./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:54,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:54,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:54,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:54,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:54,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:54,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:54,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:54,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:54,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:54,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:54,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:54,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:54,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:54,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:54,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:54,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:54,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:54,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:54,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:54,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:54,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:54,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:54,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:54,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:54,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:54,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:54,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:54,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:54,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:54,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:54,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:54,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:54,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:54,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:54,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:54,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:54,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:54,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:54,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:54,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:07:54,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:54,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:54,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:54,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:54,337 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:54,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:54,338 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:54,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:54,338 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:54,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:54,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:54,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:54,339 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:54,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:54,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:54,340 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:54,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:54,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:54,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:54,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:54,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:54,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:54,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:54,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:54,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:54,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:54,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:54,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:54,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:54,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:54,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:54,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:54,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:54,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:54,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:54,345 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:54,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:54,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:54,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:54,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:54,346 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2021-11-12 23:07:54,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:54,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:54,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:54,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:54,637 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:54,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2021-11-12 23:07:54,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/1b01e90f3/c40703a4e4144fd699e758edbc90624b/FLAG5a4ce168e [2021-11-12 23:07:55,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:55,348 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2021-11-12 23:07:55,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/1b01e90f3/c40703a4e4144fd699e758edbc90624b/FLAG5a4ce168e [2021-11-12 23:07:55,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/1b01e90f3/c40703a4e4144fd699e758edbc90624b [2021-11-12 23:07:55,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:55,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:55,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:55,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:55,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:55,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:55" (1/1) ... [2021-11-12 23:07:55,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15419d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:55, skipping insertion in model container [2021-11-12 23:07:55,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:55" (1/1) ... [2021-11-12 23:07:55,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:56,148 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2021-11-12 23:07:56,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:56,359 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:07:56,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@495aac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:56, skipping insertion in model container [2021-11-12 23:07:56,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:56,360 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:07:56,362 INFO L158 Benchmark]: Toolchain (without parser) took 822.80ms. Allocated memory is still 113.2MB. Free memory was 73.0MB in the beginning and 73.7MB in the end (delta: -719.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:07:56,363 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:07:56,363 INFO L158 Benchmark]: CACSL2BoogieTranslator took 811.76ms. Allocated memory is still 113.2MB. Free memory was 72.8MB in the beginning and 73.7MB in the end (delta: -914.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:07:56,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 811.76ms. Allocated memory is still 113.2MB. Free memory was 72.8MB in the beginning and 73.7MB in the end (delta: -914.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 880]: 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:58,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:58,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:58,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:58,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:58,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:58,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:58,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:58,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:58,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:58,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:58,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:58,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:58,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:58,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:58,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:58,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:58,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:58,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:58,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:58,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:58,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:58,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:58,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:58,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:58,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:58,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:58,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:58,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:58,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:58,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:58,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:58,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:58,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:58,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:58,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:58,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:58,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:58,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:58,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:58,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:58,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:07:58,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:58,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:58,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:58,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:58,670 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:58,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:58,670 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:58,671 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:58,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:58,671 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:58,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:58,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:58,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:58,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:58,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:58,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:58,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:58,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:58,675 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:07:58,675 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:07:58,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:58,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:58,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:58,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:58,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:58,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:07:58,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:58,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:58,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:58,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:58,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:58,678 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:07:58,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:58,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:58,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:58,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:58,680 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2021-11-12 23:07:59,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:59,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:59,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:59,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:59,073 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:59,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2021-11-12 23:07:59,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/7ad700f86/f7bc8be4c74f4812b6ee1f2db2f56a23/FLAGa69acbc4e [2021-11-12 23:07:59,820 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:59,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2021-11-12 23:07:59,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/7ad700f86/f7bc8be4c74f4812b6ee1f2db2f56a23/FLAGa69acbc4e [2021-11-12 23:08:00,048 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/data/7ad700f86/f7bc8be4c74f4812b6ee1f2db2f56a23 [2021-11-12 23:08:00,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:00,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:00,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:00,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:00,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:00,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:00" (1/1) ... [2021-11-12 23:08:00,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ae86f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:00, skipping insertion in model container [2021-11-12 23:08:00,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:00" (1/1) ... [2021-11-12 23:08:00,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:00,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:00,643 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2021-11-12 23:08:00,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:00,891 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:08:00,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:00,993 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2021-11-12 23:08:01,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:01,112 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:08:01,180 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_3c153453-6f3e-4b4e-b256-772ffe0dbab0/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2021-11-12 23:08:01,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:01,301 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:08:01,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01 WrapperNode [2021-11-12 23:08:01,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:01,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:01,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:08:01,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:08:01,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:01,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:08:01,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:08:01,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:08:01,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:08:01,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:08:01,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:08:01,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:08:01,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:01,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:08:01,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:08:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:08:01,678 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:08:01,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:08:01,679 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:08:01,679 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:08:01,679 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:08:01,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:08:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:08:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:08:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:08:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:08:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:08:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:08:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:08:01,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:08:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:08:01,681 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:08:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:08:01,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:08:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:08:01,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:08:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:08:01,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:08:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:08:01,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:08:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:08:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:08:01,683 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:08:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:08:01,684 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:08:01,684 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:08:01,684 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:08:01,684 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:08:01,685 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:08:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:08:01,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:08:01,685 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:08:01,686 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:08:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 23:08:01,686 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 23:08:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:08:01,686 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:08:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:08:01,687 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:08:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:08:01,687 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:08:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:08:01,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:08:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:08:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:08:05,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:08:05,738 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:08:05,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:05 BoogieIcfgContainer [2021-11-12 23:08:05,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:08:05,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:08:05,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:08:05,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:08:05,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:08:00" (1/3) ... [2021-11-12 23:08:05,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6c58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:05, skipping insertion in model container [2021-11-12 23:08:05,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01" (2/3) ... [2021-11-12 23:08:05,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6c58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:05, skipping insertion in model container [2021-11-12 23:08:05,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:05" (3/3) ... [2021-11-12 23:08:05,755 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product03.cil.c [2021-11-12 23:08:05,765 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:08:05,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:08:05,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:08:05,861 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:08:05,862 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:08:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 426 states have (on average 1.6948356807511737) internal successors, (722), 447 states have internal predecessors, (722), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:08:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:08:05,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:05,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:05,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1217975181, now seen corresponding path program 1 times [2021-11-12 23:08:05,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:05,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157550765] [2021-11-12 23:08:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:05,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:05,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:05,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:08:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:08:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:06,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:07,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:07,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157550765] [2021-11-12 23:08:07,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157550765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:08:07,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077828438] [2021-11-12 23:08:07,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:08:07,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:08:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:08:07,214 INFO L87 Difference]: Start difference. First operand has 545 states, 426 states have (on average 1.6948356807511737) internal successors, (722), 447 states have internal predecessors, (722), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 23:08:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,339 INFO L93 Difference]: Finished difference Result 566 states and 940 transitions. [2021-11-12 23:08:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:08:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2021-11-12 23:08:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,370 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:08:07,370 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:08:07,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:08:07,382 INFO L933 BasicCegarLoop]: 901 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, 901 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 13.59ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:08:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:08:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:08:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 420 states have (on average 1.6928571428571428) internal successors, (711), 439 states have internal predecessors, (711), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 894 transitions. [2021-11-12 23:08:07,516 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 894 transitions. Word has length 102 [2021-11-12 23:08:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,520 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 894 transitions. [2021-11-12 23:08:07,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 23:08:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 894 transitions. [2021-11-12 23:08:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:08:07,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:07,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:07,750 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1257337695, now seen corresponding path program 1 times [2021-11-12 23:08:07,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:07,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142017093] [2021-11-12 23:08:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:07,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:07,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:08:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:08,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:08,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:08,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142017093] [2021-11-12 23:08:08,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142017093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,934 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:08,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:08:08,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944647784] [2021-11-12 23:08:08,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:08,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:08,944 INFO L87 Difference]: Start difference. First operand 537 states and 894 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:08:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,110 INFO L93 Difference]: Finished difference Result 1058 states and 1766 transitions. [2021-11-12 23:08:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 104 [2021-11-12 23:08:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,117 INFO L225 Difference]: With dead ends: 1058 [2021-11-12 23:08:09,118 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:08:09,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:09,125 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 15 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3517 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.47ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3517 Invalid, 36 Unknown, 0 Unchecked, 29.47ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 29.54ms Time] [2021-11-12 23:08:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:08:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:08:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 420 states have (on average 1.6785714285714286) internal successors, (705), 439 states have internal predecessors, (705), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 888 transitions. [2021-11-12 23:08:09,160 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 888 transitions. Word has length 104 [2021-11-12 23:08:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:09,160 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 888 transitions. [2021-11-12 23:08:09,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:08:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 888 transitions. [2021-11-12 23:08:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:08:09,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:09,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:09,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:09,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:09,385 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2037922056, now seen corresponding path program 1 times [2021-11-12 23:08:09,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:09,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039606485] [2021-11-12 23:08:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:09,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:09,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:09,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:08:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:08:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:10,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:10,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:10,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039606485] [2021-11-12 23:08:10,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039606485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:10,624 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:10,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:08:10,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689774815] [2021-11-12 23:08:10,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:08:10,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:08:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:10,626 INFO L87 Difference]: Start difference. First operand 537 states and 888 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:08:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:10,789 INFO L93 Difference]: Finished difference Result 1016 states and 1683 transitions. [2021-11-12 23:08:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 109 [2021-11-12 23:08:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:10,796 INFO L225 Difference]: With dead ends: 1016 [2021-11-12 23:08:10,796 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:08:10,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:08:10,801 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 213 mSDsluCounter, 4354 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 5229 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:10,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 5229 Invalid, 77 Unknown, 0 Unchecked, 13.74ms Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 81.81ms Time] [2021-11-12 23:08:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:08:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:08:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 414 states have (on average 1.671497584541063) internal successors, (692), 433 states have internal predecessors, (692), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 875 transitions. [2021-11-12 23:08:10,850 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 875 transitions. Word has length 109 [2021-11-12 23:08:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,851 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 875 transitions. [2021-11-12 23:08:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:08:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 875 transitions. [2021-11-12 23:08:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:08:10,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:10,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:11,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:11,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1152554182, now seen corresponding path program 1 times [2021-11-12 23:08:11,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:11,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298636861] [2021-11-12 23:08:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:11,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:11,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:11,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:08:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:11,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:12,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:12,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298636861] [2021-11-12 23:08:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298636861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:12,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:12,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:08:12,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610532252] [2021-11-12 23:08:12,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:12,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:12,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:12,170 INFO L87 Difference]: Start difference. First operand 531 states and 875 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:08:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:12,365 INFO L93 Difference]: Finished difference Result 1019 states and 1684 transitions. [2021-11-12 23:08:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 110 [2021-11-12 23:08:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:12,372 INFO L225 Difference]: With dead ends: 1019 [2021-11-12 23:08:12,372 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:08:12,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:12,382 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 206 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.24ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:12,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1672 Invalid, 144 Unknown, 0 Unchecked, 6.24ms Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 124.47ms Time] [2021-11-12 23:08:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:08:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:08:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 414 states have (on average 1.6135265700483092) internal successors, (668), 433 states have internal predecessors, (668), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 851 transitions. [2021-11-12 23:08:12,412 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 851 transitions. Word has length 110 [2021-11-12 23:08:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:12,413 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 851 transitions. [2021-11-12 23:08:12,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:08:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 851 transitions. [2021-11-12 23:08:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:08:12,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:12,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:12,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:08:12,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:12,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1329589909, now seen corresponding path program 1 times [2021-11-12 23:08:12,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:12,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114704220] [2021-11-12 23:08:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:12,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:12,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:12,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:12,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:08:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:08:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:13,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:13,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114704220] [2021-11-12 23:08:13,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114704220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:13,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:13,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:08:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717425592] [2021-11-12 23:08:13,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:13,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:08:13,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:08:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:13,884 INFO L87 Difference]: Start difference. First operand 531 states and 851 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:08:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:14,016 INFO L93 Difference]: Finished difference Result 1010 states and 1646 transitions. [2021-11-12 23:08:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:08:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 112 [2021-11-12 23:08:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:14,023 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 23:08:14,023 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 23:08:14,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:14,027 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 89 mSDsluCounter, 4933 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5772 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:14,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5772 Invalid, 60 Unknown, 0 Unchecked, 10.35ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 77.20ms Time] [2021-11-12 23:08:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 23:08:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 23:08:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 393 states have (on average 1.6361323155216285) internal successors, (643), 412 states have internal predecessors, (643), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 826 transitions. [2021-11-12 23:08:14,052 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 826 transitions. Word has length 112 [2021-11-12 23:08:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 826 transitions. [2021-11-12 23:08:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:08:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 826 transitions. [2021-11-12 23:08:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:08:14,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:14,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:14,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:08:14,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:14,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -655051595, now seen corresponding path program 1 times [2021-11-12 23:08:14,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:14,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214508380] [2021-11-12 23:08:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:14,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:14,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:14,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:08:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:08:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:15,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:15,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:15,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214508380] [2021-11-12 23:08:15,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214508380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:15,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:15,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:08:15,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955847551] [2021-11-12 23:08:15,647 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:15,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:08:15,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:08:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:08:15,649 INFO L87 Difference]: Start difference. First operand 510 states and 826 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:08:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:15,860 INFO L93 Difference]: Finished difference Result 983 states and 1610 transitions. [2021-11-12 23:08:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 115 [2021-11-12 23:08:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:15,866 INFO L225 Difference]: With dead ends: 983 [2021-11-12 23:08:15,866 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 23:08:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:08:15,870 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 30 mSDsluCounter, 7265 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8076 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:15,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 8076 Invalid, 116 Unknown, 0 Unchecked, 14.61ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 127.76ms Time] [2021-11-12 23:08:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 23:08:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-12 23:08:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 393 states have (on average 1.633587786259542) internal successors, (642), 412 states have internal predecessors, (642), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:08:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 825 transitions. [2021-11-12 23:08:15,895 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 825 transitions. Word has length 115 [2021-11-12 23:08:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:15,895 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 825 transitions. [2021-11-12 23:08:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:08:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 825 transitions. [2021-11-12 23:08:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:08:15,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:15,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:15,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:16,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:16,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash -565790203, now seen corresponding path program 1 times [2021-11-12 23:08:16,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:16,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575708591] [2021-11-12 23:08:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:16,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:16,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:08:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:16,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:17,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:17,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575708591] [2021-11-12 23:08:17,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575708591] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:17,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:17,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:08:17,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054917200] [2021-11-12 23:08:17,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:17,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:17,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:17,451 INFO L87 Difference]: Start difference. First operand 510 states and 825 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:19,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:21,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:22,411 INFO L93 Difference]: Finished difference Result 979 states and 1627 transitions. [2021-11-12 23:08:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-11-12 23:08:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:22,417 INFO L225 Difference]: With dead ends: 979 [2021-11-12 23:08:22,417 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 23:08:22,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:22,422 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 761 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4744.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.60ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4885.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:22,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 2048 Invalid, 429 Unknown, 0 Unchecked, 10.60ms Time], IncrementalHoareTripleChecker [16 Valid, 411 Invalid, 2 Unknown, 0 Unchecked, 4885.93ms Time] [2021-11-12 23:08:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 23:08:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-12 23:08:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 396 states have (on average 1.628787878787879) internal successors, (645), 415 states have internal predecessors, (645), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (90), 87 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-12 23:08:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 829 transitions. [2021-11-12 23:08:22,457 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 829 transitions. Word has length 116 [2021-11-12 23:08:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:22,457 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 829 transitions. [2021-11-12 23:08:22,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 829 transitions. [2021-11-12 23:08:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:08:22,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:22,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:22,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:22,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:22,684 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1525387195, now seen corresponding path program 1 times [2021-11-12 23:08:22,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:22,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281231148] [2021-11-12 23:08:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:22,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:22,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:22,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:08:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:23,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:23,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:24,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:24,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281231148] [2021-11-12 23:08:24,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281231148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:24,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:24,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:08:24,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504765504] [2021-11-12 23:08:24,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:24,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:24,014 INFO L87 Difference]: Start difference. First operand 514 states and 829 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:26,037 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:28,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:28,854 INFO L93 Difference]: Finished difference Result 988 states and 1634 transitions. [2021-11-12 23:08:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-12 23:08:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:28,861 INFO L225 Difference]: With dead ends: 988 [2021-11-12 23:08:28,861 INFO L226 Difference]: Without dead ends: 519 [2021-11-12 23:08:28,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:28,867 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 774 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4638.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.92ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4772.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:28,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2049 Invalid, 431 Unknown, 0 Unchecked, 8.92ms Time], IncrementalHoareTripleChecker [14 Valid, 415 Invalid, 2 Unknown, 0 Unchecked, 4772.83ms Time] [2021-11-12 23:08:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-12 23:08:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-12 23:08:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 400 states have (on average 1.6225) internal successors, (649), 419 states have internal predecessors, (649), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (91), 87 states have call predecessors, (91), 89 states have call successors, (91) [2021-11-12 23:08:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 834 transitions. [2021-11-12 23:08:28,893 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 834 transitions. Word has length 118 [2021-11-12 23:08:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:28,894 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 834 transitions. [2021-11-12 23:08:28,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 834 transitions. [2021-11-12 23:08:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:08:28,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:28,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:28,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:29,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:29,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1323665211, now seen corresponding path program 1 times [2021-11-12 23:08:29,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:29,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626483136] [2021-11-12 23:08:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:29,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:29,118 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:29,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:08:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:30,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:30,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626483136] [2021-11-12 23:08:30,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626483136] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:30,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:30,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:08:30,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44824507] [2021-11-12 23:08:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:30,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:30,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:30,508 INFO L87 Difference]: Start difference. First operand 519 states and 834 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:32,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:34,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:35,371 INFO L93 Difference]: Finished difference Result 999 states and 1643 transitions. [2021-11-12 23:08:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-12 23:08:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:35,377 INFO L225 Difference]: With dead ends: 999 [2021-11-12 23:08:35,377 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 23:08:35,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:35,381 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 774 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4683.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4790.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:35,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2049 Invalid, 430 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [12 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 4790.97ms Time] [2021-11-12 23:08:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 23:08:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-12 23:08:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.614814814814815) internal successors, (654), 424 states have internal predecessors, (654), 94 states have call successors, (94), 26 states have call predecessors, (94), 25 states have return successors, (92), 87 states have call predecessors, (92), 89 states have call successors, (92) [2021-11-12 23:08:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 840 transitions. [2021-11-12 23:08:35,406 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 840 transitions. Word has length 120 [2021-11-12 23:08:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 840 transitions. [2021-11-12 23:08:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 840 transitions. [2021-11-12 23:08:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:08:35,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:35,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:35,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:35,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:35,638 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash 806317683, now seen corresponding path program 1 times [2021-11-12 23:08:35,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:35,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103034219] [2021-11-12 23:08:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:35,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:35,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:35,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:35,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:08:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:36,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:37,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:37,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103034219] [2021-11-12 23:08:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103034219] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:37,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:37,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:08:37,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682843416] [2021-11-12 23:08:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:37,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:37,122 INFO L87 Difference]: Start difference. First operand 525 states and 840 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:39,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:41,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:42,027 INFO L93 Difference]: Finished difference Result 1012 states and 1654 transitions. [2021-11-12 23:08:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-12 23:08:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:42,032 INFO L225 Difference]: With dead ends: 1012 [2021-11-12 23:08:42,033 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 23:08:42,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:42,036 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 763 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4712.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.99ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4839.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:42,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 2049 Invalid, 429 Unknown, 0 Unchecked, 7.99ms Time], IncrementalHoareTripleChecker [10 Valid, 417 Invalid, 2 Unknown, 0 Unchecked, 4839.08ms Time] [2021-11-12 23:08:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 23:08:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-11-12 23:08:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 411 states have (on average 1.6058394160583942) internal successors, (660), 430 states have internal predecessors, (660), 94 states have call successors, (94), 27 states have call predecessors, (94), 26 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-12 23:08:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 847 transitions. [2021-11-12 23:08:42,060 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 847 transitions. Word has length 122 [2021-11-12 23:08:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:42,061 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 847 transitions. [2021-11-12 23:08:42,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 847 transitions. [2021-11-12 23:08:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:08:42,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:42,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:42,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:42,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:42,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2055363109, now seen corresponding path program 1 times [2021-11-12 23:08:42,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:42,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967462345] [2021-11-12 23:08:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:42,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:42,284 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:08:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:43,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:43,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:43,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967462345] [2021-11-12 23:08:43,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967462345] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:43,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:43,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 23:08:43,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036277788] [2021-11-12 23:08:43,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:43,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:43,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:43,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:43,610 INFO L87 Difference]: Start difference. First operand 532 states and 847 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:45,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:47,655 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 [] [2021-11-12 23:08:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:48,596 INFO L93 Difference]: Finished difference Result 1021 states and 1656 transitions. [2021-11-12 23:08:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:48,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-11-12 23:08:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:48,605 INFO L225 Difference]: With dead ends: 1021 [2021-11-12 23:08:48,605 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 23:08:48,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:48,609 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 775 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4751.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.73ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4899.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:48,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2048 Invalid, 425 Unknown, 0 Unchecked, 7.73ms Time], IncrementalHoareTripleChecker [19 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 4899.28ms Time] [2021-11-12 23:08:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 23:08:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-12 23:08:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 412 states have (on average 1.604368932038835) internal successors, (661), 432 states have internal predecessors, (661), 94 states have call successors, (94), 27 states have call predecessors, (94), 27 states have return successors, (94), 87 states have call predecessors, (94), 89 states have call successors, (94) [2021-11-12 23:08:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 849 transitions. [2021-11-12 23:08:48,641 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 849 transitions. Word has length 124 [2021-11-12 23:08:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:48,641 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 849 transitions. [2021-11-12 23:08:48,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 849 transitions. [2021-11-12 23:08:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:08:48,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:48,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:48,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:48,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:48,870 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash -100735611, now seen corresponding path program 1 times [2021-11-12 23:08:48,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:48,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740968144] [2021-11-12 23:08:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:48,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:48,873 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:48,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:08:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:08:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:08:49,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:08:50,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740968144] [2021-11-12 23:08:50,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740968144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186230982] [2021-11-12 23:08:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:50,941 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:50,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:50,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:50,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:08:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:51,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:08:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:08:51,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:08:51,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186230982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:51,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:51,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 23:08:51,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140332881] [2021-11-12 23:08:51,931 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:51,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:51,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:08:51,932 INFO L87 Difference]: Start difference. First operand 534 states and 849 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:53,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:54,024 INFO L93 Difference]: Finished difference Result 1507 states and 2456 transitions. [2021-11-12 23:08:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-11-12 23:08:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:54,035 INFO L225 Difference]: With dead ends: 1507 [2021-11-12 23:08:54,035 INFO L226 Difference]: Without dead ends: 1018 [2021-11-12 23:08:54,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:08:54,039 INFO L933 BasicCegarLoop]: 1474 mSDtfsCounter, 769 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2028.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.62ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2044.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:54,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 2294 Invalid, 9 Unknown, 0 Unchecked, 5.62ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2044.53ms Time] [2021-11-12 23:08:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-12 23:08:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 998. [2021-11-12 23:08:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 773 states have (on average 1.628719275549806) internal successors, (1259), 807 states have internal predecessors, (1259), 174 states have call successors, (174), 48 states have call predecessors, (174), 50 states have return successors, (185), 168 states have call predecessors, (185), 169 states have call successors, (185) [2021-11-12 23:08:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1618 transitions. [2021-11-12 23:08:54,090 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1618 transitions. Word has length 124 [2021-11-12 23:08:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:54,090 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1618 transitions. [2021-11-12 23:08:54,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:08:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1618 transitions. [2021-11-12 23:08:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:08:54,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:54,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:54,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:54,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:54,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:54,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1822492423, now seen corresponding path program 1 times [2021-11-12 23:08:54,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:54,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486546414] [2021-11-12 23:08:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:54,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:54,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:54,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:08:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:54,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:08:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:08:55,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:08:56,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:56,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486546414] [2021-11-12 23:08:56,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486546414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:56,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1051563891] [2021-11-12 23:08:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:56,415 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:56,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:08:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:08:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:08:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1051563891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:57,839 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:57,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [11, 10] total 24 [2021-11-12 23:08:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73782756] [2021-11-12 23:08:57,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:57,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:08:57,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:08:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:57,842 INFO L87 Difference]: Start difference. First operand 998 states and 1618 transitions. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 8 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-12 23:08:59,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:01,879 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:05,067 INFO L93 Difference]: Finished difference Result 2593 states and 4213 transitions. [2021-11-12 23:09:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:05,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 8 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 124 [2021-11-12 23:09:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:05,084 INFO L225 Difference]: With dead ends: 2593 [2021-11-12 23:09:05,085 INFO L226 Difference]: Without dead ends: 1640 [2021-11-12 23:09:05,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:09:05,090 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 1873 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 651 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6566.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1928 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.07ms SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7023.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:05,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1928 Valid, 2241 Invalid, 2771 Unknown, 0 Unchecked, 25.07ms Time], IncrementalHoareTripleChecker [651 Valid, 2118 Invalid, 2 Unknown, 0 Unchecked, 7023.78ms Time] [2021-11-12 23:09:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-12 23:09:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1591. [2021-11-12 23:09:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1179 states have (on average 1.5767599660729432) internal successors, (1859), 1242 states have internal predecessors, (1859), 333 states have call successors, (333), 70 states have call predecessors, (333), 78 states have return successors, (364), 326 states have call predecessors, (364), 328 states have call successors, (364) [2021-11-12 23:09:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2556 transitions. [2021-11-12 23:09:05,186 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2556 transitions. Word has length 124 [2021-11-12 23:09:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:05,187 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2556 transitions. [2021-11-12 23:09:05,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 8 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-12 23:09:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2556 transitions. [2021-11-12 23:09:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:09:05,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:05,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:05,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:05,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:05,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:05,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 561575173, now seen corresponding path program 1 times [2021-11-12 23:09:05,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:05,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448401117] [2021-11-12 23:09:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:05,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:05,598 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:09:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:09:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:09:06,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:09:07,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:07,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448401117] [2021-11-12 23:09:07,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448401117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:07,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [114274007] [2021-11-12 23:09:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:07,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:07,464 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:07,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:09:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:09:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:08,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [114274007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:08,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:08,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:09:08,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588979389] [2021-11-12 23:09:08,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:08,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:08,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:08,558 INFO L87 Difference]: Start difference. First operand 1591 states and 2556 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:10,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:12,815 INFO L93 Difference]: Finished difference Result 5218 states and 8601 transitions. [2021-11-12 23:09:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 124 [2021-11-12 23:09:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:12,860 INFO L225 Difference]: With dead ends: 5218 [2021-11-12 23:09:12,860 INFO L226 Difference]: Without dead ends: 3672 [2021-11-12 23:09:12,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:12,871 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2989 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 734 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3712.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.30ms SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4036.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:12,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 1278 Invalid, 1546 Unknown, 0 Unchecked, 14.30ms Time], IncrementalHoareTripleChecker [734 Valid, 811 Invalid, 1 Unknown, 0 Unchecked, 4036.38ms Time] [2021-11-12 23:09:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-12 23:09:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3448. [2021-11-12 23:09:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 2504 states have (on average 1.5774760383386581) internal successors, (3950), 2653 states have internal predecessors, (3950), 780 states have call successors, (780), 135 states have call predecessors, (780), 163 states have return successors, (943), 775 states have call predecessors, (943), 775 states have call successors, (943) [2021-11-12 23:09:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 5673 transitions. [2021-11-12 23:09:13,202 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 5673 transitions. Word has length 124 [2021-11-12 23:09:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:13,203 INFO L470 AbstractCegarLoop]: Abstraction has 3448 states and 5673 transitions. [2021-11-12 23:09:13,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 5673 transitions. [2021-11-12 23:09:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:09:13,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:13,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:13,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:13,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-12 23:09:13,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:13,623 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash 228826434, now seen corresponding path program 1 times [2021-11-12 23:09:13,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:13,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098296973] [2021-11-12 23:09:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:13,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:13,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:13,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:09:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:14,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:09:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:09:14,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:09:15,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:15,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098296973] [2021-11-12 23:09:15,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098296973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:15,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522101882] [2021-11-12 23:09:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:15,809 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:15,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:15,811 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:09:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:16,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:09:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:16,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:17,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522101882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:17,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:17,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:09:17,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372285582] [2021-11-12 23:09:17,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:17,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:17,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:17,255 INFO L87 Difference]: Start difference. First operand 3448 states and 5673 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:19,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:21,925 INFO L93 Difference]: Finished difference Result 11633 states and 19774 transitions. [2021-11-12 23:09:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 125 [2021-11-12 23:09:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:22,035 INFO L225 Difference]: With dead ends: 11633 [2021-11-12 23:09:22,036 INFO L226 Difference]: Without dead ends: 8230 [2021-11-12 23:09:22,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:22,062 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 1814 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 419 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3870.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.94ms SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4192.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:22,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1889 Valid, 1478 Invalid, 1329 Unknown, 0 Unchecked, 11.94ms Time], IncrementalHoareTripleChecker [419 Valid, 909 Invalid, 1 Unknown, 0 Unchecked, 4192.23ms Time] [2021-11-12 23:09:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-11-12 23:09:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 7751. [2021-11-12 23:09:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 5501 states have (on average 1.5731685148154881) internal successors, (8654), 5864 states have internal predecessors, (8654), 1902 states have call successors, (1902), 265 states have call predecessors, (1902), 347 states have return successors, (2589), 1909 states have call predecessors, (2589), 1897 states have call successors, (2589) [2021-11-12 23:09:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 13145 transitions. [2021-11-12 23:09:22,890 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 13145 transitions. Word has length 125 [2021-11-12 23:09:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 7751 states and 13145 transitions. [2021-11-12 23:09:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 13145 transitions. [2021-11-12 23:09:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:09:22,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:22,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:22,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:23,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:23,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:23,303 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1496445977, now seen corresponding path program 1 times [2021-11-12 23:09:23,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:23,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478335660] [2021-11-12 23:09:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:23,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:23,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:23,307 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:23,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:09:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:09:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:09:24,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:09:25,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:25,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478335660] [2021-11-12 23:09:25,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478335660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:25,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079473722] [2021-11-12 23:09:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:25,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:25,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:25,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:09:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:09:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:26,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:26,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1079473722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:26,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:26,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:09:26,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305744366] [2021-11-12 23:09:26,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:26,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:26,880 INFO L87 Difference]: Start difference. First operand 7751 states and 13145 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:28,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:31,979 INFO L93 Difference]: Finished difference Result 26716 states and 47447 transitions. [2021-11-12 23:09:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 126 [2021-11-12 23:09:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:32,175 INFO L225 Difference]: With dead ends: 26716 [2021-11-12 23:09:32,175 INFO L226 Difference]: Without dead ends: 19010 [2021-11-12 23:09:32,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:32,234 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 2971 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 750 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3728.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3045 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.20ms SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4083.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:32,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3045 Valid, 1230 Invalid, 1557 Unknown, 0 Unchecked, 12.20ms Time], IncrementalHoareTripleChecker [750 Valid, 806 Invalid, 1 Unknown, 0 Unchecked, 4083.03ms Time] [2021-11-12 23:09:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19010 states. [2021-11-12 23:09:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19010 to 18018. [2021-11-12 23:09:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18018 states, 12480 states have (on average 1.566025641025641) internal successors, (19544), 13383 states have internal predecessors, (19544), 4786 states have call successors, (4786), 525 states have call predecessors, (4786), 751 states have return successors, (7461), 4841 states have call predecessors, (7461), 4781 states have call successors, (7461) [2021-11-12 23:09:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18018 states to 18018 states and 31791 transitions. [2021-11-12 23:09:34,358 INFO L78 Accepts]: Start accepts. Automaton has 18018 states and 31791 transitions. Word has length 126 [2021-11-12 23:09:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:34,359 INFO L470 AbstractCegarLoop]: Abstraction has 18018 states and 31791 transitions. [2021-11-12 23:09:34,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 18018 states and 31791 transitions. [2021-11-12 23:09:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:09:34,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:34,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:34,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-12 23:09:34,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:34,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:34,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 854688036, now seen corresponding path program 1 times [2021-11-12 23:09:34,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:34,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196975332] [2021-11-12 23:09:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:34,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:34,775 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:09:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:09:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:09:35,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:09:36,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:36,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196975332] [2021-11-12 23:09:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196975332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:36,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [507790923] [2021-11-12 23:09:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:36,875 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:36,876 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:36,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:09:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:09:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:37,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:38,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [507790923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:38,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:38,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:09:38,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584877251] [2021-11-12 23:09:38,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:38,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:38,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:38,094 INFO L87 Difference]: Start difference. First operand 18018 states and 31791 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:40,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:45,296 INFO L93 Difference]: Finished difference Result 63119 states and 119344 transitions. [2021-11-12 23:09:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 127 [2021-11-12 23:09:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:46,160 INFO L225 Difference]: With dead ends: 63119 [2021-11-12 23:09:46,160 INFO L226 Difference]: Without dead ends: 45146 [2021-11-12 23:09:46,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:46,305 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 1786 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 428 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3971.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.60ms SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4300.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:46,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 1487 Invalid, 1333 Unknown, 0 Unchecked, 13.60ms Time], IncrementalHoareTripleChecker [428 Valid, 904 Invalid, 1 Unknown, 0 Unchecked, 4300.12ms Time] [2021-11-12 23:09:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45146 states. [2021-11-12 23:09:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45146 to 43237. [2021-11-12 23:09:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43237 states, 29243 states have (on average 1.557364155524399) internal successors, (45542), 31526 states have internal predecessors, (45542), 12338 states have call successors, (12338), 1045 states have call predecessors, (12338), 1655 states have return successors, (22433), 12561 states have call predecessors, (22433), 12333 states have call successors, (22433) [2021-11-12 23:09:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43237 states to 43237 states and 80313 transitions. [2021-11-12 23:09:51,230 INFO L78 Accepts]: Start accepts. Automaton has 43237 states and 80313 transitions. Word has length 127 [2021-11-12 23:09:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:51,231 INFO L470 AbstractCegarLoop]: Abstraction has 43237 states and 80313 transitions. [2021-11-12 23:09:51,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43237 states and 80313 transitions. [2021-11-12 23:09:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:09:51,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:51,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:51,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:51,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-12 23:09:51,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:51,655 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 725402313, now seen corresponding path program 1 times [2021-11-12 23:09:51,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:51,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445753133] [2021-11-12 23:09:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:51,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:51,658 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:51,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:09:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:09:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:09:52,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:09:53,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:53,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445753133] [2021-11-12 23:09:53,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445753133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:53,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364612883] [2021-11-12 23:09:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:53,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:53,457 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:09:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:09:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:54,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:09:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1364612883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:54,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:54,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:09:54,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289680496] [2021-11-12 23:09:54,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:09:54,658 INFO L87 Difference]: Start difference. First operand 43237 states and 80313 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:09:56,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:05,918 INFO L93 Difference]: Finished difference Result 153110 states and 316832 transitions. [2021-11-12 23:10:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:10:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 128 [2021-11-12 23:10:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:07,685 INFO L225 Difference]: With dead ends: 153110 [2021-11-12 23:10:07,685 INFO L226 Difference]: Without dead ends: 109908 [2021-11-12 23:10:08,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:10:08,293 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 1771 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 431 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3495.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.15ms SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3760.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:08,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 1497 Invalid, 1332 Unknown, 0 Unchecked, 10.15ms Time], IncrementalHoareTripleChecker [431 Valid, 900 Invalid, 1 Unknown, 0 Unchecked, 3760.14ms Time] [2021-11-12 23:10:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109908 states. [2021-11-12 23:10:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109908 to 106852. [2021-11-12 23:10:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106852 states, 70751 states have (on average 1.5479215841472205) internal successors, (109517), 76598 states have internal predecessors, (109517), 32378 states have call successors, (32378), 2081 states have call predecessors, (32378), 3722 states have return successors, (70332), 33152 states have call predecessors, (70332), 32373 states have call successors, (70332) [2021-11-12 23:10:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106852 states to 106852 states and 212227 transitions. [2021-11-12 23:10:20,028 INFO L78 Accepts]: Start accepts. Automaton has 106852 states and 212227 transitions. Word has length 128 [2021-11-12 23:10:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:20,031 INFO L470 AbstractCegarLoop]: Abstraction has 106852 states and 212227 transitions. [2021-11-12 23:10:20,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:10:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 106852 states and 212227 transitions. [2021-11-12 23:10:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:10:20,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:20,071 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:20,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:20,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:20,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:20,492 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash 614782412, now seen corresponding path program 1 times [2021-11-12 23:10:20,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:20,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688013352] [2021-11-12 23:10:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:20,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:20,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:20,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c153453-6f3e-4b4e-b256-772ffe0dbab0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:10:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:10:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 23:10:21,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 23:10:23,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:23,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688013352] [2021-11-12 23:10:23,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688013352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:23,485 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:23,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 23:10:23,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22032697] [2021-11-12 23:10:23,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:23,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:10:23,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:10:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:10:23,487 INFO L87 Difference]: Start difference. First operand 106852 states and 212227 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 12 states have internal predecessors, (140), 6 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 10 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-12 23:10:25,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:27,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:29,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:31,544 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 []