./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.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_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/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_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/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_c18190b6-04ca-4301-81fc-534334b25fd0/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 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:57,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:57,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:57,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:57,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:57,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:57,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:57,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:57,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:57,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:57,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:57,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:57,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:57,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:57,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:57,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:57,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:57,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:57,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:57,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:57,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:57,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:57,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:57,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:57,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:57,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:57,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:57,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:57,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:57,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:57,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:57,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:57,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:57,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:57,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:57,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:57,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:57,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:57,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:57,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:57,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:57,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:08:57,920 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:57,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:57,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:57,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:57,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:57,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:57,922 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:57,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:08:57,929 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:57,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:57,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:08:57,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:08:57,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:57,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:08:57,930 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:08:57,930 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:08:57,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:57,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:08:57,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:08:57,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:57,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:08:57,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:57,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:57,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:57,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:57,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:57,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:57,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:57,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:57,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:57,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:08:57,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:08:57,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:57,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:57,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:57,935 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_c18190b6-04ca-4301-81fc-534334b25fd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 [2021-11-12 23:08:58,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:58,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:58,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:58,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:58,228 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:58,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-12 23:08:58,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/ae474ec94/182fe4a97c9d45818e8c67b76fbebd86/FLAG5da8f7a27 [2021-11-12 23:08:59,119 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:59,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-12 23:08:59,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/ae474ec94/182fe4a97c9d45818e8c67b76fbebd86/FLAG5da8f7a27 [2021-11-12 23:08:59,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/ae474ec94/182fe4a97c9d45818e8c67b76fbebd86 [2021-11-12 23:08:59,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:59,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:59,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:59,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:59,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:59,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:59" (1/1) ... [2021-11-12 23:08:59,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b123121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:59, skipping insertion in model container [2021-11-12 23:08:59,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:59" (1/1) ... [2021-11-12 23:08:59,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:59,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:59,633 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_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-12 23:09:00,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:00,043 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 23:09:00,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b27e169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:00, skipping insertion in model container [2021-11-12 23:09:00,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:00,044 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:09:00,046 INFO L158 Benchmark]: Toolchain (without parser) took 741.66ms. Allocated memory is still 98.6MB. Free memory was 61.3MB in the beginning and 59.4MB in the end (delta: 1.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:09:00,046 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:09:00,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 737.36ms. Allocated memory is still 98.6MB. Free memory was 61.1MB in the beginning and 59.4MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:09:00,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 737.36ms. Allocated memory is still 98.6MB. Free memory was 61.1MB in the beginning and 59.4MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/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_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/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_c18190b6-04ca-4301-81fc-534334b25fd0/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 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:09:02,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:09:02,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:09:02,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:09:02,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:09:02,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:09:02,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:09:02,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:09:02,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:09:02,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:09:02,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:09:02,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:09:02,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:09:02,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:09:02,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:09:02,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:09:02,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:09:02,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:09:02,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:09:02,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:09:02,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:09:02,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:09:02,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:09:02,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:09:02,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:09:02,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:09:02,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:09:02,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:09:02,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:09:02,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:09:02,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:09:02,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:09:02,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:09:02,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:09:02,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:09:02,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:09:02,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:09:02,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:09:02,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:09:02,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:09:02,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:09:02,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:09:02,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:09:02,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:09:02,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:09:02,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:09:02,543 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:09:02,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:09:02,543 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:09:02,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:09:02,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:09:02,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:09:02,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:09:02,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:09:02,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:09:02,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:09:02,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:09:02,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:09:02,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:09:02,546 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:09:02,547 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:09:02,547 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:09:02,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:09:02,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:09:02,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:09:02,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:09:02,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:09:02,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:09:02,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:09:02,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:02,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:09:02,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:09:02,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:09:02,550 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:09:02,550 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:02,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:09:02,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:09:02,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:09:02,551 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_c18190b6-04ca-4301-81fc-534334b25fd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e77838346608929bef5ad1e655ea0710d74ebb9f10b29169ab985d305812d92 [2021-11-12 23:09:02,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:09:02,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:09:02,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:09:02,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:09:02,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:09:02,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-12 23:09:02,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/caeb51d2a/9da954a91bc7487496bc2d780014732f/FLAG8b6e3e45d [2021-11-12 23:09:03,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:09:03,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c [2021-11-12 23:09:03,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/caeb51d2a/9da954a91bc7487496bc2d780014732f/FLAG8b6e3e45d [2021-11-12 23:09:03,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/data/caeb51d2a/9da954a91bc7487496bc2d780014732f [2021-11-12 23:09:03,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:09:03,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:09:03,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:03,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:09:03,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:09:03,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:03" (1/1) ... [2021-11-12 23:09:03,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8879a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:03, skipping insertion in model container [2021-11-12 23:09:03,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:03" (1/1) ... [2021-11-12 23:09:03,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:09:04,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:04,172 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_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-12 23:09:04,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:04,628 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:09:04,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:04,666 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_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-12 23:09:04,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:04,850 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:09:04,863 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_c18190b6-04ca-4301-81fc-534334b25fd0/sv-benchmarks/c/product-lines/elevator_spec13_product31.cil.c[1546,1559] [2021-11-12 23:09:04,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:04,977 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:09:04,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04 WrapperNode [2021-11-12 23:09:04,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:04,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:09:04,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:09:04,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:09:04,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:09:05,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:09:05,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:09:05,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:09:05,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:09:05,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:09:05,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:09:05,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:09:05,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (1/1) ... [2021-11-12 23:09:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:09:05,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:09:05,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:09:05,297 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:09:05,297 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:09:05,297 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:09:05,298 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:09:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:09:05,298 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:09:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:09:05,298 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:09:05,298 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-12 23:09:05,299 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-12 23:09:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:09:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:09:05,299 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:09:05,299 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:09:05,300 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:09:05,300 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:09:05,300 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:09:05,300 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:09:05,300 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:09:05,300 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:09:05,301 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:09:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:09:05,301 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:09:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:09:05,301 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:09:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:09:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:09:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:09:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:09:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:09:05,302 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:09:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:09:05,303 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:09:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:09:05,303 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:09:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:09:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:09:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:09:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:09:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:09:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:09:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:09:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:09:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:09:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:09:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:09:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:09:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:09:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:09:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:09:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:09:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:09:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:09:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:09:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:09:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:09:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:09:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:09:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:09:05,308 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:09:09,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:09:09,300 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:09:09,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:09:09 BoogieIcfgContainer [2021-11-12 23:09:09,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:09:09,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:09:09,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:09:09,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:09:09,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:09:03" (1/3) ... [2021-11-12 23:09:09,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333bddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:09:09, skipping insertion in model container [2021-11-12 23:09:09,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:04" (2/3) ... [2021-11-12 23:09:09,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333bddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:09:09, skipping insertion in model container [2021-11-12 23:09:09,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:09:09" (3/3) ... [2021-11-12 23:09:09,315 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2021-11-12 23:09:09,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:09:09,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:09:09,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:09:09,423 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 23:09:09,423 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:09:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 629 states, 491 states have (on average 1.6761710794297353) internal successors, (823), 509 states have internal predecessors, (823), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:09:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:09:09,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:09,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:09,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1476014081, now seen corresponding path program 1 times [2021-11-12 23:09:09,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:09,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964466696] [2021-11-12 23:09:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:09,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:09,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:09,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:09,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:09:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:09:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:09:11,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:11,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964466696] [2021-11-12 23:09:11,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964466696] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:11,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:11,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:09:11,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051454754] [2021-11-12 23:09:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:11,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:11,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:11,158 INFO L87 Difference]: Start difference. First operand has 629 states, 491 states have (on average 1.6761710794297353) internal successors, (823), 509 states have internal predecessors, (823), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:11,397 INFO L93 Difference]: Finished difference Result 1252 states and 2086 transitions. [2021-11-12 23:09:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:11,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-12 23:09:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:11,437 INFO L225 Difference]: With dead ends: 1252 [2021-11-12 23:09:11,442 INFO L226 Difference]: Without dead ends: 623 [2021-11-12 23:09:11,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:09:11,464 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 15 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.88ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:11,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3027 Invalid, 43 Unknown, 0 Unchecked, 24.88ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 55.26ms Time] [2021-11-12 23:09:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-12 23:09:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2021-11-12 23:09:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 487 states have (on average 1.6550308008213552) internal successors, (806), 503 states have internal predecessors, (806), 108 states have call successors, (108), 29 states have call predecessors, (108), 27 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:09:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1019 transitions. [2021-11-12 23:09:11,571 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1019 transitions. Word has length 131 [2021-11-12 23:09:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:11,571 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1019 transitions. [2021-11-12 23:09:11,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1019 transitions. [2021-11-12 23:09:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:09:11,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:11,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:11,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:09:11,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:11,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1513645531, now seen corresponding path program 1 times [2021-11-12 23:09:11,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:11,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549058998] [2021-11-12 23:09:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:11,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:11,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:09:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:12,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:13,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549058998] [2021-11-12 23:09:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549058998] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:13,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:13,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:09:13,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015496764] [2021-11-12 23:09:13,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:13,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:09:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:09:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:13,188 INFO L87 Difference]: Start difference. First operand 623 states and 1019 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:13,500 INFO L93 Difference]: Finished difference Result 1258 states and 2063 transitions. [2021-11-12 23:09:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 133 [2021-11-12 23:09:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:13,511 INFO L225 Difference]: With dead ends: 1258 [2021-11-12 23:09:13,512 INFO L226 Difference]: Without dead ends: 645 [2021-11-12 23:09:13,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 255 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 23:09:13,519 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 119 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5964 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:13,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5964 Invalid, 98 Unknown, 0 Unchecked, 15.11ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 207.76ms Time] [2021-11-12 23:09:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-12 23:09:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 636. [2021-11-12 23:09:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 497 states have (on average 1.6519114688128773) internal successors, (821), 515 states have internal predecessors, (821), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2021-11-12 23:09:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1041 transitions. [2021-11-12 23:09:13,618 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1041 transitions. Word has length 133 [2021-11-12 23:09:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1041 transitions. [2021-11-12 23:09:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1041 transitions. [2021-11-12 23:09:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:09:13,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:13,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:13,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:13,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:13,851 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash 961051164, now seen corresponding path program 1 times [2021-11-12 23:09:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:13,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465581443] [2021-11-12 23:09:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:13,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:13,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:13,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:09:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:14,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:15,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:15,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465581443] [2021-11-12 23:09:15,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465581443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:15,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:09:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666131947] [2021-11-12 23:09:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:15,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:09:15,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:09:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:15,195 INFO L87 Difference]: Start difference. First operand 636 states and 1041 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:15,585 INFO L93 Difference]: Finished difference Result 1278 states and 2096 transitions. [2021-11-12 23:09:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 134 [2021-11-12 23:09:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:15,593 INFO L225 Difference]: With dead ends: 1278 [2021-11-12 23:09:15,593 INFO L226 Difference]: Without dead ends: 654 [2021-11-12 23:09:15,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:09:15,599 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 105 mSDsluCounter, 4997 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 259.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6023 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:15,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 6023 Invalid, 120 Unknown, 0 Unchecked, 14.60ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 303.06ms Time] [2021-11-12 23:09:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-12 23:09:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 636. [2021-11-12 23:09:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 497 states have (on average 1.6519114688128773) internal successors, (821), 515 states have internal predecessors, (821), 109 states have call successors, (109), 29 states have call predecessors, (109), 29 states have return successors, (111), 104 states have call predecessors, (111), 106 states have call successors, (111) [2021-11-12 23:09:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1041 transitions. [2021-11-12 23:09:15,639 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1041 transitions. Word has length 134 [2021-11-12 23:09:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:15,640 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1041 transitions. [2021-11-12 23:09:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1041 transitions. [2021-11-12 23:09:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:09:15,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:15,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:15,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:15,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:15,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -182829480, now seen corresponding path program 1 times [2021-11-12 23:09:15,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:15,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31509214] [2021-11-12 23:09:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:15,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:15,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:15,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:09:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:09:16,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:09:16,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:16,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31509214] [2021-11-12 23:09:16,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31509214] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:16,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:16,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:09:16,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333827926] [2021-11-12 23:09:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:16,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:16,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:09:16,976 INFO L87 Difference]: Start difference. First operand 636 states and 1041 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:17,069 INFO L93 Difference]: Finished difference Result 1263 states and 2071 transitions. [2021-11-12 23:09:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-11-12 23:09:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:17,075 INFO L225 Difference]: With dead ends: 1263 [2021-11-12 23:09:17,075 INFO L226 Difference]: Without dead ends: 637 [2021-11-12 23:09:17,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:17,082 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 22 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.02ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:17,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2994 Invalid, 36 Unknown, 0 Unchecked, 6.02ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 40.14ms Time] [2021-11-12 23:09:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-12 23:09:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2021-11-12 23:09:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 499 states have (on average 1.651302605210421) internal successors, (824), 516 states have internal predecessors, (824), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-12 23:09:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1039 transitions. [2021-11-12 23:09:17,115 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1039 transitions. Word has length 134 [2021-11-12 23:09:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:17,116 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1039 transitions. [2021-11-12 23:09:17,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1039 transitions. [2021-11-12 23:09:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:09:17,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:17,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:17,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:17,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:17,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1580924496, now seen corresponding path program 1 times [2021-11-12 23:09:17,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:17,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262014377] [2021-11-12 23:09:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:17,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:17,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:17,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:09:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:18,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:18,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:18,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262014377] [2021-11-12 23:09:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262014377] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:18,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:18,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:09:18,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021749636] [2021-11-12 23:09:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:09:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:09:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:18,610 INFO L87 Difference]: Start difference. First operand 637 states and 1039 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:18,942 INFO L93 Difference]: Finished difference Result 1268 states and 2076 transitions. [2021-11-12 23:09:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2021-11-12 23:09:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:18,951 INFO L225 Difference]: With dead ends: 1268 [2021-11-12 23:09:18,951 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 23:09:18,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 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 23:09:18,957 INFO L933 BasicCegarLoop]: 1014 mSDtfsCounter, 104 mSDsluCounter, 4935 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:18,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5949 Invalid, 107 Unknown, 0 Unchecked, 14.54ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 258.36ms Time] [2021-11-12 23:09:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 23:09:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 637. [2021-11-12 23:09:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 499 states have (on average 1.651302605210421) internal successors, (824), 516 states have internal predecessors, (824), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-12 23:09:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1039 transitions. [2021-11-12 23:09:18,995 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1039 transitions. Word has length 136 [2021-11-12 23:09:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:18,996 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1039 transitions. [2021-11-12 23:09:18,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1039 transitions. [2021-11-12 23:09:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:09:19,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:19,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:19,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:19,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:19,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1874539655, now seen corresponding path program 1 times [2021-11-12 23:09:19,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:19,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653746357] [2021-11-12 23:09:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:19,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:19,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:19,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:19,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:09:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:19,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:09:20,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:20,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653746357] [2021-11-12 23:09:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653746357] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:20,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:20,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:09:20,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783593281] [2021-11-12 23:09:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:20,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:20,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:20,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:20,349 INFO L87 Difference]: Start difference. First operand 637 states and 1039 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:20,617 INFO L93 Difference]: Finished difference Result 1288 states and 2114 transitions. [2021-11-12 23:09:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-12 23:09:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:20,630 INFO L225 Difference]: With dead ends: 1288 [2021-11-12 23:09:20,631 INFO L226 Difference]: Without dead ends: 666 [2021-11-12 23:09:20,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:09:20,640 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 112 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.36ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:20,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2838 Invalid, 147 Unknown, 0 Unchecked, 6.36ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 214.90ms Time] [2021-11-12 23:09:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-12 23:09:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 657. [2021-11-12 23:09:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 518 states have (on average 1.6467181467181466) internal successors, (853), 535 states have internal predecessors, (853), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1067 transitions. [2021-11-12 23:09:20,674 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1067 transitions. Word has length 137 [2021-11-12 23:09:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:20,675 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1067 transitions. [2021-11-12 23:09:20,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1067 transitions. [2021-11-12 23:09:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:09:20,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:20,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:20,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:20,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:20,901 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash 872074532, now seen corresponding path program 1 times [2021-11-12 23:09:20,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:20,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244279953] [2021-11-12 23:09:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:20,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:20,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:20,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:09:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:22,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:22,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244279953] [2021-11-12 23:09:22,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244279953] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:22,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:22,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:09:22,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585927480] [2021-11-12 23:09:22,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:22,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:09:22,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:09:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:09:22,209 INFO L87 Difference]: Start difference. First operand 657 states and 1067 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:22,450 INFO L93 Difference]: Finished difference Result 1317 states and 2145 transitions. [2021-11-12 23:09:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 138 [2021-11-12 23:09:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:22,458 INFO L225 Difference]: With dead ends: 1317 [2021-11-12 23:09:22,459 INFO L226 Difference]: Without dead ends: 675 [2021-11-12 23:09:22,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 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 23:09:22,464 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 154 mSDsluCounter, 4863 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5865 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.84ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5865 Invalid, 89 Unknown, 0 Unchecked, 9.84ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 178.69ms Time] [2021-11-12 23:09:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-12 23:09:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 657. [2021-11-12 23:09:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 518 states have (on average 1.6467181467181466) internal successors, (853), 535 states have internal predecessors, (853), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1067 transitions. [2021-11-12 23:09:22,501 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1067 transitions. Word has length 138 [2021-11-12 23:09:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:22,501 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1067 transitions. [2021-11-12 23:09:22,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1067 transitions. [2021-11-12 23:09:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:09:22,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:22,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:22,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:09:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:22,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -529868501, now seen corresponding path program 1 times [2021-11-12 23:09:22,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:22,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760021577] [2021-11-12 23:09:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:22,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:22,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:22,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:09:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:23,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:24,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:24,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760021577] [2021-11-12 23:09:24,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760021577] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:24,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:24,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:09:24,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412337954] [2021-11-12 23:09:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:24,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:09:24,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:09:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:24,057 INFO L87 Difference]: Start difference. First operand 657 states and 1067 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:24,416 INFO L93 Difference]: Finished difference Result 1312 states and 2136 transitions. [2021-11-12 23:09:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:09:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 139 [2021-11-12 23:09:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:24,424 INFO L225 Difference]: With dead ends: 1312 [2021-11-12 23:09:24,424 INFO L226 Difference]: Without dead ends: 670 [2021-11-12 23:09:24,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:09:24,429 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 112 mSDsluCounter, 5845 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 230.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6837 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 255.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:24,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6837 Invalid, 160 Unknown, 0 Unchecked, 11.81ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 255.65ms Time] [2021-11-12 23:09:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-12 23:09:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 661. [2021-11-12 23:09:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 522 states have (on average 1.6417624521072798) internal successors, (857), 539 states have internal predecessors, (857), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1071 transitions. [2021-11-12 23:09:24,459 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1071 transitions. Word has length 139 [2021-11-12 23:09:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1071 transitions. [2021-11-12 23:09:24,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1071 transitions. [2021-11-12 23:09:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:09:24,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:24,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:24,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:24,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:24,681 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:24,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1281028484, now seen corresponding path program 1 times [2021-11-12 23:09:24,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:24,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219584452] [2021-11-12 23:09:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:24,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:24,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:24,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:24,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:09:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:25,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:25,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:25,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219584452] [2021-11-12 23:09:25,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219584452] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:25,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:25,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:09:25,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689008754] [2021-11-12 23:09:25,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:26,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:09:26,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:26,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:09:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:26,001 INFO L87 Difference]: Start difference. First operand 661 states and 1071 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:26,449 INFO L93 Difference]: Finished difference Result 1322 states and 2148 transitions. [2021-11-12 23:09:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:09:26,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 140 [2021-11-12 23:09:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:26,457 INFO L225 Difference]: With dead ends: 1322 [2021-11-12 23:09:26,457 INFO L226 Difference]: Without dead ends: 676 [2021-11-12 23:09:26,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:09:26,463 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 108 mSDsluCounter, 5851 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6845 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.36ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:26,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6845 Invalid, 179 Unknown, 0 Unchecked, 29.36ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 327.13ms Time] [2021-11-12 23:09:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-12 23:09:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 667. [2021-11-12 23:09:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 528 states have (on average 1.634469696969697) internal successors, (863), 545 states have internal predecessors, (863), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1077 transitions. [2021-11-12 23:09:26,493 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1077 transitions. Word has length 140 [2021-11-12 23:09:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:26,493 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1077 transitions. [2021-11-12 23:09:26,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1077 transitions. [2021-11-12 23:09:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:09:26,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:26,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:26,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:26,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:26,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1394831322, now seen corresponding path program 1 times [2021-11-12 23:09:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:26,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387862037] [2021-11-12 23:09:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:26,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:26,722 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:26,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:09:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:09:27,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:27,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:27,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387862037] [2021-11-12 23:09:27,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387862037] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:27,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:27,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:09:27,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123523488] [2021-11-12 23:09:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:09:27,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:09:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:27,977 INFO L87 Difference]: Start difference. First operand 667 states and 1077 transitions. Second operand has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:28,386 INFO L93 Difference]: Finished difference Result 1336 states and 2164 transitions. [2021-11-12 23:09:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:09:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-11-12 23:09:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:28,395 INFO L225 Difference]: With dead ends: 1336 [2021-11-12 23:09:28,395 INFO L226 Difference]: Without dead ends: 684 [2021-11-12 23:09:28,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:09:28,399 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 108 mSDsluCounter, 5851 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6845 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:28,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6845 Invalid, 184 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 314.07ms Time] [2021-11-12 23:09:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-12 23:09:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 675. [2021-11-12 23:09:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 536 states have (on average 1.625) internal successors, (871), 553 states have internal predecessors, (871), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1085 transitions. [2021-11-12 23:09:28,432 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1085 transitions. Word has length 141 [2021-11-12 23:09:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:28,432 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1085 transitions. [2021-11-12 23:09:28,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:09:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1085 transitions. [2021-11-12 23:09:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:09:28,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:28,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:28,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:28,653 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1426230881, now seen corresponding path program 1 times [2021-11-12 23:09:28,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:28,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326922732] [2021-11-12 23:09:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:28,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:28,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:28,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:09:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:29,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:29,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326922732] [2021-11-12 23:09:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326922732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:29,773 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:29,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:09:29,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526115712] [2021-11-12 23:09:29,774 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:29,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:09:29,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:09:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:29,776 INFO L87 Difference]: Start difference. First operand 675 states and 1085 transitions. Second operand has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:30,115 INFO L93 Difference]: Finished difference Result 1275 states and 2048 transitions. [2021-11-12 23:09:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:09:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 142 [2021-11-12 23:09:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:30,124 INFO L225 Difference]: With dead ends: 1275 [2021-11-12 23:09:30,124 INFO L226 Difference]: Without dead ends: 693 [2021-11-12 23:09:30,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 274 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 23:09:30,129 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 100 mSDsluCounter, 6830 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7832 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.09ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 276.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:30,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7832 Invalid, 138 Unknown, 0 Unchecked, 9.09ms Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 276.87ms Time] [2021-11-12 23:09:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-12 23:09:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 682. [2021-11-12 23:09:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 540 states have (on average 1.6203703703703705) internal successors, (875), 559 states have internal predecessors, (875), 109 states have call successors, (109), 31 states have call predecessors, (109), 32 states have return successors, (110), 104 states have call predecessors, (110), 106 states have call successors, (110) [2021-11-12 23:09:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1094 transitions. [2021-11-12 23:09:30,163 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1094 transitions. Word has length 142 [2021-11-12 23:09:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1094 transitions. [2021-11-12 23:09:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1094 transitions. [2021-11-12 23:09:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:09:30,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:30,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:30,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:30,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:30,393 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 56898185, now seen corresponding path program 1 times [2021-11-12 23:09:30,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:30,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595638832] [2021-11-12 23:09:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:30,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:30,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:30,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:30,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:09:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:31,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:31,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:31,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595638832] [2021-11-12 23:09:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595638832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:31,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:31,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:09:31,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118164034] [2021-11-12 23:09:31,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:31,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:09:31,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:09:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:09:31,537 INFO L87 Difference]: Start difference. First operand 682 states and 1094 transitions. Second operand has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:31,889 INFO L93 Difference]: Finished difference Result 1278 states and 2051 transitions. [2021-11-12 23:09:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:09:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 144 [2021-11-12 23:09:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:31,897 INFO L225 Difference]: With dead ends: 1278 [2021-11-12 23:09:31,897 INFO L226 Difference]: Without dead ends: 696 [2021-11-12 23:09:31,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 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 23:09:31,902 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 96 mSDsluCounter, 7849 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 8853 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:31,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 8853 Invalid, 166 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 295.65ms Time] [2021-11-12 23:09:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-12 23:09:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 689. [2021-11-12 23:09:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.6158088235294117) internal successors, (879), 565 states have internal predecessors, (879), 110 states have call successors, (110), 31 states have call predecessors, (110), 34 states have return successors, (114), 105 states have call predecessors, (114), 107 states have call successors, (114) [2021-11-12 23:09:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1103 transitions. [2021-11-12 23:09:31,933 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1103 transitions. Word has length 144 [2021-11-12 23:09:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:31,933 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1103 transitions. [2021-11-12 23:09:31,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1103 transitions. [2021-11-12 23:09:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:09:31,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:31,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:31,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:32,160 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1772893733, now seen corresponding path program 1 times [2021-11-12 23:09:32,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:32,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199962752] [2021-11-12 23:09:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:32,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:32,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:32,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:32,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:09:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:09:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:32,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:33,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199962752] [2021-11-12 23:09:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199962752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:33,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:33,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:09:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345874193] [2021-11-12 23:09:33,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:33,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:09:33,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:09:33,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:09:33,354 INFO L87 Difference]: Start difference. First operand 689 states and 1103 transitions. Second operand has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:09:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:33,583 INFO L93 Difference]: Finished difference Result 1279 states and 2052 transitions. [2021-11-12 23:09:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:33,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 144 [2021-11-12 23:09:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:33,591 INFO L225 Difference]: With dead ends: 1279 [2021-11-12 23:09:33,591 INFO L226 Difference]: Without dead ends: 697 [2021-11-12 23:09:33,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 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 23:09:33,596 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 171 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5887 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5887 Invalid, 93 Unknown, 0 Unchecked, 6.50ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 182.73ms Time] [2021-11-12 23:09:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-11-12 23:09:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 692. [2021-11-12 23:09:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 546 states have (on average 1.6135531135531136) internal successors, (881), 568 states have internal predecessors, (881), 110 states have call successors, (110), 31 states have call predecessors, (110), 35 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-12 23:09:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1106 transitions. [2021-11-12 23:09:33,626 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1106 transitions. Word has length 144 [2021-11-12 23:09:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:33,627 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 1106 transitions. [2021-11-12 23:09:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:09:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1106 transitions. [2021-11-12 23:09:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:09:33,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:33,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:33,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:33,849 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -454487101, now seen corresponding path program 1 times [2021-11-12 23:09:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:33,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154753120] [2021-11-12 23:09:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:33,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:33,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:33,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:09:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:09:34,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:09:34,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:34,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154753120] [2021-11-12 23:09:34,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154753120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:34,869 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:34,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:09:34,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641039740] [2021-11-12 23:09:34,869 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:34,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:34,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:09:34,871 INFO L87 Difference]: Start difference. First operand 692 states and 1106 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:09:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:34,950 INFO L93 Difference]: Finished difference Result 1349 states and 2160 transitions. [2021-11-12 23:09:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:34,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 144 [2021-11-12 23:09:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:34,956 INFO L225 Difference]: With dead ends: 1349 [2021-11-12 23:09:34,956 INFO L226 Difference]: Without dead ends: 642 [2021-11-12 23:09:34,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:34,961 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 23 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:34,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2993 Invalid, 36 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 42.92ms Time] [2021-11-12 23:09:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-12 23:09:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2021-11-12 23:09:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 503 states have (on average 1.5964214711729623) internal successors, (803), 520 states have internal predecessors, (803), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:09:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1016 transitions. [2021-11-12 23:09:34,990 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1016 transitions. Word has length 144 [2021-11-12 23:09:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1016 transitions. [2021-11-12 23:09:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:09:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1016 transitions. [2021-11-12 23:09:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:09:34,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:34,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:35,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:35,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:35,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash -366210040, now seen corresponding path program 1 times [2021-11-12 23:09:35,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:35,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805463371] [2021-11-12 23:09:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:35,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:35,212 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:35,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:09:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:09:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:09:35,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:09:36,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:36,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805463371] [2021-11-12 23:09:36,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805463371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:36,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:36,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:09:36,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101226830] [2021-11-12 23:09:36,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:36,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:09:36,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:09:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:09:36,311 INFO L87 Difference]: Start difference. First operand 642 states and 1016 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:09:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:36,500 INFO L93 Difference]: Finished difference Result 1310 states and 2065 transitions. [2021-11-12 23:09:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:09:36,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 146 [2021-11-12 23:09:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:36,507 INFO L225 Difference]: With dead ends: 1310 [2021-11-12 23:09:36,507 INFO L226 Difference]: Without dead ends: 639 [2021-11-12 23:09:36,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 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 23:09:36,511 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 120 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 4665 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.15ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:36,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 4665 Invalid, 99 Unknown, 0 Unchecked, 5.15ms Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 143.36ms Time] [2021-11-12 23:09:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-12 23:09:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2021-11-12 23:09:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 500 states have (on average 1.576) internal successors, (788), 516 states have internal predecessors, (788), 108 states have call successors, (108), 32 states have call predecessors, (108), 30 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:09:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1001 transitions. [2021-11-12 23:09:36,538 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1001 transitions. Word has length 146 [2021-11-12 23:09:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:36,538 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1001 transitions. [2021-11-12 23:09:36,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:09:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1001 transitions. [2021-11-12 23:09:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:09:36,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:36,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:36,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:36,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:36,764 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1711381069, now seen corresponding path program 1 times [2021-11-12 23:09:36,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:36,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146459908] [2021-11-12 23:09:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:36,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:36,766 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:36,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:09:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:09:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:09:37,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:09:37,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:37,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146459908] [2021-11-12 23:09:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146459908] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:37,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:09:37,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532279616] [2021-11-12 23:09:37,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:37,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:37,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:09:37,967 INFO L87 Difference]: Start difference. First operand 639 states and 1001 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:39,999 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 23:09:42,005 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 23:09:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:43,251 INFO L93 Difference]: Finished difference Result 1221 states and 1968 transitions. [2021-11-12 23:09:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:09:43,253 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 147 [2021-11-12 23:09:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:43,257 INFO L225 Difference]: With dead ends: 1221 [2021-11-12 23:09:43,257 INFO L226 Difference]: Without dead ends: 643 [2021-11-12 23:09:43,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 285 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 23:09:43,262 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 885 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5050.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.51ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5195.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:43,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2390 Invalid, 489 Unknown, 0 Unchecked, 17.51ms Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 2 Unknown, 0 Unchecked, 5195.33ms Time] [2021-11-12 23:09:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-12 23:09:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2021-11-12 23:09:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 503 states have (on average 1.5725646123260437) internal successors, (791), 519 states have internal predecessors, (791), 108 states have call successors, (108), 33 states have call predecessors, (108), 31 states have return successors, (106), 103 states have call predecessors, (106), 105 states have call successors, (106) [2021-11-12 23:09:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1005 transitions. [2021-11-12 23:09:43,291 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1005 transitions. Word has length 147 [2021-11-12 23:09:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:43,291 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1005 transitions. [2021-11-12 23:09:43,292 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1005 transitions. [2021-11-12 23:09:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:09:43,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:43,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:43,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:43,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:43,517 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1764897473, now seen corresponding path program 1 times [2021-11-12 23:09:43,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:43,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933812861] [2021-11-12 23:09:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:43,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:43,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:43,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:09:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:09:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:09:44,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:09:44,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:44,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933812861] [2021-11-12 23:09:44,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933812861] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:44,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:44,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:09:44,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056944259] [2021-11-12 23:09:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:44,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:09:44,810 INFO L87 Difference]: Start difference. First operand 643 states and 1005 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:46,839 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 23:09:48,846 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 23:09:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:49,891 INFO L93 Difference]: Finished difference Result 1230 states and 1975 transitions. [2021-11-12 23:09:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:09:49,891 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 149 [2021-11-12 23:09:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:49,898 INFO L225 Difference]: With dead ends: 1230 [2021-11-12 23:09:49,898 INFO L226 Difference]: Without dead ends: 648 [2021-11-12 23:09:49,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 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 23:09:49,903 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 895 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4884.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.96ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5010.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:49,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 2391 Invalid, 491 Unknown, 0 Unchecked, 8.96ms Time], IncrementalHoareTripleChecker [14 Valid, 475 Invalid, 2 Unknown, 0 Unchecked, 5010.22ms Time] [2021-11-12 23:09:49,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-12 23:09:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-11-12 23:09:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 507 states have (on average 1.5680473372781065) internal successors, (795), 523 states have internal predecessors, (795), 108 states have call successors, (108), 34 states have call predecessors, (108), 32 states have return successors, (107), 103 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-12 23:09:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1010 transitions. [2021-11-12 23:09:49,933 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1010 transitions. Word has length 149 [2021-11-12 23:09:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:49,934 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1010 transitions. [2021-11-12 23:09:49,934 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1010 transitions. [2021-11-12 23:09:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:09:49,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:49,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:49,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:50,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:50,159 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash -529223283, now seen corresponding path program 1 times [2021-11-12 23:09:50,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:50,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030240676] [2021-11-12 23:09:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:50,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:50,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:50,161 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:50,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:09:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:09:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:09:51,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:09:51,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:51,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030240676] [2021-11-12 23:09:51,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030240676] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:51,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:51,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:09:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076440103] [2021-11-12 23:09:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:51,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:51,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:09:51,451 INFO L87 Difference]: Start difference. First operand 648 states and 1010 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:53,473 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 23:09:55,479 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 23:09:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:56,422 INFO L93 Difference]: Finished difference Result 1241 states and 1984 transitions. [2021-11-12 23:09:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:09:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 151 [2021-11-12 23:09:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:56,428 INFO L225 Difference]: With dead ends: 1241 [2021-11-12 23:09:56,428 INFO L226 Difference]: Without dead ends: 654 [2021-11-12 23:09:56,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 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 23:09:56,433 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 892 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4761.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.70ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4912.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:56,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 2391 Invalid, 490 Unknown, 0 Unchecked, 6.70ms Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 2 Unknown, 0 Unchecked, 4912.19ms Time] [2021-11-12 23:09:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-12 23:09:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2021-11-12 23:09:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 512 states have (on average 1.5625) internal successors, (800), 528 states have internal predecessors, (800), 108 states have call successors, (108), 35 states have call predecessors, (108), 33 states have return successors, (108), 103 states have call predecessors, (108), 105 states have call successors, (108) [2021-11-12 23:09:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1016 transitions. [2021-11-12 23:09:56,463 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1016 transitions. Word has length 151 [2021-11-12 23:09:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:56,463 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1016 transitions. [2021-11-12 23:09:56,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1016 transitions. [2021-11-12 23:09:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 23:09:56,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:56,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:56,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:56,688 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 372938889, now seen corresponding path program 1 times [2021-11-12 23:09:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:56,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341588875] [2021-11-12 23:09:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:56,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:56,690 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:56,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:09:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:09:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:09:57,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:09:57,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341588875] [2021-11-12 23:09:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341588875] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:57,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:09:57,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190940488] [2021-11-12 23:09:57,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:57,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:57,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:09:57,916 INFO L87 Difference]: Start difference. First operand 654 states and 1016 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:09:59,951 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 23:10:01,957 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 23:10:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:02,959 INFO L93 Difference]: Finished difference Result 1254 states and 1995 transitions. [2021-11-12 23:10:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 153 [2021-11-12 23:10:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:02,965 INFO L225 Difference]: With dead ends: 1254 [2021-11-12 23:10:02,965 INFO L226 Difference]: Without dead ends: 661 [2021-11-12 23:10:02,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 297 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 23:10:02,970 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 895 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4836.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4984.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:02,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 2391 Invalid, 489 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [10 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 4984.06ms Time] [2021-11-12 23:10:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-11-12 23:10:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2021-11-12 23:10:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 518 states have (on average 1.555984555984556) internal successors, (806), 534 states have internal predecessors, (806), 108 states have call successors, (108), 36 states have call predecessors, (108), 34 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-12 23:10:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1023 transitions. [2021-11-12 23:10:03,000 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1023 transitions. Word has length 153 [2021-11-12 23:10:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:03,000 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1023 transitions. [2021-11-12 23:10:03,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:10:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1023 transitions. [2021-11-12 23:10:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:10:03,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:03,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:03,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:03,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:03,226 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash -54809907, now seen corresponding path program 1 times [2021-11-12 23:10:03,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:03,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983804789] [2021-11-12 23:10:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:03,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:03,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:03,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:10:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:03,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:10:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:10:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:10:04,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983804789] [2021-11-12 23:10:04,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983804789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [845441292] [2021-11-12 23:10:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:04,931 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:04,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:04,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:10:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:10:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:10:05,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:10:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [845441292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:06,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369002519] [2021-11-12 23:10:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:06,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:06,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:06,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-12 23:10:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:10:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:10:06,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:10:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369002519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:07,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:10:07,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 13 [2021-11-12 23:10:07,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249022958] [2021-11-12 23:10:07,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:10:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:10:07,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:10:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:10:07,495 INFO L87 Difference]: Start difference. First operand 661 states and 1023 transitions. Second operand has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-12 23:10:09,525 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 23:10:11,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:13,536 WARN L515 Checker$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 23:10:15,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:17,550 WARN L515 Checker$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 23:10:19,556 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 23:10:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:29,684 INFO L93 Difference]: Finished difference Result 2219 states and 3543 transitions. [2021-11-12 23:10:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:10:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) Word has length 155 [2021-11-12 23:10:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:29,708 INFO L225 Difference]: With dead ends: 2219 [2021-11-12 23:10:29,708 INFO L226 Difference]: Without dead ends: 1619 [2021-11-12 23:10:29,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:10:29,714 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1925 mSDsluCounter, 3712 mSDsCounter, 0 mSdLazyCounter, 7794 mSolverCounterSat, 740 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20506.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2044 SdHoareTripleChecker+Valid, 5363 SdHoareTripleChecker+Invalid, 8540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.69ms SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 7794 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21717.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:29,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2044 Valid, 5363 Invalid, 8540 Unknown, 0 Unchecked, 52.69ms Time], IncrementalHoareTripleChecker [740 Valid, 7794 Invalid, 6 Unknown, 0 Unchecked, 21717.82ms Time] [2021-11-12 23:10:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-11-12 23:10:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1371. [2021-11-12 23:10:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1053 states have (on average 1.5603038936372269) internal successors, (1643), 1091 states have internal predecessors, (1643), 245 states have call successors, (245), 69 states have call predecessors, (245), 72 states have return successors, (267), 241 states have call predecessors, (267), 241 states have call successors, (267) [2021-11-12 23:10:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2155 transitions. [2021-11-12 23:10:29,833 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2155 transitions. Word has length 155 [2021-11-12 23:10:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:29,833 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 2155 transitions. [2021-11-12 23:10:29,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 10 states have internal predecessors, (160), 5 states have call successors, (35), 5 states have call predecessors, (35), 9 states have return successors, (34), 8 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-12 23:10:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2155 transitions. [2021-11-12 23:10:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:10:29,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:29,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:29,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:30,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:30,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:30,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:30,465 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:30,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2035370869, now seen corresponding path program 1 times [2021-11-12 23:10:30,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:30,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694020750] [2021-11-12 23:10:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:30,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:30,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:30,467 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:30,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:10:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:10:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:10:31,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:10:31,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:31,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694020750] [2021-11-12 23:10:31,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694020750] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:31,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:31,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-12 23:10:31,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515075632] [2021-11-12 23:10:31,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:31,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:10:31,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:10:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:10:31,633 INFO L87 Difference]: Start difference. First operand 1371 states and 2155 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:10:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:31,983 INFO L93 Difference]: Finished difference Result 2646 states and 4197 transitions. [2021-11-12 23:10:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:31,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-12 23:10:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:31,996 INFO L225 Difference]: With dead ends: 2646 [2021-11-12 23:10:31,996 INFO L226 Difference]: Without dead ends: 1302 [2021-11-12 23:10:32,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:10:32,005 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 62 mSDsluCounter, 5568 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 215.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:32,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6505 Invalid, 179 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 239.87ms Time] [2021-11-12 23:10:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-12 23:10:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1299. [2021-11-12 23:10:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 997 states have (on average 1.5807422266800402) internal successors, (1576), 1034 states have internal predecessors, (1576), 236 states have call successors, (236), 63 states have call predecessors, (236), 65 states have return successors, (252), 232 states have call predecessors, (252), 232 states have call successors, (252) [2021-11-12 23:10:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2064 transitions. [2021-11-12 23:10:32,080 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2064 transitions. Word has length 156 [2021-11-12 23:10:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:32,080 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2064 transitions. [2021-11-12 23:10:32,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:10:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2064 transitions. [2021-11-12 23:10:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:10:32,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:32,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:32,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:32,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:32,289 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1835299162, now seen corresponding path program 1 times [2021-11-12 23:10:32,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:32,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960773672] [2021-11-12 23:10:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:32,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:32,292 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:32,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:10:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:10:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:10:33,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:10:33,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:33,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960773672] [2021-11-12 23:10:33,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960773672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:33,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810471790] [2021-11-12 23:10:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:33,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:33,797 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:33,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:10:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:10:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:10:34,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:10:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810471790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:35,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927022685] [2021-11-12 23:10:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:35,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:35,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:35,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:10:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:10:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:10:35,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:10:36,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927022685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:36,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:10:36,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 12 [2021-11-12 23:10:36,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470184907] [2021-11-12 23:10:36,449 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:10:36,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:10:36,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:10:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:10:36,451 INFO L87 Difference]: Start difference. First operand 1299 states and 2064 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:10:38,470 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 23:10:40,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:42,482 WARN L515 Checker$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 23:10:44,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:46,493 WARN L515 Checker$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 23:10:48,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:50,505 WARN L515 Checker$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 23:10:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:55,579 INFO L93 Difference]: Finished difference Result 3225 states and 5194 transitions. [2021-11-12 23:10:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) Word has length 163 [2021-11-12 23:10:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:55,595 INFO L225 Difference]: With dead ends: 3225 [2021-11-12 23:10:55,596 INFO L226 Difference]: Without dead ends: 1986 [2021-11-12 23:10:55,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:10:55,603 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 3079 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 894 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18172.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3114 SdHoareTripleChecker+Valid, 3140 SdHoareTripleChecker+Invalid, 4773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.07ms SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18864.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:55,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3114 Valid, 3140 Invalid, 4773 Unknown, 0 Unchecked, 24.07ms Time], IncrementalHoareTripleChecker [894 Valid, 3872 Invalid, 7 Unknown, 0 Unchecked, 18864.42ms Time] [2021-11-12 23:10:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-12 23:10:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1941. [2021-11-12 23:10:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1478 states have (on average 1.587956698240866) internal successors, (2347), 1536 states have internal predecessors, (2347), 364 states have call successors, (364), 90 states have call predecessors, (364), 98 states have return successors, (405), 363 states have call predecessors, (405), 359 states have call successors, (405) [2021-11-12 23:10:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3116 transitions. [2021-11-12 23:10:55,713 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3116 transitions. Word has length 163 [2021-11-12 23:10:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:55,714 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 3116 transitions. [2021-11-12 23:10:55,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 10 states have internal predecessors, (171), 5 states have call successors, (37), 5 states have call predecessors, (37), 8 states have return successors, (35), 7 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:10:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3116 transitions. [2021-11-12 23:10:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 23:10:55,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:55,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:55,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:55,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:56,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:56,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:56,333 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:56,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1915734997, now seen corresponding path program 1 times [2021-11-12 23:10:56,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:56,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527398889] [2021-11-12 23:10:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:56,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:56,336 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:56,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:10:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:10:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:10:57,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:10:57,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:57,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527398889] [2021-11-12 23:10:57,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527398889] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:57,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:57,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 23:10:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453997610] [2021-11-12 23:10:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:10:57,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:10:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:10:57,571 INFO L87 Difference]: Start difference. First operand 1941 states and 3116 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:10:59,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:01,621 WARN L515 Checker$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 23:11:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:02,753 INFO L93 Difference]: Finished difference Result 5561 states and 9033 transitions. [2021-11-12 23:11:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 164 [2021-11-12 23:11:02,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:02,781 INFO L225 Difference]: With dead ends: 5561 [2021-11-12 23:11:02,781 INFO L226 Difference]: Without dead ends: 3680 [2021-11-12 23:11:02,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 320 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 23:11:02,788 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 788 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4849.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.67ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4994.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:02,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 3609 Invalid, 661 Unknown, 0 Unchecked, 8.67ms Time], IncrementalHoareTripleChecker [23 Valid, 636 Invalid, 2 Unknown, 0 Unchecked, 4994.34ms Time] [2021-11-12 23:11:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-11-12 23:11:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 3663. [2021-11-12 23:11:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 2774 states have (on average 1.572819033886085) internal successors, (4363), 2885 states have internal predecessors, (4363), 702 states have call successors, (702), 177 states have call predecessors, (702), 186 states have return successors, (788), 695 states have call predecessors, (788), 694 states have call successors, (788) [2021-11-12 23:11:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 5853 transitions. [2021-11-12 23:11:03,020 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 5853 transitions. Word has length 164 [2021-11-12 23:11:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:03,021 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 5853 transitions. [2021-11-12 23:11:03,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:11:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 5853 transitions. [2021-11-12 23:11:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-12 23:11:03,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:03,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:03,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:03,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:03,249 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 11777506, now seen corresponding path program 1 times [2021-11-12 23:11:03,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:03,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042882028] [2021-11-12 23:11:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:03,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:03,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:03,253 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:03,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:11:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:11:03,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:11:04,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:11:06,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:06,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042882028] [2021-11-12 23:11:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042882028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:06,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:06,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-11-12 23:11:06,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024065802] [2021-11-12 23:11:06,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:06,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:11:06,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:06,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:11:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:06,351 INFO L87 Difference]: Start difference. First operand 3663 states and 5853 transitions. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-12 23:11:08,373 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 23:11:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:14,348 INFO L93 Difference]: Finished difference Result 14097 states and 22754 transitions. [2021-11-12 23:11:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) Word has length 166 [2021-11-12 23:11:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:14,521 INFO L225 Difference]: With dead ends: 14097 [2021-11-12 23:11:14,521 INFO L226 Difference]: Without dead ends: 10494 [2021-11-12 23:11:14,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:14,557 INFO L933 BasicCegarLoop]: 1943 mSDtfsCounter, 2497 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 209 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6591.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 5302 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.34ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7567.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:14,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2503 Valid, 5302 Invalid, 956 Unknown, 0 Unchecked, 14.34ms Time], IncrementalHoareTripleChecker [209 Valid, 746 Invalid, 1 Unknown, 0 Unchecked, 7567.67ms Time] [2021-11-12 23:11:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10494 states. [2021-11-12 23:11:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10494 to 9610. [2021-11-12 23:11:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9610 states, 7470 states have (on average 1.5829986613119142) internal successors, (11825), 7687 states have internal predecessors, (11825), 1639 states have call successors, (1639), 471 states have call predecessors, (1639), 500 states have return successors, (1984), 1552 states have call predecessors, (1984), 1619 states have call successors, (1984) [2021-11-12 23:11:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 15448 transitions. [2021-11-12 23:11:15,325 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 15448 transitions. Word has length 166 [2021-11-12 23:11:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:15,326 INFO L470 AbstractCegarLoop]: Abstraction has 9610 states and 15448 transitions. [2021-11-12 23:11:15,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 5 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-12 23:11:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 15448 transitions. [2021-11-12 23:11:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:11:15,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:15,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:15,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:15,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:15,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1232236850, now seen corresponding path program 1 times [2021-11-12 23:11:15,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:15,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573211026] [2021-11-12 23:11:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:15,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:15,532 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:15,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:11:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:11:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:11:16,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:11:17,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573211026] [2021-11-12 23:11:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573211026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:17,033 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:17,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 10 [2021-11-12 23:11:17,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573988344] [2021-11-12 23:11:17,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:17,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:11:17,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:11:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:17,035 INFO L87 Difference]: Start difference. First operand 9610 states and 15448 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 23:11:19,055 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 23:11:21,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:23,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:25,076 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 23:11:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:28,944 INFO L93 Difference]: Finished difference Result 25621 states and 42053 transitions. [2021-11-12 23:11:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:11:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) Word has length 170 [2021-11-12 23:11:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:29,058 INFO L225 Difference]: With dead ends: 25621 [2021-11-12 23:11:29,058 INFO L226 Difference]: Without dead ends: 16071 [2021-11-12 23:11:29,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:29,118 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 3827 mSDsluCounter, 5658 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 639 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10710.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3830 SdHoareTripleChecker+Valid, 7500 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.37ms SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11141.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:29,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3830 Valid, 7500 Invalid, 2496 Unknown, 0 Unchecked, 24.37ms Time], IncrementalHoareTripleChecker [639 Valid, 1853 Invalid, 4 Unknown, 0 Unchecked, 11141.84ms Time] [2021-11-12 23:11:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16071 states. [2021-11-12 23:11:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16071 to 16031. [2021-11-12 23:11:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16031 states, 12416 states have (on average 1.5664465206185567) internal successors, (19449), 12801 states have internal predecessors, (19449), 2752 states have call successors, (2752), 789 states have call predecessors, (2752), 862 states have return successors, (3615), 2639 states have call predecessors, (3615), 2720 states have call successors, (3615) [2021-11-12 23:11:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16031 states to 16031 states and 25816 transitions. [2021-11-12 23:11:30,117 INFO L78 Accepts]: Start accepts. Automaton has 16031 states and 25816 transitions. Word has length 170 [2021-11-12 23:11:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:30,119 INFO L470 AbstractCegarLoop]: Abstraction has 16031 states and 25816 transitions. [2021-11-12 23:11:30,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 8 states have internal predecessors, (181), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (37), 5 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 23:11:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16031 states and 25816 transitions. [2021-11-12 23:11:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:11:30,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:30,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:30,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:30,343 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2095379792, now seen corresponding path program 1 times [2021-11-12 23:11:30,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561371993] [2021-11-12 23:11:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:30,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:30,347 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:30,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:11:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:11:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:11:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:11:32,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:32,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561371993] [2021-11-12 23:11:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561371993] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:32,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:32,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 16 [2021-11-12 23:11:32,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163818212] [2021-11-12 23:11:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:11:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:11:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:11:32,512 INFO L87 Difference]: Start difference. First operand 16031 states and 25816 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:11:34,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:36,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:38,625 WARN L515 Checker$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 23:11:40,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:42,637 WARN L515 Checker$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 23:11:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:46,598 INFO L93 Difference]: Finished difference Result 26199 states and 42014 transitions. [2021-11-12 23:11:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:11:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 170 [2021-11-12 23:11:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:46,682 INFO L225 Difference]: With dead ends: 26199 [2021-11-12 23:11:46,682 INFO L226 Difference]: Without dead ends: 15959 [2021-11-12 23:11:46,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 325 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:11:46,731 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 6471 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 1578 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12851.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6478 SdHoareTripleChecker+Valid, 5618 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.90ms SdHoareTripleChecker+Time, 1578 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13283.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:46,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6478 Valid, 5618 Invalid, 3444 Unknown, 0 Unchecked, 20.90ms Time], IncrementalHoareTripleChecker [1578 Valid, 1861 Invalid, 5 Unknown, 0 Unchecked, 13283.03ms Time] [2021-11-12 23:11:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2021-11-12 23:11:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 15955. [2021-11-12 23:11:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15955 states, 12372 states have (on average 1.566844487552538) internal successors, (19385), 12757 states have internal predecessors, (19385), 2732 states have call successors, (2732), 777 states have call predecessors, (2732), 850 states have return successors, (3595), 2619 states have call predecessors, (3595), 2700 states have call successors, (3595) [2021-11-12 23:11:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15955 states to 15955 states and 25712 transitions. [2021-11-12 23:11:47,750 INFO L78 Accepts]: Start accepts. Automaton has 15955 states and 25712 transitions. Word has length 170 [2021-11-12 23:11:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:47,751 INFO L470 AbstractCegarLoop]: Abstraction has 15955 states and 25712 transitions. [2021-11-12 23:11:47,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:11:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15955 states and 25712 transitions. [2021-11-12 23:11:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 23:11:47,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:47,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:47,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:47,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:47,977 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:47,978 INFO L85 PathProgramCache]: Analyzing trace with hash -818140233, now seen corresponding path program 1 times [2021-11-12 23:11:47,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:47,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405287381] [2021-11-12 23:11:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:47,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:47,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:47,982 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:48,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:11:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:11:49,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:11:49,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:49,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405287381] [2021-11-12 23:11:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405287381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:49,474 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:49,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:11:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341674509] [2021-11-12 23:11:49,475 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:11:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:11:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:49,476 INFO L87 Difference]: Start difference. First operand 15955 states and 25712 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:11:51,506 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 23:11:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:53,957 INFO L93 Difference]: Finished difference Result 44586 states and 74023 transitions. [2021-11-12 23:11:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:11:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 177 [2021-11-12 23:11:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:54,142 INFO L225 Difference]: With dead ends: 44586 [2021-11-12 23:11:54,143 INFO L226 Difference]: Without dead ends: 28691 [2021-11-12 23:11:54,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:54,247 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 1752 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3021.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3169.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:54,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 3268 Invalid, 481 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [17 Valid, 463 Invalid, 1 Unknown, 0 Unchecked, 3169.25ms Time] [2021-11-12 23:11:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28691 states. [2021-11-12 23:11:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28691 to 28687. [2021-11-12 23:11:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28687 states, 22196 states have (on average 1.555054964858533) internal successors, (34516), 22911 states have internal predecessors, (34516), 4954 states have call successors, (4954), 1405 states have call predecessors, (4954), 1536 states have return successors, (7190), 4765 states have call predecessors, (7190), 4898 states have call successors, (7190) [2021-11-12 23:11:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28687 states to 28687 states and 46660 transitions. [2021-11-12 23:11:56,493 INFO L78 Accepts]: Start accepts. Automaton has 28687 states and 46660 transitions. Word has length 177 [2021-11-12 23:11:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 28687 states and 46660 transitions. [2021-11-12 23:11:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:11:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 28687 states and 46660 transitions. [2021-11-12 23:11:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 23:11:56,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:56,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:56,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:56,722 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 474045249, now seen corresponding path program 1 times [2021-11-12 23:11:56,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:56,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822729035] [2021-11-12 23:11:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:56,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:56,725 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:56,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:11:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:57,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:11:57,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:11:58,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822729035] [2021-11-12 23:11:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822729035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:58,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:58,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:11:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401539884] [2021-11-12 23:11:58,114 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:11:58,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:11:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:58,115 INFO L87 Difference]: Start difference. First operand 28687 states and 46660 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:12:00,138 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 23:12:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:04,866 INFO L93 Difference]: Finished difference Result 82842 states and 140528 transitions. [2021-11-12 23:12:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:04,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 178 [2021-11-12 23:12:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:05,416 INFO L225 Difference]: With dead ends: 82842 [2021-11-12 23:12:05,416 INFO L226 Difference]: Without dead ends: 54215 [2021-11-12 23:12:05,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:05,852 INFO L933 BasicCegarLoop]: 1861 mSDtfsCounter, 1760 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2969.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.85ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3137.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:05,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1760 Valid, 3284 Invalid, 483 Unknown, 0 Unchecked, 8.85ms Time], IncrementalHoareTripleChecker [17 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 3137.72ms Time] [2021-11-12 23:12:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54215 states. [2021-11-12 23:12:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54215 to 54211. [2021-11-12 23:12:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54211 states, 41892 states have (on average 1.5450921416976988) internal successors, (64727), 43267 states have internal predecessors, (64727), 9410 states have call successors, (9410), 2661 states have call predecessors, (9410), 2908 states have return successors, (15682), 9069 states have call predecessors, (15682), 9306 states have call successors, (15682) [2021-11-12 23:12:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54211 states to 54211 states and 89819 transitions. [2021-11-12 23:12:09,735 INFO L78 Accepts]: Start accepts. Automaton has 54211 states and 89819 transitions. Word has length 178 [2021-11-12 23:12:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:09,735 INFO L470 AbstractCegarLoop]: Abstraction has 54211 states and 89819 transitions. [2021-11-12 23:12:09,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:12:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54211 states and 89819 transitions. [2021-11-12 23:12:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:12:09,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:09,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:09,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 23:12:09,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:09,957 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1046892100, now seen corresponding path program 1 times [2021-11-12 23:12:09,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:09,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887181297] [2021-11-12 23:12:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:09,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:09,959 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:09,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:12:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:10,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:12:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:12:10,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:12:11,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:11,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887181297] [2021-11-12 23:12:11,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887181297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:11,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:11,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:12:11,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524743505] [2021-11-12 23:12:11,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:11,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:11,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:11,273 INFO L87 Difference]: Start difference. First operand 54211 states and 89819 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:12:13,292 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 23:12:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:22,298 INFO L93 Difference]: Finished difference Result 159474 states and 281686 transitions. [2021-11-12 23:12:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 179 [2021-11-12 23:12:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:22,890 INFO L225 Difference]: With dead ends: 159474 [2021-11-12 23:12:22,890 INFO L226 Difference]: Without dead ends: 105323 [2021-11-12 23:12:23,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:23,787 INFO L933 BasicCegarLoop]: 1870 mSDtfsCounter, 1768 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2911.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3078.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:23,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1768 Valid, 3300 Invalid, 485 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [17 Valid, 467 Invalid, 1 Unknown, 0 Unchecked, 3078.60ms Time] [2021-11-12 23:12:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105323 states. [2021-11-12 23:12:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105323 to 105319. [2021-11-12 23:12:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105319 states, 81332 states have (on average 1.5360497713077264) internal successors, (124930), 84027 states have internal predecessors, (124930), 18334 states have call successors, (18334), 5173 states have call predecessors, (18334), 5652 states have return successors, (37418), 17689 states have call predecessors, (37418), 18134 states have call successors, (37418) [2021-11-12 23:12:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105319 states to 105319 states and 180682 transitions. [2021-11-12 23:12:33,012 INFO L78 Accepts]: Start accepts. Automaton has 105319 states and 180682 transitions. Word has length 179 [2021-11-12 23:12:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:33,013 INFO L470 AbstractCegarLoop]: Abstraction has 105319 states and 180682 transitions. [2021-11-12 23:12:33,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:12:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 105319 states and 180682 transitions. [2021-11-12 23:12:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:12:33,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:33,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:33,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:33,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:33,223 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash 419676006, now seen corresponding path program 1 times [2021-11-12 23:12:33,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:33,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833271973] [2021-11-12 23:12:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:33,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:33,226 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:33,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18190b6-04ca-4301-81fc-534334b25fd0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:12:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:12:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:12:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:12:34,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:34,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833271973] [2021-11-12 23:12:34,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833271973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:34,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:34,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:12:34,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257820648] [2021-11-12 23:12:34,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:34,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:34,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:34,740 INFO L87 Difference]: Start difference. First operand 105319 states and 180682 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 4 states have call successors, (38), 3 states have call predecessors, (38), 4 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:12:36,781 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 []