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:05,597 INFO L93 Difference]: Finished difference Result 1109 states and 1840 transitions. [2021-11-13 02:38:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-13 02:38:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:05,607 INFO L225 Difference]: With dead ends: 1109 [2021-11-13 02:38:05,607 INFO L226 Difference]: Without dead ends: 559 [2021-11-13 02:38:05,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:05,613 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 12 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:05,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2726 Invalid, 33 Unknown, 0 Unchecked, 17.60ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 50.49ms Time] [2021-11-13 02:38:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-13 02:38:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-13 02:38:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 435 states have (on average 1.6781609195402298) internal successors, (730), 454 states have internal predecessors, (730), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 923 transitions. [2021-11-13 02:38:05,657 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 923 transitions. Word has length 129 [2021-11-13 02:38:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:05,658 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 923 transitions. [2021-11-13 02:38:05,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 923 transitions. [2021-11-13 02:38:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:38:05,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:05,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:05,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:05,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:05,877 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1348267066, now seen corresponding path program 1 times [2021-11-13 02:38:05,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:05,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843402296] [2021-11-13 02:38:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:05,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:05,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:38:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:07,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:07,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:07,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843402296] [2021-11-13 02:38:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843402296] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:07,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:07,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:07,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92114899] [2021-11-13 02:38:07,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:07,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:07,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:07,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:07,567 INFO L87 Difference]: Start difference. First operand 559 states and 923 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:07,682 INFO L93 Difference]: Finished difference Result 1113 states and 1843 transitions. [2021-11-13 02:38:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:38:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-13 02:38:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:07,690 INFO L225 Difference]: With dead ends: 1113 [2021-11-13 02:38:07,691 INFO L226 Difference]: Without dead ends: 565 [2021-11-13 02:38:07,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:07,696 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 13 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:07,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2726 Invalid, 35 Unknown, 0 Unchecked, 9.31ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 49.65ms Time] [2021-11-13 02:38:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-13 02:38:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-13 02:38:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 440 states have (on average 1.6704545454545454) internal successors, (735), 459 states have internal predecessors, (735), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 928 transitions. [2021-11-13 02:38:07,734 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 928 transitions. Word has length 131 [2021-11-13 02:38:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:07,735 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 928 transitions. [2021-11-13 02:38:07,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 928 transitions. [2021-11-13 02:38:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:38:07,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:07,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:07,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:07,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:07,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1765631875, now seen corresponding path program 1 times [2021-11-13 02:38:07,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:07,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59838340] [2021-11-13 02:38:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:07,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:07,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:08,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:38:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:09,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:09,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59838340] [2021-11-13 02:38:09,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59838340] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:09,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:09,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:09,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56978406] [2021-11-13 02:38:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:09,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:09,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:09,520 INFO L87 Difference]: Start difference. First operand 565 states and 928 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:09,629 INFO L93 Difference]: Finished difference Result 1112 states and 1834 transitions. [2021-11-13 02:38:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-13 02:38:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:09,638 INFO L225 Difference]: With dead ends: 1112 [2021-11-13 02:38:09,638 INFO L226 Difference]: Without dead ends: 565 [2021-11-13 02:38:09,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:09,644 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 8 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:09,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2727 Invalid, 30 Unknown, 0 Unchecked, 9.20ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 45.73ms Time] [2021-11-13 02:38:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-13 02:38:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-13 02:38:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 440 states have (on average 1.6681818181818182) internal successors, (734), 459 states have internal predecessors, (734), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 927 transitions. [2021-11-13 02:38:09,680 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 927 transitions. Word has length 132 [2021-11-13 02:38:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:09,681 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 927 transitions. [2021-11-13 02:38:09,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 927 transitions. [2021-11-13 02:38:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 02:38:09,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:09,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:09,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:09,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:09,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 363213162, now seen corresponding path program 1 times [2021-11-13 02:38:09,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:09,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4433965] [2021-11-13 02:38:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:09,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:09,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:38:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:10,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:11,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:11,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4433965] [2021-11-13 02:38:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4433965] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:11,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141697659] [2021-11-13 02:38:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:11,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:11,486 INFO L87 Difference]: Start difference. First operand 565 states and 927 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:11,593 INFO L93 Difference]: Finished difference Result 1112 states and 1833 transitions. [2021-11-13 02:38:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:11,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-13 02:38:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:11,635 INFO L225 Difference]: With dead ends: 1112 [2021-11-13 02:38:11,635 INFO L226 Difference]: Without dead ends: 565 [2021-11-13 02:38:11,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:11,647 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 6 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:11,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2727 Invalid, 28 Unknown, 0 Unchecked, 8.77ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 46.14ms Time] [2021-11-13 02:38:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-13 02:38:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-13 02:38:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 440 states have (on average 1.665909090909091) internal successors, (733), 459 states have internal predecessors, (733), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 926 transitions. [2021-11-13 02:38:11,701 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 926 transitions. Word has length 133 [2021-11-13 02:38:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:11,701 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 926 transitions. [2021-11-13 02:38:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 926 transitions. [2021-11-13 02:38:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:38:11,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:11,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:11,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:11,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:11,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 688867943, now seen corresponding path program 1 times [2021-11-13 02:38:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:11,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752792819] [2021-11-13 02:38:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:11,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:11,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:11,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:38:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:38:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:13,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:13,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:13,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752792819] [2021-11-13 02:38:13,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752792819] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:13,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:13,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 02:38:13,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235507606] [2021-11-13 02:38:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:38:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:38:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:13,743 INFO L87 Difference]: Start difference. First operand 565 states and 926 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:14,044 INFO L93 Difference]: Finished difference Result 1129 states and 1861 transitions. [2021-11-13 02:38:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-13 02:38:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:14,059 INFO L225 Difference]: With dead ends: 1129 [2021-11-13 02:38:14,068 INFO L226 Difference]: Without dead ends: 586 [2021-11-13 02:38:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:38:14,074 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 148 mSDsluCounter, 4443 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5353 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:14,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5353 Invalid, 85 Unknown, 0 Unchecked, 15.75ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 190.49ms Time] [2021-11-13 02:38:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-13 02:38:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2021-11-13 02:38:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 456 states have (on average 1.6644736842105263) internal successors, (759), 477 states have internal predecessors, (759), 100 states have call successors, (100), 26 states have call predecessors, (100), 27 states have return successors, (98), 93 states have call predecessors, (98), 95 states have call successors, (98) [2021-11-13 02:38:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 957 transitions. [2021-11-13 02:38:14,119 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 957 transitions. Word has length 134 [2021-11-13 02:38:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:14,120 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 957 transitions. [2021-11-13 02:38:14,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 957 transitions. [2021-11-13 02:38:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:38:14,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:14,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:14,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:14,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:14,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1975350248, now seen corresponding path program 1 times [2021-11-13 02:38:14,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:14,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593038560] [2021-11-13 02:38:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:14,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:14,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:14,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:14,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:38:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:14,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:38:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:38:15,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:15,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593038560] [2021-11-13 02:38:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593038560] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:15,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:15,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 02:38:15,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54405221] [2021-11-13 02:38:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:15,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:15,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:15,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:38:15,802 INFO L87 Difference]: Start difference. First operand 584 states and 957 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:15,936 INFO L93 Difference]: Finished difference Result 1142 states and 1883 transitions. [2021-11-13 02:38:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:38:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-13 02:38:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:15,944 INFO L225 Difference]: With dead ends: 1142 [2021-11-13 02:38:15,945 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 02:38:15,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:15,950 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 8 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:15,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2726 Invalid, 30 Unknown, 0 Unchecked, 9.42ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 45.94ms Time] [2021-11-13 02:38:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 02:38:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-13 02:38:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6651982378854626) internal successors, (756), 474 states have internal predecessors, (756), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-13 02:38:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 950 transitions. [2021-11-13 02:38:15,989 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 950 transitions. Word has length 134 [2021-11-13 02:38:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 950 transitions. [2021-11-13 02:38:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 950 transitions. [2021-11-13 02:38:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 02:38:15,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:15,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:16,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:16,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:16,213 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 683226491, now seen corresponding path program 1 times [2021-11-13 02:38:16,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:16,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035816395] [2021-11-13 02:38:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:16,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:16,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:16,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:38:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:17,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:38:17,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:17,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035816395] [2021-11-13 02:38:17,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035816395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:17,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:17,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:17,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952434513] [2021-11-13 02:38:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:17,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:17,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:17,783 INFO L87 Difference]: Start difference. First operand 580 states and 950 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:18,060 INFO L93 Difference]: Finished difference Result 1168 states and 1928 transitions. [2021-11-13 02:38:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-13 02:38:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:18,069 INFO L225 Difference]: With dead ends: 1168 [2021-11-13 02:38:18,069 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 02:38:18,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:18,075 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 134 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.80ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:18,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2534 Invalid, 131 Unknown, 0 Unchecked, 8.80ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 197.67ms Time] [2021-11-13 02:38:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 02:38:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-13 02:38:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6541850220264318) internal successors, (751), 474 states have internal predecessors, (751), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-13 02:38:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 945 transitions. [2021-11-13 02:38:18,109 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 945 transitions. Word has length 135 [2021-11-13 02:38:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:18,110 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 945 transitions. [2021-11-13 02:38:18,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 945 transitions. [2021-11-13 02:38:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:38:18,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:18,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:18,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:18,333 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1149892713, now seen corresponding path program 1 times [2021-11-13 02:38:18,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:18,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005999588] [2021-11-13 02:38:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:18,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:18,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:18,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:38:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:19,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:38:19,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:19,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005999588] [2021-11-13 02:38:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005999588] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:19,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135255764] [2021-11-13 02:38:19,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:19,759 INFO L87 Difference]: Start difference. First operand 580 states and 945 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:20,042 INFO L93 Difference]: Finished difference Result 1168 states and 1918 transitions. [2021-11-13 02:38:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-13 02:38:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:20,051 INFO L225 Difference]: With dead ends: 1168 [2021-11-13 02:38:20,051 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 02:38:20,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:20,057 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 128 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.26ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:20,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2534 Invalid, 121 Unknown, 0 Unchecked, 8.26ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 187.45ms Time] [2021-11-13 02:38:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 02:38:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-13 02:38:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6431718061674008) internal successors, (746), 474 states have internal predecessors, (746), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-13 02:38:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 940 transitions. [2021-11-13 02:38:20,101 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 940 transitions. Word has length 137 [2021-11-13 02:38:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:20,102 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 940 transitions. [2021-11-13 02:38:20,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 940 transitions. [2021-11-13 02:38:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:38:20,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:20,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:20,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:20,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:20,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash -795988261, now seen corresponding path program 1 times [2021-11-13 02:38:20,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:20,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072084894] [2021-11-13 02:38:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:20,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:20,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:38:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:21,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:38:21,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:21,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072084894] [2021-11-13 02:38:21,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072084894] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:21,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:21,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:21,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203720121] [2021-11-13 02:38:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:21,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:21,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:21,958 INFO L87 Difference]: Start difference. First operand 580 states and 940 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:22,227 INFO L93 Difference]: Finished difference Result 1189 states and 1939 transitions. [2021-11-13 02:38:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:38:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-13 02:38:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:22,238 INFO L225 Difference]: With dead ends: 1189 [2021-11-13 02:38:22,238 INFO L226 Difference]: Without dead ends: 610 [2021-11-13 02:38:22,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:22,244 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 143 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.50ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:22,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2544 Invalid, 131 Unknown, 0 Unchecked, 7.50ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 197.40ms Time] [2021-11-13 02:38:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-13 02:38:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 595. [2021-11-13 02:38:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 469 states have (on average 1.6226012793176972) internal successors, (761), 488 states have internal predecessors, (761), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 954 transitions. [2021-11-13 02:38:22,281 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 954 transitions. Word has length 139 [2021-11-13 02:38:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:22,282 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 954 transitions. [2021-11-13 02:38:22,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 954 transitions. [2021-11-13 02:38:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:38:22,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:22,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:22,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:22,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:22,505 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1139515995, now seen corresponding path program 1 times [2021-11-13 02:38:22,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:22,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339282014] [2021-11-13 02:38:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:22,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:22,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:38:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:23,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:38:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:23,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:24,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:24,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339282014] [2021-11-13 02:38:24,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339282014] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:24,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:24,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 02:38:24,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183874406] [2021-11-13 02:38:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:24,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:38:24,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:38:24,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:38:24,213 INFO L87 Difference]: Start difference. First operand 595 states and 954 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:24,441 INFO L93 Difference]: Finished difference Result 1153 states and 1860 transitions. [2021-11-13 02:38:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-13 02:38:24,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:24,451 INFO L225 Difference]: With dead ends: 1153 [2021-11-13 02:38:24,452 INFO L226 Difference]: Without dead ends: 589 [2021-11-13 02:38:24,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:24,459 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 131 mSDsluCounter, 4408 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5321 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.20ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:24,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5321 Invalid, 75 Unknown, 0 Unchecked, 11.52ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 165.20ms Time] [2021-11-13 02:38:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-13 02:38:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 574. [2021-11-13 02:38:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 448 states have (on average 1.6160714285714286) internal successors, (724), 467 states have internal predecessors, (724), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 917 transitions. [2021-11-13 02:38:24,494 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 917 transitions. Word has length 139 [2021-11-13 02:38:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:24,494 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 917 transitions. [2021-11-13 02:38:24,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 917 transitions. [2021-11-13 02:38:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 02:38:24,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:24,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:24,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:24,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,715 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 444043684, now seen corresponding path program 1 times [2021-11-13 02:38:24,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:24,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475597462] [2021-11-13 02:38:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:24,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:24,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:24,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:38:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:25,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:38:26,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:26,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475597462] [2021-11-13 02:38:26,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475597462] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:26,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:26,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:26,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118541323] [2021-11-13 02:38:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:26,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:26,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:26,140 INFO L87 Difference]: Start difference. First operand 574 states and 917 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:26,303 INFO L93 Difference]: Finished difference Result 1117 states and 1798 transitions. [2021-11-13 02:38:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-13 02:38:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:26,313 INFO L225 Difference]: With dead ends: 1117 [2021-11-13 02:38:26,313 INFO L226 Difference]: Without dead ends: 574 [2021-11-13 02:38:26,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:26,319 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 69 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:26,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2558 Invalid, 54 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 123.53ms Time] [2021-11-13 02:38:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-13 02:38:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-13 02:38:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 448 states have (on average 1.6138392857142858) internal successors, (723), 467 states have internal predecessors, (723), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 916 transitions. [2021-11-13 02:38:26,359 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 916 transitions. Word has length 140 [2021-11-13 02:38:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:26,360 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 916 transitions. [2021-11-13 02:38:26,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 916 transitions. [2021-11-13 02:38:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 02:38:26,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:26,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:26,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:26,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:26,597 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1408719190, now seen corresponding path program 1 times [2021-11-13 02:38:26,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:26,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174772378] [2021-11-13 02:38:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:26,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:26,601 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:26,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:38:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:27,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:38:28,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:28,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174772378] [2021-11-13 02:38:28,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174772378] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:28,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:28,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:38:28,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990816026] [2021-11-13 02:38:28,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:28,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:28,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:28,137 INFO L87 Difference]: Start difference. First operand 574 states and 916 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:28,287 INFO L93 Difference]: Finished difference Result 1117 states and 1797 transitions. [2021-11-13 02:38:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:28,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-13 02:38:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:28,296 INFO L225 Difference]: With dead ends: 1117 [2021-11-13 02:38:28,297 INFO L226 Difference]: Without dead ends: 574 [2021-11-13 02:38:28,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:28,302 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 67 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:28,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2558 Invalid, 52 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 111.21ms Time] [2021-11-13 02:38:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-13 02:38:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-13 02:38:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 448 states have (on average 1.6116071428571428) internal successors, (722), 467 states have internal predecessors, (722), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 915 transitions. [2021-11-13 02:38:28,331 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 915 transitions. Word has length 141 [2021-11-13 02:38:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:28,332 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 915 transitions. [2021-11-13 02:38:28,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:38:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 915 transitions. [2021-11-13 02:38:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 02:38:28,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:28,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:28,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:28,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:28,564 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1867687617, now seen corresponding path program 1 times [2021-11-13 02:38:28,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:28,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141731603] [2021-11-13 02:38:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:28,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:28,567 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:38:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:38:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:29,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:30,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:30,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141731603] [2021-11-13 02:38:30,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141731603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:30,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:30,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:38:30,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914833994] [2021-11-13 02:38:30,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:30,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:38:30,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:38:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:30,365 INFO L87 Difference]: Start difference. First operand 574 states and 915 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:30,711 INFO L93 Difference]: Finished difference Result 1122 states and 1804 transitions. [2021-11-13 02:38:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-13 02:38:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:30,720 INFO L225 Difference]: With dead ends: 1122 [2021-11-13 02:38:30,720 INFO L226 Difference]: Without dead ends: 585 [2021-11-13 02:38:30,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:30,726 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 109 mSDsluCounter, 5078 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5935 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:30,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5935 Invalid, 152 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 242.37ms Time] [2021-11-13 02:38:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-13 02:38:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 576. [2021-11-13 02:38:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 450 states have (on average 1.6066666666666667) internal successors, (723), 469 states have internal predecessors, (723), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 916 transitions. [2021-11-13 02:38:30,757 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 916 transitions. Word has length 142 [2021-11-13 02:38:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:30,757 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 916 transitions. [2021-11-13 02:38:30,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 916 transitions. [2021-11-13 02:38:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:38:30,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:30,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:30,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:30,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:30,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 539591937, now seen corresponding path program 1 times [2021-11-13 02:38:30,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:30,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522809237] [2021-11-13 02:38:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:30,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:30,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:31,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:38:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:38:32,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:32,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:32,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522809237] [2021-11-13 02:38:32,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522809237] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:32,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:32,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:38:32,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100777131] [2021-11-13 02:38:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:38:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:38:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:32,709 INFO L87 Difference]: Start difference. First operand 576 states and 916 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:32,964 INFO L93 Difference]: Finished difference Result 1114 states and 1785 transitions. [2021-11-13 02:38:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:32,966 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-13 02:38:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:32,973 INFO L225 Difference]: With dead ends: 1114 [2021-11-13 02:38:32,973 INFO L226 Difference]: Without dead ends: 581 [2021-11-13 02:38:32,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:32,978 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 77 mSDsluCounter, 5084 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5943 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.13ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.93ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:32,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5943 Invalid, 152 Unknown, 0 Unchecked, 8.13ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 173.93ms Time] [2021-11-13 02:38:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-13 02:38:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 578. [2021-11-13 02:38:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 452 states have (on average 1.6017699115044248) internal successors, (724), 471 states have internal predecessors, (724), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 917 transitions. [2021-11-13 02:38:33,008 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 917 transitions. Word has length 143 [2021-11-13 02:38:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 917 transitions. [2021-11-13 02:38:33,009 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:38:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 917 transitions. [2021-11-13 02:38:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:38:33,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:33,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:33,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:33,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:33,245 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 725098697, now seen corresponding path program 1 times [2021-11-13 02:38:33,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:33,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732223104] [2021-11-13 02:38:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:33,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:33,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:33,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:38:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:38:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:34,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:34,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:34,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732223104] [2021-11-13 02:38:34,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732223104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:34,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:34,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:38:34,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160151544] [2021-11-13 02:38:34,938 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:38:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:38:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:34,940 INFO L87 Difference]: Start difference. First operand 578 states and 917 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:35,175 INFO L93 Difference]: Finished difference Result 1060 states and 1712 transitions. [2021-11-13 02:38:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:38:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-13 02:38:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:35,185 INFO L225 Difference]: With dead ends: 1060 [2021-11-13 02:38:35,185 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:38:35,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:38:35,192 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 56 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 5159 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:35,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 5159 Invalid, 83 Unknown, 0 Unchecked, 8.66ms Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 167.38ms Time] [2021-11-13 02:38:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:38:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-13 02:38:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 445 states have (on average 1.6089887640449438) internal successors, (716), 464 states have internal predecessors, (716), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 909 transitions. [2021-11-13 02:38:35,227 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 909 transitions. Word has length 144 [2021-11-13 02:38:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:35,227 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 909 transitions. [2021-11-13 02:38:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 909 transitions. [2021-11-13 02:38:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:38:35,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:35,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:35,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:35,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:35,462 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1036511741, now seen corresponding path program 1 times [2021-11-13 02:38:35,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:35,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940771032] [2021-11-13 02:38:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:35,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:35,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:35,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:38:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:38:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:36,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:37,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:37,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940771032] [2021-11-13 02:38:37,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940771032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:37,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:37,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:38:37,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405929758] [2021-11-13 02:38:37,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:37,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:38:37,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:38:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:37,084 INFO L87 Difference]: Start difference. First operand 571 states and 909 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:37,253 INFO L93 Difference]: Finished difference Result 1065 states and 1726 transitions. [2021-11-13 02:38:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-13 02:38:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:37,262 INFO L225 Difference]: With dead ends: 1065 [2021-11-13 02:38:37,262 INFO L226 Difference]: Without dead ends: 568 [2021-11-13 02:38:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:38:37,267 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 98 mSDsluCounter, 5076 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5939 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:37,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 5939 Invalid, 78 Unknown, 0 Unchecked, 7.33ms Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 119.14ms Time] [2021-11-13 02:38:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-13 02:38:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-13 02:38:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 442 states have (on average 1.6085972850678734) internal successors, (711), 461 states have internal predecessors, (711), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 904 transitions. [2021-11-13 02:38:37,339 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 904 transitions. Word has length 145 [2021-11-13 02:38:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 904 transitions. [2021-11-13 02:38:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 904 transitions. [2021-11-13 02:38:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:38:37,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:37,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:37,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:37,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:37,553 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2031847037, now seen corresponding path program 1 times [2021-11-13 02:38:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:37,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456179979] [2021-11-13 02:38:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:37,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:37,557 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:38:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:38:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:39,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:39,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456179979] [2021-11-13 02:38:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456179979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:39,016 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:38:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901662654] [2021-11-13 02:38:39,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:38:39,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:38:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:38:39,019 INFO L87 Difference]: Start difference. First operand 568 states and 904 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 02:38:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:39,200 INFO L93 Difference]: Finished difference Result 1062 states and 1721 transitions. [2021-11-13 02:38:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:39,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-13 02:38:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:39,208 INFO L225 Difference]: With dead ends: 1062 [2021-11-13 02:38:39,209 INFO L226 Difference]: Without dead ends: 560 [2021-11-13 02:38:39,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:39,214 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 176 mSDsluCounter, 3427 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4289 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.12ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:39,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4289 Invalid, 63 Unknown, 0 Unchecked, 6.12ms Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 138.06ms Time] [2021-11-13 02:38:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-13 02:38:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-13 02:38:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 434 states have (on average 1.6129032258064515) internal successors, (700), 453 states have internal predecessors, (700), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 893 transitions. [2021-11-13 02:38:39,242 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 893 transitions. Word has length 145 [2021-11-13 02:38:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:39,243 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 893 transitions. [2021-11-13 02:38:39,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 02:38:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 893 transitions. [2021-11-13 02:38:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:38:39,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:39,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:39,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:39,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:39,465 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash 137344109, now seen corresponding path program 1 times [2021-11-13 02:38:39,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:39,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391757464] [2021-11-13 02:38:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:39,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:39,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:39,468 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:39,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:38:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:38:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:40,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:41,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:41,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391757464] [2021-11-13 02:38:41,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391757464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:41,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:41,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:41,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097504429] [2021-11-13 02:38:41,319 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:41,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:41,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:41,321 INFO L87 Difference]: Start difference. First operand 560 states and 893 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:41,564 INFO L93 Difference]: Finished difference Result 1048 states and 1699 transitions. [2021-11-13 02:38:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-13 02:38:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:41,573 INFO L225 Difference]: With dead ends: 1048 [2021-11-13 02:38:41,573 INFO L226 Difference]: Without dead ends: 560 [2021-11-13 02:38:41,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:38:41,578 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 92 mSDsluCounter, 6737 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7595 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:41,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 7595 Invalid, 132 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 176.90ms Time] [2021-11-13 02:38:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-13 02:38:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-13 02:38:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 434 states have (on average 1.6105990783410138) internal successors, (699), 453 states have internal predecessors, (699), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 892 transitions. [2021-11-13 02:38:41,608 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 892 transitions. Word has length 146 [2021-11-13 02:38:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:41,608 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 892 transitions. [2021-11-13 02:38:41,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 892 transitions. [2021-11-13 02:38:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:38:41,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:41,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:41,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:41,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:41,829 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -590805253, now seen corresponding path program 1 times [2021-11-13 02:38:41,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:41,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825418950] [2021-11-13 02:38:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:41,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:41,832 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:41,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:38:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:38:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:42,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:43,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825418950] [2021-11-13 02:38:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825418950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:43,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:43,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:43,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489403667] [2021-11-13 02:38:43,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:43,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:43,593 INFO L87 Difference]: Start difference. First operand 560 states and 892 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:43,914 INFO L93 Difference]: Finished difference Result 1092 states and 1756 transitions. [2021-11-13 02:38:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-13 02:38:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:43,922 INFO L225 Difference]: With dead ends: 1092 [2021-11-13 02:38:43,923 INFO L226 Difference]: Without dead ends: 557 [2021-11-13 02:38:43,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:43,928 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 130 mSDsluCounter, 6686 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7532 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.60ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:43,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 7532 Invalid, 131 Unknown, 0 Unchecked, 9.60ms Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 223.36ms Time] [2021-11-13 02:38:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-13 02:38:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-13 02:38:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 431 states have (on average 1.603248259860789) internal successors, (691), 450 states have internal predecessors, (691), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 884 transitions. [2021-11-13 02:38:43,955 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 884 transitions. Word has length 147 [2021-11-13 02:38:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:43,956 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 884 transitions. [2021-11-13 02:38:43,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 884 transitions. [2021-11-13 02:38:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 02:38:43,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:43,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:43,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:44,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:44,177 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 855124402, now seen corresponding path program 1 times [2021-11-13 02:38:44,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:44,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772490888] [2021-11-13 02:38:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:44,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:44,181 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:38:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:45,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:45,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:45,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772490888] [2021-11-13 02:38:45,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772490888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:45,786 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:45,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:45,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518405941] [2021-11-13 02:38:45,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:45,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:45,788 INFO L87 Difference]: Start difference. First operand 557 states and 884 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:46,083 INFO L93 Difference]: Finished difference Result 1039 states and 1679 transitions. [2021-11-13 02:38:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-13 02:38:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:46,091 INFO L225 Difference]: With dead ends: 1039 [2021-11-13 02:38:46,091 INFO L226 Difference]: Without dead ends: 557 [2021-11-13 02:38:46,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:38:46,096 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 68 mSDsluCounter, 6709 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7556 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:46,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7556 Invalid, 138 Unknown, 0 Unchecked, 8.31ms Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 196.05ms Time] [2021-11-13 02:38:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-13 02:38:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-13 02:38:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 431 states have (on average 1.6009280742459397) internal successors, (690), 450 states have internal predecessors, (690), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 883 transitions. [2021-11-13 02:38:46,127 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 883 transitions. Word has length 148 [2021-11-13 02:38:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:46,127 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 883 transitions. [2021-11-13 02:38:46,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 883 transitions. [2021-11-13 02:38:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 02:38:46,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:46,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:46,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:46,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:46,349 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1951573044, now seen corresponding path program 1 times [2021-11-13 02:38:46,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:46,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782908903] [2021-11-13 02:38:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:46,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:46,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:46,353 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:46,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 02:38:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:38:48,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:48,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782908903] [2021-11-13 02:38:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782908903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:48,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:48,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:48,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778257026] [2021-11-13 02:38:48,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:48,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:48,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:48,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:48,016 INFO L87 Difference]: Start difference. First operand 557 states and 883 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:48,233 INFO L93 Difference]: Finished difference Result 1077 states and 1724 transitions. [2021-11-13 02:38:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:48,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-13 02:38:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:48,241 INFO L225 Difference]: With dead ends: 1077 [2021-11-13 02:38:48,241 INFO L226 Difference]: Without dead ends: 554 [2021-11-13 02:38:48,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:48,246 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 133 mSDsluCounter, 5034 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 5879 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.98ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:48,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 5879 Invalid, 114 Unknown, 0 Unchecked, 5.98ms Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 143.22ms Time] [2021-11-13 02:38:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-13 02:38:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-13 02:38:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 428 states have (on average 1.5934579439252337) internal successors, (682), 447 states have internal predecessors, (682), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:38:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 875 transitions. [2021-11-13 02:38:48,273 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 875 transitions. Word has length 149 [2021-11-13 02:38:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 875 transitions. [2021-11-13 02:38:48,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 02:38:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 875 transitions. [2021-11-13 02:38:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 02:38:48,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:48,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:48,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-13 02:38:48,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:48,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1895191113, now seen corresponding path program 1 times [2021-11-13 02:38:48,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:48,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123125110] [2021-11-13 02:38:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:48,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:48,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:48,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:48,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:38:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:38:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:38:49,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:38:50,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:50,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123125110] [2021-11-13 02:38:50,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123125110] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:50,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:50,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:38:50,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375958092] [2021-11-13 02:38:50,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:50,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:38:50,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:38:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:50,311 INFO L87 Difference]: Start difference. First operand 554 states and 875 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:38:52,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:54,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:55,532 INFO L93 Difference]: Finished difference Result 1032 states and 1688 transitions. [2021-11-13 02:38:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:38:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-13 02:38:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:55,538 INFO L225 Difference]: With dead ends: 1032 [2021-11-13 02:38:55,538 INFO L226 Difference]: Without dead ends: 558 [2021-11-13 02:38:55,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:38:55,543 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 779 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4972.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.78ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5137.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:55,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2139 Invalid, 449 Unknown, 0 Unchecked, 15.78ms Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 2 Unknown, 0 Unchecked, 5137.49ms Time] [2021-11-13 02:38:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-13 02:38:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-13 02:38:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 431 states have (on average 1.5893271461716938) internal successors, (685), 450 states have internal predecessors, (685), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-13 02:38:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 879 transitions. [2021-11-13 02:38:55,584 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 879 transitions. Word has length 150 [2021-11-13 02:38:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:55,584 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 879 transitions. [2021-11-13 02:38:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:38:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 879 transitions. [2021-11-13 02:38:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 02:38:55,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:55,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:55,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:55,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:55,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:55,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1643840963, now seen corresponding path program 1 times [2021-11-13 02:38:55,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:55,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516940036] [2021-11-13 02:38:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:55,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:55,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:55,807 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:55,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 02:38:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:38:56,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:38:56,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:38:57,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:57,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516940036] [2021-11-13 02:38:57,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516940036] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:57,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:38:57,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:38:57,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948714670] [2021-11-13 02:38:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:57,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:38:57,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:38:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:57,488 INFO L87 Difference]: Start difference. First operand 558 states and 879 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:38:59,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:01,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:02,408 INFO L93 Difference]: Finished difference Result 1041 states and 1695 transitions. [2021-11-13 02:39:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-13 02:39:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:02,414 INFO L225 Difference]: With dead ends: 1041 [2021-11-13 02:39:02,415 INFO L226 Difference]: Without dead ends: 563 [2021-11-13 02:39:02,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:39:02,420 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 789 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4710.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.63ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4860.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:02,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2140 Invalid, 451 Unknown, 0 Unchecked, 6.63ms Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 4860.09ms Time] [2021-11-13 02:39:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-13 02:39:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-13 02:39:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 435 states have (on average 1.5839080459770114) internal successors, (689), 454 states have internal predecessors, (689), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-13 02:39:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 884 transitions. [2021-11-13 02:39:02,449 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 884 transitions. Word has length 152 [2021-11-13 02:39:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:02,449 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 884 transitions. [2021-11-13 02:39:02,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:39:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 884 transitions. [2021-11-13 02:39:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 02:39:02,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:02,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:02,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:02,669 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash -144509513, now seen corresponding path program 1 times [2021-11-13 02:39:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:02,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696124256] [2021-11-13 02:39:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:02,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:02,671 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:02,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:39:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:39:03,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:39:04,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696124256] [2021-11-13 02:39:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696124256] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:04,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:04,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:39:04,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841910052] [2021-11-13 02:39:04,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:04,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:04,336 INFO L87 Difference]: Start difference. First operand 563 states and 884 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:39:06,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:08,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:09,206 INFO L93 Difference]: Finished difference Result 1052 states and 1704 transitions. [2021-11-13 02:39:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-13 02:39:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:09,213 INFO L225 Difference]: With dead ends: 1052 [2021-11-13 02:39:09,213 INFO L226 Difference]: Without dead ends: 569 [2021-11-13 02:39:09,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:39:09,218 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 789 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4710.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4824.51ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:09,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2140 Invalid, 450 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [12 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 4824.51ms Time] [2021-11-13 02:39:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-13 02:39:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-13 02:39:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 440 states have (on average 1.5772727272727274) internal successors, (694), 459 states have internal predecessors, (694), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-13 02:39:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 890 transitions. [2021-11-13 02:39:09,246 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 890 transitions. Word has length 154 [2021-11-13 02:39:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:09,247 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 890 transitions. [2021-11-13 02:39:09,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:39:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 890 transitions. [2021-11-13 02:39:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 02:39:09,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:09,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:09,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:09,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:09,465 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1042325445, now seen corresponding path program 1 times [2021-11-13 02:39:09,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:09,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964808573] [2021-11-13 02:39:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:09,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:09,467 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:09,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:39:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:10,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:39:10,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:39:11,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:11,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964808573] [2021-11-13 02:39:11,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964808573] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:11,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:11,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:39:11,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852368894] [2021-11-13 02:39:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:11,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:11,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:11,127 INFO L87 Difference]: Start difference. First operand 569 states and 890 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:39:13,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:15,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:16,058 INFO L93 Difference]: Finished difference Result 1065 states and 1715 transitions. [2021-11-13 02:39:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-13 02:39:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:16,063 INFO L225 Difference]: With dead ends: 1065 [2021-11-13 02:39:16,063 INFO L226 Difference]: Without dead ends: 576 [2021-11-13 02:39:16,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:39:16,067 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 786 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4748.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.41ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4880.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:16,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2140 Invalid, 449 Unknown, 0 Unchecked, 6.41ms Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 2 Unknown, 0 Unchecked, 4880.15ms Time] [2021-11-13 02:39:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-13 02:39:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-13 02:39:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 446 states have (on average 1.5695067264573992) internal successors, (700), 465 states have internal predecessors, (700), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2021-11-13 02:39:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 897 transitions. [2021-11-13 02:39:16,096 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 897 transitions. Word has length 156 [2021-11-13 02:39:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 897 transitions. [2021-11-13 02:39:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:39:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 897 transitions. [2021-11-13 02:39:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-13 02:39:16,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:16,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:16,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-13 02:39:16,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:16,345 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash -345506889, now seen corresponding path program 1 times [2021-11-13 02:39:16,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:16,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152899] [2021-11-13 02:39:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:16,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:16,347 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:16,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:39:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:39:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:17,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:39:18,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:18,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152899] [2021-11-13 02:39:18,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:18,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [992671579] [2021-11-13 02:39:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:18,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:18,801 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-13 02:39:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:39:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:39:19,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:39:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [992671579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:20,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:20,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-13 02:39:20,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624253520] [2021-11-13 02:39:20,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:20,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:20,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:39:20,713 INFO L87 Difference]: Start difference. First operand 576 states and 897 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 02:39:22,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:23,387 INFO L93 Difference]: Finished difference Result 1068 states and 1701 transitions. [2021-11-13 02:39:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:39:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 158 [2021-11-13 02:39:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:23,394 INFO L225 Difference]: With dead ends: 1068 [2021-11-13 02:39:23,394 INFO L226 Difference]: Without dead ends: 572 [2021-11-13 02:39:23,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:39:23,398 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1259 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 357 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2515.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.07ms SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2618.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:23,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 773 Invalid, 458 Unknown, 0 Unchecked, 5.07ms Time], IncrementalHoareTripleChecker [357 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 2618.97ms Time] [2021-11-13 02:39:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-13 02:39:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-13 02:39:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 444 states have (on average 1.5653153153153154) internal successors, (695), 462 states have internal predecessors, (695), 97 states have call successors, (97), 31 states have call predecessors, (97), 30 states have return successors, (97), 91 states have call predecessors, (97), 93 states have call successors, (97) [2021-11-13 02:39:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 889 transitions. [2021-11-13 02:39:23,430 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 889 transitions. Word has length 158 [2021-11-13 02:39:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:23,431 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 889 transitions. [2021-11-13 02:39:23,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 02:39:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 889 transitions. [2021-11-13 02:39:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 02:39:23,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:23,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:23,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:23,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-13 02:39:23,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:23,852 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2120922972, now seen corresponding path program 1 times [2021-11-13 02:39:23,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:23,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025996274] [2021-11-13 02:39:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:23,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:23,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:23,855 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:23,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:39:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:39:24,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:25,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:39:26,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:26,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025996274] [2021-11-13 02:39:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025996274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:26,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605198627] [2021-11-13 02:39:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:26,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:26,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:26,228 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:26,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-13 02:39:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:39:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:39:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605198627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:28,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726703652] [2021-11-13 02:39:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:28,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:39:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:39:28,191 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:39:28,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 02:39:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:39:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:29,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:39:30,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726703652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:30,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:39:30,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-13 02:39:30,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441316487] [2021-11-13 02:39:30,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:39:30,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:39:30,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:39:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:39:30,333 INFO L87 Difference]: Start difference. First operand 572 states and 889 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-13 02:39:32,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:34,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:36,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:38,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:40,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:53,929 INFO L93 Difference]: Finished difference Result 1821 states and 2954 transitions. [2021-11-13 02:39:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:39:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-13 02:39:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:53,944 INFO L225 Difference]: With dead ends: 1821 [2021-11-13 02:39:53,944 INFO L226 Difference]: Without dead ends: 1329 [2021-11-13 02:39:53,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:39:53,950 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 4173 mSDsluCounter, 5527 mSDsCounter, 0 mSdLazyCounter, 10193 mSolverCounterSat, 1534 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21221.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4251 SdHoareTripleChecker+Valid, 7215 SdHoareTripleChecker+Invalid, 11732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 86.70ms SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 10193 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23005.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:53,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4251 Valid, 7215 Invalid, 11732 Unknown, 0 Unchecked, 86.70ms Time], IncrementalHoareTripleChecker [1534 Valid, 10193 Invalid, 5 Unknown, 0 Unchecked, 23005.78ms Time] [2021-11-13 02:39:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-11-13 02:39:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1179. [2021-11-13 02:39:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 894 states have (on average 1.587248322147651) internal successors, (1419), 933 states have internal predecessors, (1419), 223 states have call successors, (223), 55 states have call predecessors, (223), 61 states have return successors, (246), 221 states have call predecessors, (246), 219 states have call successors, (246) [2021-11-13 02:39:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1888 transitions. [2021-11-13 02:39:54,047 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1888 transitions. Word has length 159 [2021-11-13 02:39:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:54,047 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1888 transitions. [2021-11-13 02:39:54,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-13 02:39:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1888 transitions. [2021-11-13 02:39:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 02:39:54,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:54,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:54,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:54,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-13 02:39:54,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-13 02:39:54,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:39:54,670 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -967910272, now seen corresponding path program 1 times [2021-11-13 02:39:54,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:54,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003137849] [2021-11-13 02:39:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:54,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:54,673 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:54,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 02:39:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:39:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:55,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:39:56,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:56,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003137849] [2021-11-13 02:39:56,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003137849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:56,143 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-13 02:39:56,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677627010] [2021-11-13 02:39:56,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:56,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:39:56,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:39:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:39:56,145 INFO L87 Difference]: Start difference. First operand 1179 states and 1888 transitions. Second operand has 10 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 02:39:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:56,374 INFO L93 Difference]: Finished difference Result 1674 states and 2688 transitions. [2021-11-13 02:39:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:39:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-13 02:39:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:56,381 INFO L225 Difference]: With dead ends: 1674 [2021-11-13 02:39:56,382 INFO L226 Difference]: Without dead ends: 565 [2021-11-13 02:39:56,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:39:56,388 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 69 mSDsluCounter, 6521 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 7349 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:56,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 7349 Invalid, 111 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 153.87ms Time] [2021-11-13 02:39:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-13 02:39:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-13 02:39:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 439 states have (on average 1.560364464692483) internal successors, (685), 457 states have internal predecessors, (685), 95 states have call successors, (95), 31 states have call predecessors, (95), 30 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-13 02:39:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 875 transitions. [2021-11-13 02:39:56,421 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 875 transitions. Word has length 161 [2021-11-13 02:39:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:56,422 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 875 transitions. [2021-11-13 02:39:56,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.88888888888889) internal successors, (179), 9 states have internal predecessors, (179), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 02:39:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 875 transitions. [2021-11-13 02:39:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 02:39:56,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:56,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:56,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:56,650 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1378898734, now seen corresponding path program 1 times [2021-11-13 02:39:56,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:56,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729736106] [2021-11-13 02:39:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:56,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:56,651 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:56,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 02:39:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:39:57,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:39:57,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:39:58,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:58,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729736106] [2021-11-13 02:39:58,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729736106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:58,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676479366] [2021-11-13 02:39:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:58,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:58,512 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:58,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-13 02:39:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:39:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:39:59,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:40:00,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676479366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:00,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638710304] [2021-11-13 02:40:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:00,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:40:00,175 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:40:00,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 02:40:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:40:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:40:00,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:40:01,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638710304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:01,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:40:01,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-13 02:40:01,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677093769] [2021-11-13 02:40:01,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:40:01,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:40:01,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:01,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:40:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:40:01,722 INFO L87 Difference]: Start difference. First operand 565 states and 875 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-13 02:40:03,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:05,764 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:07,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:09,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:11,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:14,287 INFO L93 Difference]: Finished difference Result 1058 states and 1680 transitions. [2021-11-13 02:40:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:40:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-13 02:40:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:14,292 INFO L225 Difference]: With dead ends: 1058 [2021-11-13 02:40:14,293 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:40:14,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:40:14,296 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1907 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2812 mSolverCounterSat, 541 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12100.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.35ms SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 2812 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12447.52ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:14,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 2249 Invalid, 3358 Unknown, 0 Unchecked, 13.35ms Time], IncrementalHoareTripleChecker [541 Valid, 2812 Invalid, 5 Unknown, 0 Unchecked, 12447.52ms Time] [2021-11-13 02:40:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:40:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2021-11-13 02:40:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 442 states have (on average 1.5565610859728507) internal successors, (688), 460 states have internal predecessors, (688), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (100), 90 states have call predecessors, (100), 91 states have call successors, (100) [2021-11-13 02:40:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 883 transitions. [2021-11-13 02:40:14,328 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 883 transitions. Word has length 165 [2021-11-13 02:40:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:14,328 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 883 transitions. [2021-11-13 02:40:14,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-13 02:40:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 883 transitions. [2021-11-13 02:40:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-13 02:40:14,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:14,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:14,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:14,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-13 02:40:14,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-13 02:40:14,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:14,960 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1746262676, now seen corresponding path program 1 times [2021-11-13 02:40:14,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:14,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689345361] [2021-11-13 02:40:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:14,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:14,962 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:14,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-13 02:40:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:15,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:16,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:16,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689345361] [2021-11-13 02:40:16,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689345361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:16,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728484833] [2021-11-13 02:40:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:16,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:16,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:40:16,372 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:40:16,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-13 02:40:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:16,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:17,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:17,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1728484833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:17,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345634341] [2021-11-13 02:40:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:17,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:40:17,606 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:40:17,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 02:40:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:18,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:18,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345634341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:18,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:40:18,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-13 02:40:18,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491624990] [2021-11-13 02:40:18,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:40:18,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:40:18,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:40:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:40:18,865 INFO L87 Difference]: Start difference. First operand 569 states and 883 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 02:40:20,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:22,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:27,901 INFO L93 Difference]: Finished difference Result 2035 states and 3277 transitions. [2021-11-13 02:40:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:40:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-13 02:40:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:27,913 INFO L225 Difference]: With dead ends: 2035 [2021-11-13 02:40:27,913 INFO L226 Difference]: Without dead ends: 1544 [2021-11-13 02:40:27,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:40:27,917 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 4544 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 1374 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8037.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4625 SdHoareTripleChecker+Valid, 2802 SdHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.71ms SdHoareTripleChecker+Time, 1374 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8707.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:27,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4625 Valid, 2802 Invalid, 4945 Unknown, 0 Unchecked, 29.71ms Time], IncrementalHoareTripleChecker [1374 Valid, 3569 Invalid, 2 Unknown, 0 Unchecked, 8707.54ms Time] [2021-11-13 02:40:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-13 02:40:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1486. [2021-11-13 02:40:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1146 states have (on average 1.5794066317626527) internal successors, (1810), 1191 states have internal predecessors, (1810), 259 states have call successors, (259), 80 states have call predecessors, (259), 80 states have return successors, (288), 251 states have call predecessors, (288), 255 states have call successors, (288) [2021-11-13 02:40:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2357 transitions. [2021-11-13 02:40:28,040 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2357 transitions. Word has length 166 [2021-11-13 02:40:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:28,041 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 2357 transitions. [2021-11-13 02:40:28,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-13 02:40:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2357 transitions. [2021-11-13 02:40:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 02:40:28,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:28,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:28,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:28,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-13 02:40:28,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-13 02:40:28,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:28,665 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 278547349, now seen corresponding path program 1 times [2021-11-13 02:40:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:28,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416689232] [2021-11-13 02:40:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:28,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:28,667 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:28,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-13 02:40:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:40:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:40:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:40:30,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:30,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416689232] [2021-11-13 02:40:30,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416689232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:30,297 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:30,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 02:40:30,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605544262] [2021-11-13 02:40:30,297 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:30,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:40:30,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:40:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:40:30,299 INFO L87 Difference]: Start difference. First operand 1486 states and 2357 transitions. Second operand has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-13 02:40:32,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:34,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:36,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:42,958 INFO L93 Difference]: Finished difference Result 5029 states and 8220 transitions. [2021-11-13 02:40:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:40:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 168 [2021-11-13 02:40:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:42,993 INFO L225 Difference]: With dead ends: 5029 [2021-11-13 02:40:42,994 INFO L226 Difference]: Without dead ends: 3621 [2021-11-13 02:40:43,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:40:43,046 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 4053 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 5222 mSolverCounterSat, 1227 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11417.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4159 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 6452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.27ms SdHoareTripleChecker+Time, 1227 IncrementalHoareTripleChecker+Valid, 5222 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12264.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:43,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4159 Valid, 3369 Invalid, 6452 Unknown, 0 Unchecked, 35.27ms Time], IncrementalHoareTripleChecker [1227 Valid, 5222 Invalid, 3 Unknown, 0 Unchecked, 12264.36ms Time] [2021-11-13 02:40:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-11-13 02:40:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3167. [2021-11-13 02:40:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 2399 states have (on average 1.5810754481033764) internal successors, (3793), 2507 states have internal predecessors, (3793), 605 states have call successors, (605), 152 states have call predecessors, (605), 162 states have return successors, (691), 596 states have call predecessors, (691), 601 states have call successors, (691) [2021-11-13 02:40:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 5089 transitions. [2021-11-13 02:40:43,274 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 5089 transitions. Word has length 168 [2021-11-13 02:40:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:43,274 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 5089 transitions. [2021-11-13 02:40:43,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-13 02:40:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 5089 transitions. [2021-11-13 02:40:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 02:40:43,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:43,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:43,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:43,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:43,502 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1896132748, now seen corresponding path program 1 times [2021-11-13 02:40:43,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:43,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031098575] [2021-11-13 02:40:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:43,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:43,504 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:43,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-13 02:40:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:40:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:40:44,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:40:45,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:45,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031098575] [2021-11-13 02:40:45,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031098575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:45,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:45,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 02:40:45,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750146666] [2021-11-13 02:40:45,106 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:45,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:40:45,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:40:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:40:45,108 INFO L87 Difference]: Start difference. First operand 3167 states and 5089 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-13 02:40:47,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:49,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:51,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:57,443 INFO L93 Difference]: Finished difference Result 8871 states and 14389 transitions. [2021-11-13 02:40:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:40:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-13 02:40:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:57,479 INFO L225 Difference]: With dead ends: 8871 [2021-11-13 02:40:57,479 INFO L226 Difference]: Without dead ends: 6504 [2021-11-13 02:40:57,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:40:57,492 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 3053 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 686 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10878.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3127 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 5664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.46ms SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11644.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:57,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3127 Valid, 3325 Invalid, 5664 Unknown, 0 Unchecked, 33.46ms Time], IncrementalHoareTripleChecker [686 Valid, 4975 Invalid, 3 Unknown, 0 Unchecked, 11644.04ms Time] [2021-11-13 02:40:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2021-11-13 02:40:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 6222. [2021-11-13 02:40:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 4730 states have (on average 1.5750528541226216) internal successors, (7450), 4943 states have internal predecessors, (7450), 1145 states have call successors, (1145), 290 states have call predecessors, (1145), 346 states have return successors, (1436), 1135 states have call predecessors, (1436), 1141 states have call successors, (1436) [2021-11-13 02:40:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 10031 transitions. [2021-11-13 02:40:58,020 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 10031 transitions. Word has length 168 [2021-11-13 02:40:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 10031 transitions. [2021-11-13 02:40:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-13 02:40:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 10031 transitions. [2021-11-13 02:40:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 02:40:58,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:58,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:58,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:58,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:58,225 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1982003316, now seen corresponding path program 1 times [2021-11-13 02:40:58,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:58,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771386412] [2021-11-13 02:40:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:58,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:58,227 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:58,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-13 02:40:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:58,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:40:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:40:59,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:41:00,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:00,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771386412] [2021-11-13 02:41:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771386412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:00,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:00,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-13 02:41:00,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638977149] [2021-11-13 02:41:00,599 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:00,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:41:00,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:41:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:41:00,600 INFO L87 Difference]: Start difference. First operand 6222 states and 10031 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-13 02:41:02,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:04,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:06,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:08,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:10,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:12,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:14,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:16,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:18,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:23,018 INFO L93 Difference]: Finished difference Result 11592 states and 18765 transitions. [2021-11-13 02:41:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:41:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-13 02:41:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:23,053 INFO L225 Difference]: With dead ends: 11592 [2021-11-13 02:41:23,053 INFO L226 Difference]: Without dead ends: 6174 [2021-11-13 02:41:23,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:41:23,116 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 2128 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 551 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21387.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 5355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.90ms SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21947.99ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:23,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2128 Valid, 3434 Invalid, 5355 Unknown, 0 Unchecked, 21.90ms Time], IncrementalHoareTripleChecker [551 Valid, 4795 Invalid, 9 Unknown, 0 Unchecked, 21947.99ms Time] [2021-11-13 02:41:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2021-11-13 02:41:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 6174. [2021-11-13 02:41:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6174 states, 4704 states have (on average 1.5752551020408163) internal successors, (7410), 4913 states have internal predecessors, (7410), 1131 states have call successors, (1131), 286 states have call predecessors, (1131), 338 states have return successors, (1414), 1121 states have call predecessors, (1414), 1127 states have call successors, (1414) [2021-11-13 02:41:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6174 states to 6174 states and 9955 transitions. [2021-11-13 02:41:23,679 INFO L78 Accepts]: Start accepts. Automaton has 6174 states and 9955 transitions. Word has length 170 [2021-11-13 02:41:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:23,679 INFO L470 AbstractCegarLoop]: Abstraction has 6174 states and 9955 transitions. [2021-11-13 02:41:23,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-13 02:41:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6174 states and 9955 transitions. [2021-11-13 02:41:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-13 02:41:23,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:23,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:23,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-13 02:41:23,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:23,884 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452041, now seen corresponding path program 1 times [2021-11-13 02:41:23,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:23,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966767482] [2021-11-13 02:41:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:23,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:23,886 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:23,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-13 02:41:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:24,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:41:24,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:41:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:41:25,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:25,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966767482] [2021-11-13 02:41:25,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966767482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:25,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:25,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-13 02:41:25,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143864581] [2021-11-13 02:41:25,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:25,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:41:25,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:41:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:41:25,885 INFO L87 Difference]: Start difference. First operand 6174 states and 9955 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-13 02:41:27,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:29,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:31,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:33,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:42,150 INFO L93 Difference]: Finished difference Result 16420 states and 26509 transitions. [2021-11-13 02:41:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:41:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-13 02:41:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:42,252 INFO L225 Difference]: With dead ends: 16420 [2021-11-13 02:41:42,253 INFO L226 Difference]: Without dead ends: 10934 [2021-11-13 02:41:42,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:41:42,272 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 3320 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 6310 mSolverCounterSat, 919 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14175.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 7233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.87ms SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 6310 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15124.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:42,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3397 Valid, 3065 Invalid, 7233 Unknown, 0 Unchecked, 32.87ms Time], IncrementalHoareTripleChecker [919 Valid, 6310 Invalid, 4 Unknown, 0 Unchecked, 15124.38ms Time] [2021-11-13 02:41:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2021-11-13 02:41:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10850. [2021-11-13 02:41:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 8224 states have (on average 1.5605544747081712) internal successors, (12834), 8596 states have internal predecessors, (12834), 1999 states have call successors, (1999), 535 states have call predecessors, (1999), 626 states have return successors, (2540), 1979 states have call predecessors, (2540), 1995 states have call successors, (2540) [2021-11-13 02:41:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 17373 transitions. [2021-11-13 02:41:43,187 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 17373 transitions. Word has length 173 [2021-11-13 02:41:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:43,188 INFO L470 AbstractCegarLoop]: Abstraction has 10850 states and 17373 transitions. [2021-11-13 02:41:43,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-13 02:41:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 17373 transitions. [2021-11-13 02:41:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-13 02:41:43,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:43,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:43,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:43,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:43,408 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash -827954729, now seen corresponding path program 1 times [2021-11-13 02:41:43,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:43,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183326718] [2021-11-13 02:41:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:43,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:43,411 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:43,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-13 02:41:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:41:44,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:41:44,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:41:44,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:44,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183326718] [2021-11-13 02:41:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183326718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:44,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:44,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:41:44,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357521902] [2021-11-13 02:41:44,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:44,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:41:44,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:41:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:41:44,900 INFO L87 Difference]: Start difference. First operand 10850 states and 17373 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 02:41:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:45,682 INFO L93 Difference]: Finished difference Result 21548 states and 34821 transitions. [2021-11-13 02:41:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:41:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-13 02:41:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:45,747 INFO L225 Difference]: With dead ends: 21548 [2021-11-13 02:41:45,747 INFO L226 Difference]: Without dead ends: 10850 [2021-11-13 02:41:45,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:41:45,783 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 643 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:45,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 3024 Invalid, 127 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [59 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 98.82ms Time] [2021-11-13 02:41:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2021-11-13 02:41:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10850. [2021-11-13 02:41:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 8224 states have (on average 1.5454766536964981) internal successors, (12710), 8596 states have internal predecessors, (12710), 1999 states have call successors, (1999), 535 states have call predecessors, (1999), 626 states have return successors, (2540), 1979 states have call predecessors, (2540), 1995 states have call successors, (2540) [2021-11-13 02:41:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 17249 transitions. [2021-11-13 02:41:46,675 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 17249 transitions. Word has length 180 [2021-11-13 02:41:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:46,676 INFO L470 AbstractCegarLoop]: Abstraction has 10850 states and 17249 transitions. [2021-11-13 02:41:46,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 02:41:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 17249 transitions. [2021-11-13 02:41:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 02:41:46,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:46,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:46,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:46,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:46,905 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1334383390, now seen corresponding path program 1 times [2021-11-13 02:41:46,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:46,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499035264] [2021-11-13 02:41:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:46,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:46,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:46,908 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:46,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-13 02:41:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:41:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 02:41:47,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 02:41:48,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:48,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499035264] [2021-11-13 02:41:48,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499035264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:48,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:48,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-13 02:41:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327434297] [2021-11-13 02:41:48,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:41:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:41:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:41:48,671 INFO L87 Difference]: Start difference. First operand 10850 states and 17249 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-13 02:41:50,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:52,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:57,371 INFO L93 Difference]: Finished difference Result 21777 states and 34823 transitions. [2021-11-13 02:41:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 02:41:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-13 02:41:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:57,425 INFO L225 Difference]: With dead ends: 21777 [2021-11-13 02:41:57,425 INFO L226 Difference]: Without dead ends: 11912 [2021-11-13 02:41:57,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:41:57,459 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 3853 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 1074 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7222.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3932 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.00ms SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7770.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:57,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3932 Valid, 2043 Invalid, 3932 Unknown, 0 Unchecked, 25.00ms Time], IncrementalHoareTripleChecker [1074 Valid, 2856 Invalid, 2 Unknown, 0 Unchecked, 7770.44ms Time] [2021-11-13 02:41:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11912 states. [2021-11-13 02:41:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11912 to 11214. [2021-11-13 02:41:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 8496 states have (on average 1.5379001883239172) internal successors, (13066), 8888 states have internal predecessors, (13066), 2037 states have call successors, (2037), 571 states have call predecessors, (2037), 680 states have return successors, (2626), 2015 states have call predecessors, (2626), 2033 states have call successors, (2626) [2021-11-13 02:41:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 17729 transitions. [2021-11-13 02:41:58,299 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 17729 transitions. Word has length 185 [2021-11-13 02:41:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:58,300 INFO L470 AbstractCegarLoop]: Abstraction has 11214 states and 17729 transitions. [2021-11-13 02:41:58,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-13 02:41:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 17729 transitions. [2021-11-13 02:41:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 02:41:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:58,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:58,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:58,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,531 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2071258, now seen corresponding path program 1 times [2021-11-13 02:41:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:58,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851510379] [2021-11-13 02:41:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:58,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:58,533 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:58,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-13 02:41:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:59,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:41:59,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:41:59,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:42:00,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:00,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851510379] [2021-11-13 02:42:00,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851510379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:00,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:00,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:42:00,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536303956] [2021-11-13 02:42:00,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:00,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:42:00,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:42:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:42:00,683 INFO L87 Difference]: Start difference. First operand 11214 states and 17729 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-13 02:42:02,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:04,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:13,304 INFO L93 Difference]: Finished difference Result 29937 states and 47811 transitions. [2021-11-13 02:42:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:42:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-13 02:42:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:13,390 INFO L225 Difference]: With dead ends: 29937 [2021-11-13 02:42:13,391 INFO L226 Difference]: Without dead ends: 19705 [2021-11-13 02:42:13,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:42:13,421 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 3229 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 906 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9975.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3303 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 6795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.48ms SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10848.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:13,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3303 Valid, 2947 Invalid, 6795 Unknown, 0 Unchecked, 32.48ms Time], IncrementalHoareTripleChecker [906 Valid, 5887 Invalid, 2 Unknown, 0 Unchecked, 10848.38ms Time] [2021-11-13 02:42:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19705 states. [2021-11-13 02:42:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19705 to 19625. [2021-11-13 02:42:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19625 states, 14849 states have (on average 1.5446831436460369) internal successors, (22937), 15503 states have internal predecessors, (22937), 3629 states have call successors, (3629), 1032 states have call predecessors, (3629), 1146 states have return successors, (4577), 3582 states have call predecessors, (4577), 3625 states have call successors, (4577) [2021-11-13 02:42:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19625 states to 19625 states and 31143 transitions. [2021-11-13 02:42:14,760 INFO L78 Accepts]: Start accepts. Automaton has 19625 states and 31143 transitions. Word has length 190 [2021-11-13 02:42:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:14,761 INFO L470 AbstractCegarLoop]: Abstraction has 19625 states and 31143 transitions. [2021-11-13 02:42:14,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-13 02:42:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19625 states and 31143 transitions. [2021-11-13 02:42:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 02:42:14,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:14,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:14,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:14,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:14,994 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1384132136, now seen corresponding path program 1 times [2021-11-13 02:42:14,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:14,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549713533] [2021-11-13 02:42:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:14,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:14,997 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:15,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-13 02:42:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:42:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:42:16,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:42:17,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:17,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549713533] [2021-11-13 02:42:17,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549713533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:17,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-13 02:42:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461743191] [2021-11-13 02:42:17,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 02:42:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 02:42:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:42:17,229 INFO L87 Difference]: Start difference. First operand 19625 states and 31143 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-13 02:42:19,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:21,256 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:23,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:25,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:37,629 INFO L93 Difference]: Finished difference Result 52206 states and 85403 transitions. [2021-11-13 02:42:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 02:42:37,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-13 02:42:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:37,865 INFO L225 Difference]: With dead ends: 52206 [2021-11-13 02:42:37,865 INFO L226 Difference]: Without dead ends: 31103 [2021-11-13 02:42:37,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:42:37,952 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 2600 mSDsluCounter, 3391 mSDsCounter, 0 mSdLazyCounter, 8341 mSolverCounterSat, 717 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16624.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 4418 SdHoareTripleChecker+Invalid, 9062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.31ms SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 8341 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17836.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:37,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 4418 Invalid, 9062 Unknown, 0 Unchecked, 41.31ms Time], IncrementalHoareTripleChecker [717 Valid, 8341 Invalid, 4 Unknown, 0 Unchecked, 17836.09ms Time] [2021-11-13 02:42:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31103 states. [2021-11-13 02:42:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31103 to 29443. [2021-11-13 02:42:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29443 states, 22257 states have (on average 1.5364604394123198) internal successors, (34197), 23296 states have internal predecessors, (34197), 5445 states have call successors, (5445), 1583 states have call predecessors, (5445), 1740 states have return successors, (7035), 5288 states have call predecessors, (7035), 5441 states have call successors, (7035) [2021-11-13 02:42:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29443 states to 29443 states and 46677 transitions. [2021-11-13 02:42:40,378 INFO L78 Accepts]: Start accepts. Automaton has 29443 states and 46677 transitions. Word has length 190 [2021-11-13 02:42:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 29443 states and 46677 transitions. [2021-11-13 02:42:40,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-13 02:42:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 29443 states and 46677 transitions. [2021-11-13 02:42:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-13 02:42:40,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:40,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:40,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:40,597 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1957591905, now seen corresponding path program 1 times [2021-11-13 02:42:40,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:40,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569277510] [2021-11-13 02:42:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:40,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:40,601 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:40,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-13 02:42:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:42:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:41,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:42,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:42,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569277510] [2021-11-13 02:42:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569277510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:42,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1250889366] [2021-11-13 02:42:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:42,406 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:42:42,407 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:42:42,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-13 02:42:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:42:42,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:42:43,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:42:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1250889366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:43,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:42:43,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:42:43,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841597980] [2021-11-13 02:42:43,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:43,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:42:43,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:42:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:42:43,575 INFO L87 Difference]: Start difference. First operand 29443 states and 46677 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-13 02:42:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:46,883 INFO L93 Difference]: Finished difference Result 87709 states and 140339 transitions. [2021-11-13 02:42:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:42:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-13 02:42:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:47,597 INFO L225 Difference]: With dead ends: 87709 [2021-11-13 02:42:47,598 INFO L226 Difference]: Without dead ends: 58345 [2021-11-13 02:42:47,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:42:47,715 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 767 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.89ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:47,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 2207 Invalid, 10 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 47.89ms Time] [2021-11-13 02:42:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58345 states. [2021-11-13 02:42:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58345 to 57647. [2021-11-13 02:42:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57647 states, 43614 states have (on average 1.5315495024533408) internal successors, (66797), 45640 states have internal predecessors, (66797), 10582 states have call successors, (10582), 3134 states have call predecessors, (10582), 3450 states have return successors, (14392), 10322 states have call predecessors, (14392), 10578 states have call successors, (14392) [2021-11-13 02:42:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57647 states to 57647 states and 91771 transitions. [2021-11-13 02:42:52,695 INFO L78 Accepts]: Start accepts. Automaton has 57647 states and 91771 transitions. Word has length 191 [2021-11-13 02:42:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:52,695 INFO L470 AbstractCegarLoop]: Abstraction has 57647 states and 91771 transitions. [2021-11-13 02:42:52,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-13 02:42:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57647 states and 91771 transitions. [2021-11-13 02:42:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 02:42:52,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:52,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:52,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:52,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:53,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:53,107 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 555666812, now seen corresponding path program 1 times [2021-11-13 02:42:53,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:53,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337098928] [2021-11-13 02:42:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:53,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:53,109 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:53,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-13 02:42:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:42:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:54,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:55,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:55,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337098928] [2021-11-13 02:42:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337098928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:55,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [979765949] [2021-11-13 02:42:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:55,053 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:42:55,053 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:42:55,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-13 02:42:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:42:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:55,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:56,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [979765949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:56,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486666696] [2021-11-13 02:42:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:56,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:42:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:42:56,576 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:42:56,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-13 02:42:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:42:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:57,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:42:58,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486666696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:58,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:42:58,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-13 02:42:58,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060125394] [2021-11-13 02:42:58,096 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:42:58,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:42:58,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:42:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:42:58,097 INFO L87 Difference]: Start difference. First operand 57647 states and 91771 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-13 02:43:00,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:02,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:04,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:11,982 INFO L93 Difference]: Finished difference Result 88331 states and 140544 transitions. [2021-11-13 02:43:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:43:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-13 02:43:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:12,311 INFO L225 Difference]: With dead ends: 88331 [2021-11-13 02:43:12,311 INFO L226 Difference]: Without dead ends: 60119 [2021-11-13 02:43:12,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:43:12,569 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1643 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 3660 mSolverCounterSat, 422 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9528.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 4085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.44ms SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 3660 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10096.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:12,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 2272 Invalid, 4085 Unknown, 0 Unchecked, 20.44ms Time], IncrementalHoareTripleChecker [422 Valid, 3660 Invalid, 3 Unknown, 0 Unchecked, 10096.98ms Time] [2021-11-13 02:43:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60119 states. [2021-11-13 02:43:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60119 to 58323. [2021-11-13 02:43:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58323 states, 44086 states have (on average 1.5252914757519394) internal successors, (67244), 46276 states have internal predecessors, (67244), 10630 states have call successors, (10630), 3142 states have call predecessors, (10630), 3606 states have return successors, (14348), 10354 states have call predecessors, (14348), 10626 states have call successors, (14348) [2021-11-13 02:43:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58323 states to 58323 states and 92222 transitions. [2021-11-13 02:43:17,006 INFO L78 Accepts]: Start accepts. Automaton has 58323 states and 92222 transitions. Word has length 192 [2021-11-13 02:43:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:17,007 INFO L470 AbstractCegarLoop]: Abstraction has 58323 states and 92222 transitions. [2021-11-13 02:43:17,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-13 02:43:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 58323 states and 92222 transitions. [2021-11-13 02:43:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 02:43:17,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:17,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:43:17,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-13 02:43:17,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:17,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-13 02:43:17,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:17,612 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1731133033, now seen corresponding path program 1 times [2021-11-13 02:43:17,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:17,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409525461] [2021-11-13 02:43:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:17,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:17,614 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:17,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a66985-c7d9-405d-aeb0-4d25d51f0390/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-13 02:43:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:43:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:43:18,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:43:19,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:19,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409525461] [2021-11-13 02:43:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409525461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:19,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 02:43:19,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415161724] [2021-11-13 02:43:19,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:43:19,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:43:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:43:19,086 INFO L87 Difference]: Start difference. First operand 58323 states and 92222 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 02:43:21,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:28,692 INFO L93 Difference]: Finished difference Result 140515 states and 221836 transitions. [2021-11-13 02:43:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:43:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 195 [2021-11-13 02:43:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:29,182 INFO L225 Difference]: With dead ends: 140515 [2021-11-13 02:43:29,182 INFO L226 Difference]: Without dead ends: 83871 [2021-11-13 02:43:29,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:43:29,381 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 456 mSDsluCounter, 4291 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2845.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 5306 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.10ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2983.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:29,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 5306 Invalid, 536 Unknown, 0 Unchecked, 11.10ms Time], IncrementalHoareTripleChecker [17 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 2983.11ms Time] [2021-11-13 02:43:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83871 states.