./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs --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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:39,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:39,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:39,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:39,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:39,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:39,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:39,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:39,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:39,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:39,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:39,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:39,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:39,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:39,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:39,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:39,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:39,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:39,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:39,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:39,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:39,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:39,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:39,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:39,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:39,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:39,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:39,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:39,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:39,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:39,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:39,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:39,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:39,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:39,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:39,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:39,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:39,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:39,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:39,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:39,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:39,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:50:39,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:39,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:39,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:39,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:39,891 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:39,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:39,892 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:39,892 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:50:39,892 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:39,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:39,893 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:50:39,893 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:50:39,894 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:39,894 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:50:39,894 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:50:39,894 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:50:39,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:39,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:39,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:50:39,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:39,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:39,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:39,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:39,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:39,897 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:39,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:39,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:39,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:39,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:39,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:39,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:39,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:39,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:39,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:39,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:39,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:50:39,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:50:39,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:39,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:39,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:39,900 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_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2021-11-19 14:50:40,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:40,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:40,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:40,281 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:40,282 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:40,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-19 14:50:40,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/4822bbb0a/0b3cc27793d74bfb8eb29ed85bdca595/FLAGdcd0db3da [2021-11-19 14:50:41,060 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:41,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-19 14:50:41,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/4822bbb0a/0b3cc27793d74bfb8eb29ed85bdca595/FLAGdcd0db3da [2021-11-19 14:50:41,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/4822bbb0a/0b3cc27793d74bfb8eb29ed85bdca595 [2021-11-19 14:50:41,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:41,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:41,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:41,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:41,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:41,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:41" (1/1) ... [2021-11-19 14:50:41,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b6f3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:41, skipping insertion in model container [2021-11-19 14:50:41,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:41" (1/1) ... [2021-11-19 14:50:41,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:41,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:41,597 WARN L230 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_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-19 14:50:42,044 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:42,060 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) [2021-11-19 14:50:42,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c6faa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:42, skipping insertion in model container [2021-11-19 14:50:42,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:42,062 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:50:42,064 INFO L158 Benchmark]: Toolchain (without parser) took 787.33ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 56.7MB in the beginning and 77.6MB in the end (delta: -20.9MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-11-19 14:50:42,066 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory was 64.1MB in the beginning and 64.1MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:50:42,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 780.63ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 56.5MB in the beginning and 78.1MB in the end (delta: -21.6MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 14:50:42,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory was 64.1MB in the beginning and 64.1MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 780.63ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 56.5MB in the beginning and 78.1MB in the end (delta: -21.6MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 570]: 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_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs --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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:44,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:44,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:44,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:44,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:44,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:44,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:44,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:44,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:44,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:44,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:44,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:44,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:44,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:44,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:44,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:44,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:44,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:44,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:44,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:44,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:44,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:44,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:44,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:44,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:44,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:44,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:44,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:44,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:44,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:44,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:44,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:44,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:44,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:44,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:44,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:44,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:44,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:44,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:44,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:44,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:44,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:50:44,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:44,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:44,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:44,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:44,605 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:44,606 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:44,606 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:44,606 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:44,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:44,607 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:44,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:44,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:44,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:44,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:44,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:44,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:44,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:44,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:44,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:50:44,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:50:44,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:44,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:44,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:44,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:44,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:44,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:50:44,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:44,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:44,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:44,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:44,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:44,614 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:50:44,615 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:44,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:44,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:44,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:44,616 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_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2021-11-19 14:50:44,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:44,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:44,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:44,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:45,000 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:45,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-19 14:50:45,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/f4b074f9c/b2d01fc21a9d4fea9e8e1cb1493eaa1e/FLAG8fc9417fb [2021-11-19 14:50:45,859 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:45,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2021-11-19 14:50:45,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/f4b074f9c/b2d01fc21a9d4fea9e8e1cb1493eaa1e/FLAG8fc9417fb [2021-11-19 14:50:45,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/data/f4b074f9c/b2d01fc21a9d4fea9e8e1cb1493eaa1e [2021-11-19 14:50:46,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:46,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:46,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:46,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:46,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:46,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:45" (1/1) ... [2021-11-19 14:50:46,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a5c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:46, skipping insertion in model container [2021-11-19 14:50:46,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:45" (1/1) ... [2021-11-19 14:50:46,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:46,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:46,291 WARN L230 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_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-19 14:50:46,803 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:46,824 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:50:46,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:46,855 WARN L230 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_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-19 14:50:46,973 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:46,984 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:50:46,995 WARN L230 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_659d6a87-fe8b-43f0-8e17-3452670d3283/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2021-11-19 14:50:47,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:47,138 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:50:47,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47 WrapperNode [2021-11-19 14:50:47,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:47,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:47,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:50:47,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:50:47,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,275 INFO L137 Inliner]: procedures = 95, calls = 338, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1070 [2021-11-19 14:50:47,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:47,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:50:47,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:50:47,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:50:47,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:50:47,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:50:47,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:50:47,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:50:47,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (1/1) ... [2021-11-19 14:50:47,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:47,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:50:47,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:50:47,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:50:47,516 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:50:47,516 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:50:47,516 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:50:47,516 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:50:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:50:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:50:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:50:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:50:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:50:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:50:47,517 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:50:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:50:47,518 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:50:47,518 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:50:47,518 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:50:47,518 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:50:47,518 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:50:47,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:50:47,518 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:50:47,519 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:50:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:50:47,519 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:50:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:50:47,519 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:50:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:50:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:50:47,519 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:50:47,520 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:50:47,520 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:50:47,520 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:50:47,520 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:50:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:50:47,521 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:50:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:50:47,521 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:50:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:50:47,522 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:50:47,522 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:50:47,522 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:50:47,522 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:50:47,522 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:50:47,522 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:50:47,522 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:50:47,522 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:50:47,523 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:50:47,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:50:47,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:50:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:50:47,527 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:50:47,712 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:50:47,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:50:48,927 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:50:48,939 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:50:48,940 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:50:48,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:48 BoogieIcfgContainer [2021-11-19 14:50:48,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:50:48,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:50:48,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:50:48,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:50:48,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:50:45" (1/3) ... [2021-11-19 14:50:48,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48824799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:48, skipping insertion in model container [2021-11-19 14:50:48,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:47" (2/3) ... [2021-11-19 14:50:48,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48824799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:48, skipping insertion in model container [2021-11-19 14:50:48,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:48" (3/3) ... [2021-11-19 14:50:48,950 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2021-11-19 14:50:48,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:50:48,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:50:49,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:50:49,037 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 [2021-11-19 14:50:49,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:50:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 554 states, 435 states have (on average 1.696551724137931) internal successors, (738), 456 states have internal predecessors, (738), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:50:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:50:49,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:49,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:49,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash 352801324, now seen corresponding path program 1 times [2021-11-19 14:50:49,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:49,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177369287] [2021-11-19 14:50:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:49,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:49,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:49,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:50:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:50:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:49,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:50,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:50,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177369287] [2021-11-19 14:50:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177369287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:50,206 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:50,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:50:50,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138945899] [2021-11-19 14:50:50,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:50,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:50:50,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:50:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:50,256 INFO L87 Difference]: Start difference. First operand has 554 states, 435 states have (on average 1.696551724137931) internal successors, (738), 456 states have internal predecessors, (738), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 14:50:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:50,372 INFO L93 Difference]: Finished difference Result 575 states and 956 transitions. [2021-11-19 14:50:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:50:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2021-11-19 14:50:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:50,420 INFO L225 Difference]: With dead ends: 575 [2021-11-19 14:50:50,421 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:50:50,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:50,438 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:50,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:50:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:50:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6946386946386947) internal successors, (727), 448 states have internal predecessors, (727), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 910 transitions. [2021-11-19 14:50:50,557 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 910 transitions. Word has length 102 [2021-11-19 14:50:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:50,559 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 910 transitions. [2021-11-19 14:50:50,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 14:50:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 910 transitions. [2021-11-19 14:50:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:50:50,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:50,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:50,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:50,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:50,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1438904704, now seen corresponding path program 1 times [2021-11-19 14:50:50,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:50,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949220992] [2021-11-19 14:50:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:50,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:50,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:50,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:50:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:51,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:51,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949220992] [2021-11-19 14:50:51,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949220992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:51,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:51,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:50:51,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727392047] [2021-11-19 14:50:51,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:51,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:50:51,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:50:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:51,731 INFO L87 Difference]: Start difference. First operand 546 states and 910 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:50:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:51,898 INFO L93 Difference]: Finished difference Result 1076 states and 1798 transitions. [2021-11-19 14:50:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 104 [2021-11-19 14:50:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:51,907 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 14:50:51,908 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:50:51,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:51,918 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 15 mSDsluCounter, 3578 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4475 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:51,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4475 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:50:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:50:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6806526806526807) internal successors, (721), 448 states have internal predecessors, (721), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 904 transitions. [2021-11-19 14:50:51,980 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 904 transitions. Word has length 104 [2021-11-19 14:50:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:51,982 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 904 transitions. [2021-11-19 14:50:51,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 14:50:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 904 transitions. [2021-11-19 14:50:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:50:51,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:51,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:52,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:52,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:52,213 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1716833152, now seen corresponding path program 1 times [2021-11-19 14:50:52,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:52,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229488462] [2021-11-19 14:50:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:52,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:52,216 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:50:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:52,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:53,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:53,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229488462] [2021-11-19 14:50:53,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229488462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:53,245 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:53,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:50:53,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023207348] [2021-11-19 14:50:53,246 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:53,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:50:53,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:50:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:53,248 INFO L87 Difference]: Start difference. First operand 546 states and 904 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:50:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:53,445 INFO L93 Difference]: Finished difference Result 1034 states and 1715 transitions. [2021-11-19 14:50:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 109 [2021-11-19 14:50:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:53,455 INFO L225 Difference]: With dead ends: 1034 [2021-11-19 14:50:53,455 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:50:53,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:53,464 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 117 mSDsluCounter, 7030 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7921 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:53,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 7921 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:50:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 14:50:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.673758865248227) internal successors, (708), 442 states have internal predecessors, (708), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 891 transitions. [2021-11-19 14:50:53,514 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 891 transitions. Word has length 109 [2021-11-19 14:50:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:53,515 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 891 transitions. [2021-11-19 14:50:53,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:50:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 891 transitions. [2021-11-19 14:50:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 14:50:53,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:53,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:53,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:53,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:53,739 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash 565088311, now seen corresponding path program 1 times [2021-11-19 14:50:53,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:53,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563246731] [2021-11-19 14:50:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:53,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:53,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:53,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:53,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:50:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:54,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:54,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:54,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563246731] [2021-11-19 14:50:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563246731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:54,672 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:54,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:50:54,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188332279] [2021-11-19 14:50:54,673 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:50:54,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:50:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:54,677 INFO L87 Difference]: Start difference. First operand 540 states and 891 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:50:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:54,859 INFO L93 Difference]: Finished difference Result 1037 states and 1716 transitions. [2021-11-19 14:50:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 110 [2021-11-19 14:50:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:54,865 INFO L225 Difference]: With dead ends: 1037 [2021-11-19 14:50:54,865 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:50:54,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:54,875 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 121 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:54,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3331 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:50:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 14:50:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6170212765957446) internal successors, (684), 442 states have internal predecessors, (684), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 867 transitions. [2021-11-19 14:50:54,910 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 867 transitions. Word has length 110 [2021-11-19 14:50:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:54,911 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 867 transitions. [2021-11-19 14:50:54,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:50:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 867 transitions. [2021-11-19 14:50:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:50:54,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:54,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:54,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:55,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:55,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash 124965308, now seen corresponding path program 1 times [2021-11-19 14:50:55,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:55,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673984033] [2021-11-19 14:50:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:55,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:55,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:55,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:50:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:55,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:56,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:56,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673984033] [2021-11-19 14:50:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673984033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:56,156 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:50:56,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322857110] [2021-11-19 14:50:56,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:56,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:56,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:56,158 INFO L87 Difference]: Start difference. First operand 540 states and 867 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:50:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:56,276 INFO L93 Difference]: Finished difference Result 1028 states and 1678 transitions. [2021-11-19 14:50:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 112 [2021-11-19 14:50:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:56,283 INFO L225 Difference]: With dead ends: 1028 [2021-11-19 14:50:56,283 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 14:50:56,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:56,287 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 147 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4250 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:56,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4250 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 14:50:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-19 14:50:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 402 states have (on average 1.6393034825870647) internal successors, (659), 421 states have internal predecessors, (659), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 842 transitions. [2021-11-19 14:50:56,315 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 842 transitions. Word has length 112 [2021-11-19 14:50:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:56,315 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 842 transitions. [2021-11-19 14:50:56,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:50:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 842 transitions. [2021-11-19 14:50:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:50:56,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:56,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:56,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:56,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:56,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2098672499, now seen corresponding path program 1 times [2021-11-19 14:50:56,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:56,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849349174] [2021-11-19 14:50:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:56,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:56,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:56,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:56,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:50:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:57,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:57,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:57,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849349174] [2021-11-19 14:50:57,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849349174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:57,736 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:57,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:57,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946937262] [2021-11-19 14:50:57,736 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:57,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:57,738 INFO L87 Difference]: Start difference. First operand 519 states and 842 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:50:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:57,940 INFO L93 Difference]: Finished difference Result 1001 states and 1642 transitions. [2021-11-19 14:50:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:50:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 115 [2021-11-19 14:50:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:57,946 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 14:50:57,946 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 14:50:57,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:50:57,950 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 31 mSDsluCounter, 8232 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9059 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:57,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 9059 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 14:50:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-19 14:50:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 402 states have (on average 1.63681592039801) internal successors, (658), 421 states have internal predecessors, (658), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 841 transitions. [2021-11-19 14:50:57,975 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 841 transitions. Word has length 115 [2021-11-19 14:50:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:57,976 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 841 transitions. [2021-11-19 14:50:57,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:50:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 841 transitions. [2021-11-19 14:50:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:50:57,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:57,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:58,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:58,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1592009706, now seen corresponding path program 1 times [2021-11-19 14:50:58,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:58,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289440311] [2021-11-19 14:50:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:58,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:58,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:58,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:50:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:50:58,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:50:59,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:59,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289440311] [2021-11-19 14:50:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289440311] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:59,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:59,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:50:59,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013368303] [2021-11-19 14:50:59,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:59,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:50:59,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:50:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:59,312 INFO L87 Difference]: Start difference. First operand 519 states and 841 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:00,153 INFO L93 Difference]: Finished difference Result 997 states and 1659 transitions. [2021-11-19 14:51:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-11-19 14:51:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:00,160 INFO L225 Difference]: With dead ends: 997 [2021-11-19 14:51:00,160 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 14:51:00,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:00,165 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 780 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:00,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2096 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:51:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 14:51:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-19 14:51:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 405 states have (on average 1.6320987654320989) internal successors, (661), 424 states have internal predecessors, (661), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (90), 87 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 14:51:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 845 transitions. [2021-11-19 14:51:00,197 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 845 transitions. Word has length 116 [2021-11-19 14:51:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:00,198 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 845 transitions. [2021-11-19 14:51:00,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 845 transitions. [2021-11-19 14:51:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:51:00,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:00,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:00,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:00,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:00,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1378529686, now seen corresponding path program 1 times [2021-11-19 14:51:00,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764384490] [2021-11-19 14:51:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:00,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:00,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:51:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:01,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:01,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:01,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764384490] [2021-11-19 14:51:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764384490] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:01,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:01,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001849720] [2021-11-19 14:51:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:01,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:01,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:01,542 INFO L87 Difference]: Start difference. First operand 523 states and 845 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:02,344 INFO L93 Difference]: Finished difference Result 1006 states and 1666 transitions. [2021-11-19 14:51:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-19 14:51:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:02,350 INFO L225 Difference]: With dead ends: 1006 [2021-11-19 14:51:02,351 INFO L226 Difference]: Without dead ends: 528 [2021-11-19 14:51:02,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:02,355 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 777 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:02,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 2097 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:51:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-19 14:51:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-19 14:51:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 409 states have (on average 1.625916870415648) internal successors, (665), 428 states have internal predecessors, (665), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (91), 87 states have call predecessors, (91), 89 states have call successors, (91) [2021-11-19 14:51:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 850 transitions. [2021-11-19 14:51:02,385 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 850 transitions. Word has length 118 [2021-11-19 14:51:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 850 transitions. [2021-11-19 14:51:02,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 850 transitions. [2021-11-19 14:51:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:51:02,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:02,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:02,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-19 14:51:02,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:02,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -190837098, now seen corresponding path program 1 times [2021-11-19 14:51:02,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:02,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443596072] [2021-11-19 14:51:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:02,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:02,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:02,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:02,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:51:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:02,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:03,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:03,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443596072] [2021-11-19 14:51:03,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443596072] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:03,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:03,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:03,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793780495] [2021-11-19 14:51:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:03,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:03,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:03,790 INFO L87 Difference]: Start difference. First operand 528 states and 850 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:04,515 INFO L93 Difference]: Finished difference Result 1017 states and 1675 transitions. [2021-11-19 14:51:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 14:51:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:04,521 INFO L225 Difference]: With dead ends: 1017 [2021-11-19 14:51:04,521 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:51:04,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:04,526 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 790 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:04,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2097 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:51:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:51:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-19 14:51:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 414 states have (on average 1.6183574879227054) internal successors, (670), 433 states have internal predecessors, (670), 94 states have call successors, (94), 26 states have call predecessors, (94), 25 states have return successors, (92), 87 states have call predecessors, (92), 89 states have call successors, (92) [2021-11-19 14:51:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 856 transitions. [2021-11-19 14:51:04,554 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 856 transitions. Word has length 120 [2021-11-19 14:51:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:04,555 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 856 transitions. [2021-11-19 14:51:04,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 856 transitions. [2021-11-19 14:51:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:51:04,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:04,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:04,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:04,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:04,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 14217570, now seen corresponding path program 1 times [2021-11-19 14:51:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:04,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940038721] [2021-11-19 14:51:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:04,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:04,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:04,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:51:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:05,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:51:05,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940038721] [2021-11-19 14:51:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940038721] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:05,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660881475] [2021-11-19 14:51:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:05,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:05,953 INFO L87 Difference]: Start difference. First operand 534 states and 856 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:06,653 INFO L93 Difference]: Finished difference Result 1030 states and 1686 transitions. [2021-11-19 14:51:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-19 14:51:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:06,659 INFO L225 Difference]: With dead ends: 1030 [2021-11-19 14:51:06,659 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 14:51:06,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:06,663 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 779 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:06,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2097 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:51:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 14:51:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 14:51:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 420 states have (on average 1.6095238095238096) internal successors, (676), 439 states have internal predecessors, (676), 94 states have call successors, (94), 27 states have call predecessors, (94), 26 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-19 14:51:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 863 transitions. [2021-11-19 14:51:06,708 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 863 transitions. Word has length 122 [2021-11-19 14:51:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:06,708 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 863 transitions. [2021-11-19 14:51:06,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:51:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 863 transitions. [2021-11-19 14:51:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:51:06,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:06,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:06,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:06,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:06,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1252982550, now seen corresponding path program 1 times [2021-11-19 14:51:06,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:06,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534349264] [2021-11-19 14:51:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:06,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:06,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:06,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:06,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:51:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:07,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:51:07,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:51:08,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:08,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534349264] [2021-11-19 14:51:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534349264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:08,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [469515117] [2021-11-19 14:51:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:08,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:08,563 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:08,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:51:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:08,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:09,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:09,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [469515117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:09,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:09,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114418438] [2021-11-19 14:51:09,636 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:09,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:09,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:09,637 INFO L87 Difference]: Start difference. First operand 541 states and 863 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:11,728 INFO L93 Difference]: Finished difference Result 1666 states and 2742 transitions. [2021-11-19 14:51:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:51:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 124 [2021-11-19 14:51:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:11,740 INFO L225 Difference]: With dead ends: 1666 [2021-11-19 14:51:11,740 INFO L226 Difference]: Without dead ends: 1170 [2021-11-19 14:51:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:11,745 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 3069 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3145 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:11,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3145 Valid, 1294 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:51:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-11-19 14:51:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1111. [2021-11-19 14:51:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 849 states have (on average 1.6266195524146054) internal successors, (1381), 888 states have internal predecessors, (1381), 210 states have call successors, (210), 49 states have call predecessors, (210), 51 states have return successors, (235), 204 states have call predecessors, (235), 205 states have call successors, (235) [2021-11-19 14:51:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1826 transitions. [2021-11-19 14:51:11,853 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1826 transitions. Word has length 124 [2021-11-19 14:51:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:11,854 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1826 transitions. [2021-11-19 14:51:11,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1826 transitions. [2021-11-19 14:51:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:51:11,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:11,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:11,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:12,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-19 14:51:12,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:12,275 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash 187618681, now seen corresponding path program 1 times [2021-11-19 14:51:12,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:12,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366653985] [2021-11-19 14:51:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:12,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:12,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:12,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:51:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:51:13,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:51:13,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:13,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366653985] [2021-11-19 14:51:13,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366653985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:13,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495480775] [2021-11-19 14:51:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:13,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:13,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:13,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:13,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:51:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:14,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [495480775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:14,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:14,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:14,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902447774] [2021-11-19 14:51:14,873 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:14,875 INFO L87 Difference]: Start difference. First operand 1111 states and 1826 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:16,870 INFO L93 Difference]: Finished difference Result 3594 states and 6078 transitions. [2021-11-19 14:51:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:51:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 125 [2021-11-19 14:51:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:16,895 INFO L225 Difference]: With dead ends: 3594 [2021-11-19 14:51:16,896 INFO L226 Difference]: Without dead ends: 2528 [2021-11-19 14:51:16,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:16,905 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1927 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2002 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:16,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2002 Valid, 1371 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:51:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-11-19 14:51:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2403. [2021-11-19 14:51:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 1798 states have (on average 1.6301446051167965) internal successors, (2931), 1887 states have internal predecessors, (2931), 500 states have call successors, (500), 93 states have call predecessors, (500), 104 states have return successors, (634), 498 states have call predecessors, (634), 495 states have call successors, (634) [2021-11-19 14:51:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4065 transitions. [2021-11-19 14:51:17,089 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4065 transitions. Word has length 125 [2021-11-19 14:51:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:17,089 INFO L470 AbstractCegarLoop]: Abstraction has 2403 states and 4065 transitions. [2021-11-19 14:51:17,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4065 transitions. [2021-11-19 14:51:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:51:17,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:17,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:17,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:17,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:17,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:17,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1521081016, now seen corresponding path program 1 times [2021-11-19 14:51:17,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:17,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459878614] [2021-11-19 14:51:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:17,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:17,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:17,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:51:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:51:18,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:51:19,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:19,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459878614] [2021-11-19 14:51:19,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459878614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:19,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171016622] [2021-11-19 14:51:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:19,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:19,159 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:19,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:51:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:19,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:20,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171016622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:20,170 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:20,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576429773] [2021-11-19 14:51:20,171 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:20,173 INFO L87 Difference]: Start difference. First operand 2403 states and 4065 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:22,370 INFO L93 Difference]: Finished difference Result 8026 states and 14066 transitions. [2021-11-19 14:51:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:51:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 126 [2021-11-19 14:51:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:22,438 INFO L225 Difference]: With dead ends: 8026 [2021-11-19 14:51:22,438 INFO L226 Difference]: Without dead ends: 5668 [2021-11-19 14:51:22,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:22,464 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 1854 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1928 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1928 Valid, 1508 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:51:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-11-19 14:51:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5411. [2021-11-19 14:51:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5411 states, 3950 states have (on average 1.6250632911392404) internal successors, (6419), 4166 states have internal predecessors, (6419), 1242 states have call successors, (1242), 181 states have call predecessors, (1242), 218 states have return successors, (1805), 1254 states have call predecessors, (1805), 1237 states have call successors, (1805) [2021-11-19 14:51:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5411 states to 5411 states and 9466 transitions. [2021-11-19 14:51:22,948 INFO L78 Accepts]: Start accepts. Automaton has 5411 states and 9466 transitions. Word has length 126 [2021-11-19 14:51:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:22,949 INFO L470 AbstractCegarLoop]: Abstraction has 5411 states and 9466 transitions. [2021-11-19 14:51:22,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5411 states and 9466 transitions. [2021-11-19 14:51:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:51:22,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:22,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:22,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:23,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:23,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:23,374 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -91255653, now seen corresponding path program 1 times [2021-11-19 14:51:23,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:23,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927638160] [2021-11-19 14:51:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:23,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:23,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:23,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:51:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:51:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:51:24,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:24,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927638160] [2021-11-19 14:51:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927638160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:24,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579896542] [2021-11-19 14:51:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:24,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:24,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:24,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:24,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:51:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:25,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:25,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579896542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:25,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:25,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:25,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365514409] [2021-11-19 14:51:25,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:25,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:25,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:25,799 INFO L87 Difference]: Start difference. First operand 5411 states and 9466 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:28,318 INFO L93 Difference]: Finished difference Result 18474 states and 34098 transitions. [2021-11-19 14:51:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:51:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 127 [2021-11-19 14:51:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:28,540 INFO L225 Difference]: With dead ends: 18474 [2021-11-19 14:51:28,540 INFO L226 Difference]: Without dead ends: 13108 [2021-11-19 14:51:28,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:28,588 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 3052 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3125 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:28,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3125 Valid, 1254 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:51:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2021-11-19 14:51:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 12615. [2021-11-19 14:51:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12615 states, 8970 states have (on average 1.6146042363433668) internal successors, (14483), 9513 states have internal predecessors, (14483), 3176 states have call successors, (3176), 357 states have call predecessors, (3176), 468 states have return successors, (5386), 3234 states have call predecessors, (5386), 3171 states have call successors, (5386) [2021-11-19 14:51:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12615 states to 12615 states and 23045 transitions. [2021-11-19 14:51:29,702 INFO L78 Accepts]: Start accepts. Automaton has 12615 states and 23045 transitions. Word has length 127 [2021-11-19 14:51:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 12615 states and 23045 transitions. [2021-11-19 14:51:29,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 12615 states and 23045 transitions. [2021-11-19 14:51:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:51:29,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:29,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:29,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 14:51:29,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 14:51:30,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:30,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1465919066, now seen corresponding path program 1 times [2021-11-19 14:51:30,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:30,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048681834] [2021-11-19 14:51:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:30,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:30,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:30,115 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:51:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:51:30,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:51:31,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:31,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048681834] [2021-11-19 14:51:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048681834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:31,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388655005] [2021-11-19 14:51:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:31,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:31,662 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:31,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:51:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:32,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:51:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388655005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:32,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:32,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:32,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122768180] [2021-11-19 14:51:32,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:32,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:32,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:32,633 INFO L87 Difference]: Start difference. First operand 12615 states and 23045 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:36,283 INFO L93 Difference]: Finished difference Result 43715 states and 87275 transitions. [2021-11-19 14:51:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:51:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 128 [2021-11-19 14:51:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:36,604 INFO L225 Difference]: With dead ends: 43715 [2021-11-19 14:51:36,605 INFO L226 Difference]: Without dead ends: 31135 [2021-11-19 14:51:36,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:36,787 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1825 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:36,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1897 Valid, 1586 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:51:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31135 states. [2021-11-19 14:51:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31135 to 30344. [2021-11-19 14:51:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30344 states, 21029 states have (on average 1.6007893860858815) internal successors, (33663), 22423 states have internal predecessors, (33663), 8286 states have call successors, (8286), 708 states have call predecessors, (8286), 1028 states have return successors, (16828), 8489 states have call predecessors, (16828), 8281 states have call successors, (16828) [2021-11-19 14:51:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30344 states to 30344 states and 58777 transitions. [2021-11-19 14:51:39,408 INFO L78 Accepts]: Start accepts. Automaton has 30344 states and 58777 transitions. Word has length 128 [2021-11-19 14:51:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:39,408 INFO L470 AbstractCegarLoop]: Abstraction has 30344 states and 58777 transitions. [2021-11-19 14:51:39,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:51:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30344 states and 58777 transitions. [2021-11-19 14:51:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:51:39,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:39,446 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:39,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:51:39,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:39,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:39,865 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash -608900740, now seen corresponding path program 1 times [2021-11-19 14:51:39,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:39,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612076102] [2021-11-19 14:51:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:39,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:39,868 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:39,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:51:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:51:40,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:51:40,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:51:41,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:41,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612076102] [2021-11-19 14:51:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612076102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:41,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:41,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 14:51:41,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506231314] [2021-11-19 14:51:41,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:41,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:51:41,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:41,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:51:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:51:41,651 INFO L87 Difference]: Start difference. First operand 30344 states and 58777 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 12 states have internal predecessors, (140), 6 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 10 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 14:52:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:03,893 INFO L93 Difference]: Finished difference Result 192735 states and 427295 transitions. [2021-11-19 14:52:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 14:52:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 12 states have internal predecessors, (140), 6 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 10 states have call predecessors, (27), 5 states have call successors, (27) Word has length 183 [2021-11-19 14:52:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:06,708 INFO L225 Difference]: With dead ends: 192735 [2021-11-19 14:52:06,708 INFO L226 Difference]: Without dead ends: 162436 [2021-11-19 14:52:07,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 14:52:07,214 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 7712 mSDsluCounter, 6106 mSDsCounter, 0 mSdLazyCounter, 11364 mSolverCounterSat, 3186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7746 SdHoareTripleChecker+Valid, 7920 SdHoareTripleChecker+Invalid, 14550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3186 IncrementalHoareTripleChecker+Valid, 11364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:07,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7746 Valid, 7920 Invalid, 14550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3186 Valid, 11364 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-19 14:52:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162436 states. [2021-11-19 14:52:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162436 to 125676. [2021-11-19 14:52:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125676 states, 83532 states have (on average 1.5786165780778625) internal successors, (131865), 89810 states have internal predecessors, (131865), 38352 states have call successors, (38352), 2115 states have call predecessors, (38352), 3791 states have return successors, (96440), 39623 states have call predecessors, (96440), 38347 states have call successors, (96440) [2021-11-19 14:52:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125676 states to 125676 states and 266657 transitions. [2021-11-19 14:52:21,245 INFO L78 Accepts]: Start accepts. Automaton has 125676 states and 266657 transitions. Word has length 183 [2021-11-19 14:52:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:21,246 INFO L470 AbstractCegarLoop]: Abstraction has 125676 states and 266657 transitions. [2021-11-19 14:52:21,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 12 states have internal predecessors, (140), 6 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 10 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 14:52:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 125676 states and 266657 transitions. [2021-11-19 14:52:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:52:21,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:21,376 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:21,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:21,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:21,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1229429645, now seen corresponding path program 1 times [2021-11-19 14:52:21,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:21,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195564822] [2021-11-19 14:52:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:21,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:21,598 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659d6a87-fe8b-43f0-8e17-3452670d3283/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:52:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:52:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:52:22,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:52:22,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:22,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195564822] [2021-11-19 14:52:22,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195564822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:22,925 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:22,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:52:22,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115440448] [2021-11-19 14:52:22,925 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:22,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:52:22,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:52:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:52:22,927 INFO L87 Difference]: Start difference. First operand 125676 states and 266657 transitions. Second operand has 10 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39)