./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:33:28,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:33:28,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:33:28,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:33:28,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:33:28,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:33:28,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:33:28,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:33:28,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:33:28,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:33:28,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:33:28,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:33:28,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:33:28,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:33:28,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:33:28,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:33:28,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:33:28,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:33:28,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:33:28,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:33:28,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:33:28,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:33:28,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:33:28,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:33:28,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:33:28,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:33:28,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:33:28,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:33:28,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:33:28,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:33:28,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:33:28,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:33:28,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:33:28,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:33:28,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:33:28,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:33:28,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:33:28,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:33:28,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:33:28,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:33:28,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:33:28,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:33:28,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:33:29,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:33:29,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:33:29,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:33:29,003 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:33:29,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:33:29,003 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:33:29,003 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:33:29,003 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:33:29,004 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:33:29,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:33:29,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:33:29,004 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:33:29,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:33:29,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:33:29,005 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:33:29,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:33:29,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:33:29,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:33:29,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:33:29,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:33:29,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:33:29,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:33:29,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:33:29,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:33:29,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:33:29,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:33:29,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:33:29,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:33:29,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:33:29,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:33:29,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:29,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:33:29,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:33:29,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:33:29,013 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:33:29,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:33:29,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:33:29,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:33:29,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:33:29,014 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-19 13:33:29,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:33:29,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:33:29,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:33:29,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:33:29,346 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:33:29,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-19 13:33:29,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/3f9726a9c/698b3b94f12146679ce74c6ab43497a8/FLAGeeccc46d5 [2021-11-19 13:33:30,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:33:30,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-19 13:33:30,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/3f9726a9c/698b3b94f12146679ce74c6ab43497a8/FLAGeeccc46d5 [2021-11-19 13:33:30,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/3f9726a9c/698b3b94f12146679ce74c6ab43497a8 [2021-11-19 13:33:30,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:33:30,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:33:30,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:30,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:33:30,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:33:30,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:30" (1/1) ... [2021-11-19 13:33:30,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614682c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:30, skipping insertion in model container [2021-11-19 13:33:30,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:30" (1/1) ... [2021-11-19 13:33:30,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:33:30,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:30,821 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-19 13:33:30,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:30,850 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 13:33:30,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d18a486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:30, skipping insertion in model container [2021-11-19 13:33:30,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:30,851 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:33:30,853 INFO L158 Benchmark]: Toolchain (without parser) took 633.70ms. Allocated memory is still 111.1MB. Free memory was 67.8MB in the beginning and 70.7MB in the end (delta: -2.8MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-19 13:33:30,854 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:33:30,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.67ms. Allocated memory is still 111.1MB. Free memory was 67.6MB in the beginning and 70.7MB in the end (delta: -3.1MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-19 13:33:30,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.67ms. Allocated memory is still 111.1MB. Free memory was 67.6MB in the beginning and 70.7MB in the end (delta: -3.1MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:33:33,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:33:33,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:33:33,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:33:33,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:33:33,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:33:33,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:33:33,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:33:33,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:33:33,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:33:33,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:33:33,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:33:33,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:33:33,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:33:33,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:33:33,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:33:33,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:33:33,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:33:33,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:33:33,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:33:33,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:33:33,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:33:33,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:33:33,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:33:33,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:33:33,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:33:33,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:33:33,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:33:33,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:33:33,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:33:33,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:33:33,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:33:33,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:33:33,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:33:33,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:33:33,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:33:33,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:33:33,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:33:33,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:33:33,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:33:33,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:33:33,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:33:33,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:33:33,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:33:33,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:33:33,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:33:33,312 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:33:33,313 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:33:33,313 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:33:33,313 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:33:33,314 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:33:33,315 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:33:33,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:33:33,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:33:33,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:33:33,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:33:33,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:33:33,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:33:33,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:33:33,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:33:33,319 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:33:33,319 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:33:33,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:33:33,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:33:33,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:33:33,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:33:33,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:33:33,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:33:33,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:33:33,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:33,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:33:33,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:33:33,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:33:33,322 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:33:33,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:33,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:33:33,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:33:33,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:33:33,324 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-19 13:33:33,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:33:33,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:33:33,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:33:33,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:33:33,778 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:33:33,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-19 13:33:33,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/593a60bb8/fea2c3b40a78446992cb342843a77a8d/FLAG787fa2f29 [2021-11-19 13:33:34,521 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:33:34,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-19 13:33:34,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/593a60bb8/fea2c3b40a78446992cb342843a77a8d/FLAG787fa2f29 [2021-11-19 13:33:34,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/data/593a60bb8/fea2c3b40a78446992cb342843a77a8d [2021-11-19 13:33:34,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:33:34,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:33:34,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:34,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:33:34,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:33:34,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:34" (1/1) ... [2021-11-19 13:33:34,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460ff328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:34, skipping insertion in model container [2021-11-19 13:33:34,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:34" (1/1) ... [2021-11-19 13:33:34,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:33:34,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:35,452 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-19 13:33:35,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:35,489 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:33:35,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:35,658 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-19 13:33:35,664 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:35,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:33:35,764 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_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-19 13:33:35,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:35,808 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:33:35,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35 WrapperNode [2021-11-19 13:33:35,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:35,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:33:35,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:33:35,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:33:35,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,915 INFO L137 Inliner]: procedures = 97, calls = 339, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1064 [2021-11-19 13:33:35,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:33:35,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:33:35,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:33:35,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:33:35,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:35,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:36,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:36,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:36,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:33:36,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:33:36,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:33:36,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:33:36,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (1/1) ... [2021-11-19 13:33:36,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:36,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:33:36,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:33:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:33:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:33:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:33:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:33:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:33:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:33:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:33:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:33:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:33:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:33:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:33:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:33:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:33:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:33:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:33:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:33:36,137 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:33:36,137 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:33:36,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:33:36,137 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:33:36,137 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:33:36,137 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:33:36,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:33:36,138 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:33:36,138 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:33:36,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:33:36,138 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:33:36,139 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:33:36,139 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:33:36,139 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:33:36,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:33:36,140 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:33:36,140 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:33:36,141 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:33:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:33:36,141 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:33:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:33:36,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:33:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:33:36,142 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:33:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-19 13:33:36,142 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-19 13:33:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:33:36,143 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:33:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:33:36,143 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:33:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:33:36,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:33:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:33:36,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:33:36,147 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:33:36,148 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:33:36,307 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:33:36,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:33:37,506 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:33:37,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:33:37,520 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:33:37,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:37 BoogieIcfgContainer [2021-11-19 13:33:37,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:33:37,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:33:37,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:33:37,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:33:37,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:33:34" (1/3) ... [2021-11-19 13:33:37,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b2792e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:37, skipping insertion in model container [2021-11-19 13:33:37,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:35" (2/3) ... [2021-11-19 13:33:37,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b2792e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:37, skipping insertion in model container [2021-11-19 13:33:37,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:37" (3/3) ... [2021-11-19 13:33:37,535 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2021-11-19 13:33:37,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:33:37,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:33:37,612 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:33:37,622 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 13:33:37,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:33:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 560 states, 441 states have (on average 1.6938775510204083) internal successors, (747), 462 states have internal predecessors, (747), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 13:33:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 13:33:37,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:37,716 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 13:33:37,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1552478491, now seen corresponding path program 1 times [2021-11-19 13:33:37,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:37,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749602418] [2021-11-19 13:33:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:37,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:37,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:37,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:33:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:33:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:38,520 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 13:33:38,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:38,830 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 13:33:38,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:38,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749602418] [2021-11-19 13:33:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749602418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:38,832 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:38,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:33:38,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293168591] [2021-11-19 13:33:38,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:38,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:33:38,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:33:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:33:38,879 INFO L87 Difference]: Start difference. First operand has 560 states, 441 states have (on average 1.6938775510204083) internal successors, (747), 462 states have internal predecessors, (747), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:33:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:38,994 INFO L93 Difference]: Finished difference Result 581 states and 963 transitions. [2021-11-19 13:33:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:33:38,998 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-19 13:33:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:39,038 INFO L225 Difference]: With dead ends: 581 [2021-11-19 13:33:39,038 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 13:33:39,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 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 13:33:39,047 INFO L933 BasicCegarLoop]: 924 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, 924 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 13:33:39,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 13:33:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 13:33:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 435 states have (on average 1.6919540229885057) internal successors, (736), 454 states have internal predecessors, (736), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 917 transitions. [2021-11-19 13:33:39,178 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 917 transitions. Word has length 104 [2021-11-19 13:33:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:39,182 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 917 transitions. [2021-11-19 13:33:39,182 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:33:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 917 transitions. [2021-11-19 13:33:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 13:33:39,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:39,196 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] [2021-11-19 13:33:39,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:39,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:39,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash -337581649, now seen corresponding path program 1 times [2021-11-19 13:33:39,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:39,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096145437] [2021-11-19 13:33:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:39,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:39,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:39,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:39,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:33:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:40,148 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 13:33:40,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:40,484 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 13:33:40,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:40,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096145437] [2021-11-19 13:33:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096145437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:40,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:40,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:40,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145840580] [2021-11-19 13:33:40,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:40,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:40,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:40,495 INFO L87 Difference]: Start difference. First operand 552 states and 917 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:33:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:40,634 INFO L93 Difference]: Finished difference Result 1088 states and 1812 transitions. [2021-11-19 13:33:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:40,634 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-19 13:33:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:40,642 INFO L225 Difference]: With dead ends: 1088 [2021-11-19 13:33:40,642 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 13:33:40,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:40,652 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 30 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:40,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1807 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 13:33:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 13:33:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 435 states have (on average 1.6781609195402298) internal successors, (730), 454 states have internal predecessors, (730), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 911 transitions. [2021-11-19 13:33:40,715 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 911 transitions. Word has length 106 [2021-11-19 13:33:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:40,716 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 911 transitions. [2021-11-19 13:33:40,717 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:33:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 911 transitions. [2021-11-19 13:33:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:33:40,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:40,726 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] [2021-11-19 13:33:40,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:40,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:40,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1686269851, now seen corresponding path program 1 times [2021-11-19 13:33:40,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:40,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905874709] [2021-11-19 13:33:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:40,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:40,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:40,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:33:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:41,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:41,568 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 13:33:41,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:42,039 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 13:33:42,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:42,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905874709] [2021-11-19 13:33:42,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905874709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:42,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:42,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:33:42,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378994210] [2021-11-19 13:33:42,043 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:42,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:33:42,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:33:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:42,047 INFO L87 Difference]: Start difference. First operand 552 states and 911 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:33:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:42,247 INFO L93 Difference]: Finished difference Result 1046 states and 1729 transitions. [2021-11-19 13:33:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:42,249 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-19 13:33:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:42,256 INFO L225 Difference]: With dead ends: 1046 [2021-11-19 13:33:42,256 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 13:33:42,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 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 13:33:42,264 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 213 mSDsluCounter, 5365 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 6263 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:42,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 6263 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 13:33:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 13:33:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6713286713286712) internal successors, (717), 448 states have internal predecessors, (717), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 898 transitions. [2021-11-19 13:33:42,310 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 898 transitions. Word has length 111 [2021-11-19 13:33:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:42,311 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 898 transitions. [2021-11-19 13:33:42,312 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:33:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 898 transitions. [2021-11-19 13:33:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:33:42,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:42,321 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] [2021-11-19 13:33:42,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:42,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:42,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1288531394, now seen corresponding path program 1 times [2021-11-19 13:33:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:42,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240252938] [2021-11-19 13:33:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:42,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:42,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:42,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:33:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:43,035 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 13:33:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:43,438 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 13:33:43,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:43,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240252938] [2021-11-19 13:33:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240252938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:43,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:43,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:43,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596908034] [2021-11-19 13:33:43,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:43,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:43,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:43,441 INFO L87 Difference]: Start difference. First operand 546 states and 898 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:33:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:43,611 INFO L93 Difference]: Finished difference Result 1049 states and 1730 transitions. [2021-11-19 13:33:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:43,612 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-19 13:33:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:43,617 INFO L225 Difference]: With dead ends: 1049 [2021-11-19 13:33:43,618 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 13:33:43,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 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 13:33:43,622 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 215 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:43,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1709 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 13:33:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 13:33:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 429 states have (on average 1.6153846153846154) internal successors, (693), 448 states have internal predecessors, (693), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 874 transitions. [2021-11-19 13:33:43,651 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 874 transitions. Word has length 112 [2021-11-19 13:33:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 874 transitions. [2021-11-19 13:33:43,652 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:33:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 874 transitions. [2021-11-19 13:33:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:33:43,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:43,657 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] [2021-11-19 13:33:43,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:43,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:43,864 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2040769863, now seen corresponding path program 1 times [2021-11-19 13:33:43,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:43,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177418638] [2021-11-19 13:33:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:43,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:43,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:43,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:43,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:33:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:44,418 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 13:33:44,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:44,900 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 13:33:44,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:44,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177418638] [2021-11-19 13:33:44,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177418638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:44,901 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:44,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:33:44,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106267124] [2021-11-19 13:33:44,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:44,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:44,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:44,903 INFO L87 Difference]: Start difference. First operand 546 states and 874 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:33:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:45,035 INFO L93 Difference]: Finished difference Result 1040 states and 1692 transitions. [2021-11-19 13:33:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:45,037 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-19 13:33:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:45,042 INFO L225 Difference]: With dead ends: 1040 [2021-11-19 13:33:45,042 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 13:33:45,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 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 13:33:45,046 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 147 mSDsluCounter, 3423 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4285 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 13:33:45,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4285 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 13:33:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 13:33:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6372549019607843) internal successors, (668), 427 states have internal predecessors, (668), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 849 transitions. [2021-11-19 13:33:45,074 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 849 transitions. Word has length 114 [2021-11-19 13:33:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 849 transitions. [2021-11-19 13:33:45,075 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, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:33:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 849 transitions. [2021-11-19 13:33:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:33:45,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:45,080 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, 1] [2021-11-19 13:33:45,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:45,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:45,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1616324494, now seen corresponding path program 1 times [2021-11-19 13:33:45,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:45,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059640574] [2021-11-19 13:33:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:45,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:45,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:45,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:45,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:33:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:33:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:45,927 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 13:33:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:46,499 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 13:33:46,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:46,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059640574] [2021-11-19 13:33:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059640574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:46,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:46,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:33:46,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307555868] [2021-11-19 13:33:46,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:46,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:33:46,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:33:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:33:46,502 INFO L87 Difference]: Start difference. First operand 525 states and 849 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:33:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:46,708 INFO L93 Difference]: Finished difference Result 1013 states and 1656 transitions. [2021-11-19 13:33:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:33:46,709 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 13:33:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:46,714 INFO L225 Difference]: With dead ends: 1013 [2021-11-19 13:33:46,714 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 13:33:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 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 13:33:46,719 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 44 mSDsluCounter, 7471 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8305 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8305 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 13:33:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 13:33:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6348039215686274) internal successors, (667), 427 states have internal predecessors, (667), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 13:33:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 848 transitions. [2021-11-19 13:33:46,744 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 848 transitions. Word has length 117 [2021-11-19 13:33:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:46,745 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 848 transitions. [2021-11-19 13:33:46,745 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, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 13:33:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 848 transitions. [2021-11-19 13:33:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:33:46,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:46,750 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, 1, 1] [2021-11-19 13:33:46,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:46,968 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2079240097, now seen corresponding path program 1 times [2021-11-19 13:33:46,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:46,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510375420] [2021-11-19 13:33:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:46,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:46,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:33:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:47,615 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 13:33:47,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:48,103 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 13:33:48,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:48,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510375420] [2021-11-19 13:33:48,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510375420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:48,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621557295] [2021-11-19 13:33:48,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:48,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:48,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:48,105 INFO L87 Difference]: Start difference. First operand 525 states and 848 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:48,969 INFO L93 Difference]: Finished difference Result 1009 states and 1673 transitions. [2021-11-19 13:33:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:48,970 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-19 13:33:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:48,975 INFO L225 Difference]: With dead ends: 1009 [2021-11-19 13:33:48,975 INFO L226 Difference]: Without dead ends: 529 [2021-11-19 13:33:48,983 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 13:33:48,984 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 784 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:48,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2121 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:33:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-19 13:33:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-19 13:33:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.6301703163017032) internal successors, (670), 430 states have internal predecessors, (670), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (89), 86 states have call predecessors, (89), 88 states have call successors, (89) [2021-11-19 13:33:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 852 transitions. [2021-11-19 13:33:49,018 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 852 transitions. Word has length 118 [2021-11-19 13:33:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:49,019 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 852 transitions. [2021-11-19 13:33:49,019 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 852 transitions. [2021-11-19 13:33:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:33:49,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:49,024 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, 1, 1] [2021-11-19 13:33:49,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:49,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1280737071, now seen corresponding path program 1 times [2021-11-19 13:33:49,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:49,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505690443] [2021-11-19 13:33:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:49,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:49,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:49,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:33:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:49,897 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 13:33:49,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:50,397 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 13:33:50,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505690443] [2021-11-19 13:33:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505690443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:50,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:50,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:50,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448610143] [2021-11-19 13:33:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:50,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:50,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:50,400 INFO L87 Difference]: Start difference. First operand 529 states and 852 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:51,218 INFO L93 Difference]: Finished difference Result 1018 states and 1680 transitions. [2021-11-19 13:33:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:51,219 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-19 13:33:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:51,229 INFO L225 Difference]: With dead ends: 1018 [2021-11-19 13:33:51,229 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 13:33:51,233 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 13:33:51,237 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 797 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:51,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2122 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:33:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 13:33:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-19 13:33:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 415 states have (on average 1.6240963855421686) internal successors, (674), 434 states have internal predecessors, (674), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (90), 86 states have call predecessors, (90), 88 states have call successors, (90) [2021-11-19 13:33:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 857 transitions. [2021-11-19 13:33:51,310 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 857 transitions. Word has length 120 [2021-11-19 13:33:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:51,311 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 857 transitions. [2021-11-19 13:33:51,311 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 857 transitions. [2021-11-19 13:33:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 13:33:51,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:51,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:51,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:51,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:51,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash -316300383, now seen corresponding path program 1 times [2021-11-19 13:33:51,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:51,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096344631] [2021-11-19 13:33:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:51,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:51,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:51,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:33:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:52,156 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 13:33:52,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:52,655 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 13:33:52,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:52,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096344631] [2021-11-19 13:33:52,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096344631] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:52,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:52,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401551224] [2021-11-19 13:33:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:52,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:52,657 INFO L87 Difference]: Start difference. First operand 534 states and 857 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:53,410 INFO L93 Difference]: Finished difference Result 1029 states and 1689 transitions. [2021-11-19 13:33:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:53,411 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-19 13:33:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:53,417 INFO L225 Difference]: With dead ends: 1029 [2021-11-19 13:33:53,417 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 13:33:53,421 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 13:33:53,422 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 785 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:53,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2122 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:33:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 13:33:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 13:33:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 420 states have (on average 1.6166666666666667) internal successors, (679), 439 states have internal predecessors, (679), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (91), 86 states have call predecessors, (91), 88 states have call successors, (91) [2021-11-19 13:33:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 863 transitions. [2021-11-19 13:33:53,481 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 863 transitions. Word has length 122 [2021-11-19 13:33:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 863 transitions. [2021-11-19 13:33:53,483 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 863 transitions. [2021-11-19 13:33:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 13:33:53,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:53,490 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, 1, 1] [2021-11-19 13:33:53,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:53,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:53,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 492353319, now seen corresponding path program 1 times [2021-11-19 13:33:53,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:53,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769094414] [2021-11-19 13:33:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:53,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:53,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:53,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:33:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:54,336 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 13:33:54,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:54,844 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 13:33:54,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:54,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769094414] [2021-11-19 13:33:54,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769094414] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:54,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:54,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:54,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504300945] [2021-11-19 13:33:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:54,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:54,846 INFO L87 Difference]: Start difference. First operand 540 states and 863 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:55,544 INFO L93 Difference]: Finished difference Result 1042 states and 1700 transitions. [2021-11-19 13:33:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:55,547 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-19 13:33:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:55,570 INFO L225 Difference]: With dead ends: 1042 [2021-11-19 13:33:55,570 INFO L226 Difference]: Without dead ends: 547 [2021-11-19 13:33:55,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 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 13:33:55,574 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 789 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:55,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2122 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:33:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-19 13:33:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-19 13:33:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 426 states have (on average 1.607981220657277) internal successors, (685), 445 states have internal predecessors, (685), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-11-19 13:33:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 870 transitions. [2021-11-19 13:33:55,605 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 870 transitions. Word has length 124 [2021-11-19 13:33:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:55,606 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 870 transitions. [2021-11-19 13:33:55,606 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 870 transitions. [2021-11-19 13:33:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:33:55,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:55,611 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 13:33:55,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:55,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:55,827 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -547691103, now seen corresponding path program 1 times [2021-11-19 13:33:55,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:55,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600901324] [2021-11-19 13:33:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:55,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:55,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:55,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:55,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:33:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:33:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:56,759 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 13:33:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:57,807 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 13:33:57,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:57,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600901324] [2021-11-19 13:33:57,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600901324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:57,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [581675470] [2021-11-19 13:33:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:57,808 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:57,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:57,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:57,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 13:33:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:33:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:58,410 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 13:33:58,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:58,747 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 13:33:58,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [581675470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:58,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:33:58,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:33:58,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633590198] [2021-11-19 13:33:58,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:58,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:33:58,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:33:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:33:58,751 INFO L87 Difference]: Start difference. First operand 547 states and 870 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:33:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:58,860 INFO L93 Difference]: Finished difference Result 1542 states and 2509 transitions. [2021-11-19 13:33:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:33:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 126 [2021-11-19 13:33:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:58,880 INFO L225 Difference]: With dead ends: 1542 [2021-11-19 13:33:58,880 INFO L226 Difference]: Without dead ends: 1040 [2021-11-19 13:33:58,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:33:58,886 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 832 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:58,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1822 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-19 13:33:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1038. [2021-11-19 13:33:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 810 states have (on average 1.628395061728395) internal successors, (1319), 843 states have internal predecessors, (1319), 176 states have call successors, (176), 51 states have call predecessors, (176), 51 states have return successors, (189), 169 states have call predecessors, (189), 171 states have call successors, (189) [2021-11-19 13:33:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1684 transitions. [2021-11-19 13:33:58,961 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1684 transitions. Word has length 126 [2021-11-19 13:33:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:58,962 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1684 transitions. [2021-11-19 13:33:58,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:33:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1684 transitions. [2021-11-19 13:33:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:33:58,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:58,967 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 13:33:58,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:59,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:59,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:59,381 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash 201314071, now seen corresponding path program 1 times [2021-11-19 13:33:59,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:59,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430465058] [2021-11-19 13:33:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:59,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:59,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:59,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:33:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:33:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:00,215 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 13:34:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:01,142 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 13:34:01,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:01,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430465058] [2021-11-19 13:34:01,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430465058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:01,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282529983] [2021-11-19 13:34:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:01,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:01,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:01,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:34:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:01,761 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 13:34:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:02,060 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 13:34:02,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282529983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:02,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:02,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:34:02,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779976542] [2021-11-19 13:34:02,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:02,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:02,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:02,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:02,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:02,063 INFO L87 Difference]: Start difference. First operand 1038 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:02,155 INFO L93 Difference]: Finished difference Result 3017 states and 4969 transitions. [2021-11-19 13:34:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2021-11-19 13:34:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:02,179 INFO L225 Difference]: With dead ends: 3017 [2021-11-19 13:34:02,179 INFO L226 Difference]: Without dead ends: 2024 [2021-11-19 13:34:02,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:02,188 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 831 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:02,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1791 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-19 13:34:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 2021. [2021-11-19 13:34:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 1579 states have (on average 1.6390120329322355) internal successors, (2588), 1640 states have internal predecessors, (2588), 342 states have call successors, (342), 97 states have call predecessors, (342), 99 states have return successors, (395), 335 states have call predecessors, (395), 337 states have call successors, (395) [2021-11-19 13:34:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 3325 transitions. [2021-11-19 13:34:02,303 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 3325 transitions. Word has length 127 [2021-11-19 13:34:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:02,305 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 3325 transitions. [2021-11-19 13:34:02,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 3325 transitions. [2021-11-19 13:34:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:34:02,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:02,310 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 13:34:02,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:02,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 13:34:02,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:02,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1945641891, now seen corresponding path program 1 times [2021-11-19 13:34:02,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:02,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981974629] [2021-11-19 13:34:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:02,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:02,736 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:34:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:03,520 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 13:34:03,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:04,422 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 13:34:04,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981974629] [2021-11-19 13:34:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981974629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [275284895] [2021-11-19 13:34:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:04,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:04,424 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:04,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:34:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:04,921 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 13:34:04,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:05,213 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 13:34:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [275284895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:05,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:05,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:34:05,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451567165] [2021-11-19 13:34:05,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:05,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:05,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:05,217 INFO L87 Difference]: Start difference. First operand 2021 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:05,377 INFO L93 Difference]: Finished difference Result 5968 states and 9943 transitions. [2021-11-19 13:34:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 128 [2021-11-19 13:34:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:05,422 INFO L225 Difference]: With dead ends: 5968 [2021-11-19 13:34:05,422 INFO L226 Difference]: Without dead ends: 3992 [2021-11-19 13:34:05,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:05,439 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 830 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:05,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 1794 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-11-19 13:34:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3988. [2021-11-19 13:34:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3118 states have (on average 1.6440025657472739) internal successors, (5126), 3235 states have internal predecessors, (5126), 674 states have call successors, (674), 189 states have call predecessors, (674), 195 states have return successors, (843), 667 states have call predecessors, (843), 669 states have call successors, (843) [2021-11-19 13:34:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6643 transitions. [2021-11-19 13:34:05,725 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6643 transitions. Word has length 128 [2021-11-19 13:34:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:05,725 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 6643 transitions. [2021-11-19 13:34:05,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6643 transitions. [2021-11-19 13:34:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:34:05,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:05,739 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, 1] [2021-11-19 13:34:05,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:05,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:06,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:06,156 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 185233369, now seen corresponding path program 1 times [2021-11-19 13:34:06,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:06,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967296657] [2021-11-19 13:34:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:06,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:06,158 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:06,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:34:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:06,910 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 13:34:06,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:07,822 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 13:34:07,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967296657] [2021-11-19 13:34:07,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967296657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1327542219] [2021-11-19 13:34:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:07,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:07,825 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:07,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:34:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:08,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:08,352 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 13:34:08,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:08,661 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 13:34:08,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1327542219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:08,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:08,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:34:08,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637922135] [2021-11-19 13:34:08,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:08,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:08,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:08,664 INFO L87 Difference]: Start difference. First operand 3988 states and 6643 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:09,078 INFO L93 Difference]: Finished difference Result 11871 states and 20068 transitions. [2021-11-19 13:34:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2021-11-19 13:34:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:09,169 INFO L225 Difference]: With dead ends: 11871 [2021-11-19 13:34:09,170 INFO L226 Difference]: Without dead ends: 7928 [2021-11-19 13:34:09,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:09,198 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 829 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:09,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1802 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-11-19 13:34:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7923. [2021-11-19 13:34:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7923 states, 6197 states have (on average 1.6459577214781347) internal successors, (10200), 6426 states have internal predecessors, (10200), 1338 states have call successors, (1338), 373 states have call predecessors, (1338), 387 states have return successors, (1859), 1331 states have call predecessors, (1859), 1333 states have call successors, (1859) [2021-11-19 13:34:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7923 states to 7923 states and 13397 transitions. [2021-11-19 13:34:09,688 INFO L78 Accepts]: Start accepts. Automaton has 7923 states and 13397 transitions. Word has length 129 [2021-11-19 13:34:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:09,688 INFO L470 AbstractCegarLoop]: Abstraction has 7923 states and 13397 transitions. [2021-11-19 13:34:09,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7923 states and 13397 transitions. [2021-11-19 13:34:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:34:09,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:09,694 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, 1, 1] [2021-11-19 13:34:09,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:09,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:10,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:10,098 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1447147941, now seen corresponding path program 1 times [2021-11-19 13:34:10,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:10,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217271532] [2021-11-19 13:34:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:10,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:10,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:10,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:10,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:34:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:10,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:10,821 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 13:34:10,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:11,626 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 13:34:11,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:11,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217271532] [2021-11-19 13:34:11,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217271532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:11,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030863074] [2021-11-19 13:34:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:11,627 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:11,628 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:34:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:12,133 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 13:34:12,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:12,389 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 13:34:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030863074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:12,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:12,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:34:12,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147381213] [2021-11-19 13:34:12,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:12,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:12,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:12,392 INFO L87 Difference]: Start difference. First operand 7923 states and 13397 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:13,085 INFO L93 Difference]: Finished difference Result 23678 states and 40956 transitions. [2021-11-19 13:34:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2021-11-19 13:34:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:13,267 INFO L225 Difference]: With dead ends: 23678 [2021-11-19 13:34:13,268 INFO L226 Difference]: Without dead ends: 15792 [2021-11-19 13:34:13,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:13,333 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 827 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:13,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1826 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15792 states. [2021-11-19 13:34:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15792 to 15786. [2021-11-19 13:34:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15786 states, 12349 states have (on average 1.6461251923232652) internal successors, (20328), 12802 states have internal predecessors, (20328), 2666 states have call successors, (2666), 741 states have call predecessors, (2666), 770 states have return successors, (4322), 2658 states have call predecessors, (4322), 2661 states have call successors, (4322) [2021-11-19 13:34:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15786 states to 15786 states and 27316 transitions. [2021-11-19 13:34:14,371 INFO L78 Accepts]: Start accepts. Automaton has 15786 states and 27316 transitions. Word has length 130 [2021-11-19 13:34:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 15786 states and 27316 transitions. [2021-11-19 13:34:14,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 13:34:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15786 states and 27316 transitions. [2021-11-19 13:34:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 13:34:14,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:14,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:14,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:14,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:34:14,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:14,820 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1368424932, now seen corresponding path program 1 times [2021-11-19 13:34:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:14,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551853680] [2021-11-19 13:34:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:14,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:14,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:14,823 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:14,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:34:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:15,724 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 13:34:15,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:16,588 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 13:34:16,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:16,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551853680] [2021-11-19 13:34:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551853680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:16,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:16,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 13:34:16,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282509200] [2021-11-19 13:34:16,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:16,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:34:16,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:34:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:34:16,590 INFO L87 Difference]: Start difference. First operand 15786 states and 27316 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:34:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:32,199 INFO L93 Difference]: Finished difference Result 76771 states and 150040 transitions. [2021-11-19 13:34:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 13:34:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) Word has length 194 [2021-11-19 13:34:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:33,140 INFO L225 Difference]: With dead ends: 76771 [2021-11-19 13:34:33,141 INFO L226 Difference]: Without dead ends: 61030 [2021-11-19 13:34:33,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 13:34:33,336 INFO L933 BasicCegarLoop]: 1782 mSDtfsCounter, 7268 mSDsluCounter, 5697 mSDsCounter, 0 mSdLazyCounter, 11365 mSolverCounterSat, 3008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7306 SdHoareTripleChecker+Valid, 7479 SdHoareTripleChecker+Invalid, 14373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3008 IncrementalHoareTripleChecker+Valid, 11365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:33,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7306 Valid, 7479 Invalid, 14373 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3008 Valid, 11365 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2021-11-19 13:34:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61030 states. [2021-11-19 13:34:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61030 to 53136. [2021-11-19 13:34:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53136 states, 40480 states have (on average 1.629298418972332) internal successors, (65954), 42213 states have internal predecessors, (65954), 10060 states have call successors, (10060), 2214 states have call predecessors, (10060), 2595 states have return successors, (23170), 10276 states have call predecessors, (23170), 10055 states have call successors, (23170) [2021-11-19 13:34:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53136 states to 53136 states and 99184 transitions. [2021-11-19 13:34:38,911 INFO L78 Accepts]: Start accepts. Automaton has 53136 states and 99184 transitions. Word has length 194 [2021-11-19 13:34:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 53136 states and 99184 transitions. [2021-11-19 13:34:38,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:34:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53136 states and 99184 transitions. [2021-11-19 13:34:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 13:34:39,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:39,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:39,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:39,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:39,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash -781389569, now seen corresponding path program 1 times [2021-11-19 13:34:39,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:39,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358587417] [2021-11-19 13:34:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:39,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:39,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:39,243 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:39,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:34:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:40,045 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 13:34:40,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:40,719 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 13:34:40,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:40,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358587417] [2021-11-19 13:34:40,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358587417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:40,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:40,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 13:34:40,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220043576] [2021-11-19 13:34:40,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:34:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:34:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:34:40,723 INFO L87 Difference]: Start difference. First operand 53136 states and 99184 transitions. Second operand has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 13:34:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:42,160 INFO L93 Difference]: Finished difference Result 68725 states and 126171 transitions. [2021-11-19 13:34:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:34:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 197 [2021-11-19 13:34:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:42,399 INFO L225 Difference]: With dead ends: 68725 [2021-11-19 13:34:42,400 INFO L226 Difference]: Without dead ends: 15623 [2021-11-19 13:34:42,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:42,662 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 26 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6583 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:42,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6583 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15623 states. [2021-11-19 13:34:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15623 to 15623. [2021-11-19 13:34:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15623 states, 12250 states have (on average 1.645795918367347) internal successors, (20161), 12703 states have internal predecessors, (20161), 2602 states have call successors, (2602), 741 states have call predecessors, (2602), 770 states have return successors, (4258), 2594 states have call predecessors, (4258), 2597 states have call successors, (4258) [2021-11-19 13:34:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 27021 transitions. [2021-11-19 13:34:43,521 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 27021 transitions. Word has length 197 [2021-11-19 13:34:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:43,521 INFO L470 AbstractCegarLoop]: Abstraction has 15623 states and 27021 transitions. [2021-11-19 13:34:43,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 13:34:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 27021 transitions. [2021-11-19 13:34:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-19 13:34:43,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:43,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:43,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:43,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:43,758 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1936184975, now seen corresponding path program 1 times [2021-11-19 13:34:43,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:43,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887824867] [2021-11-19 13:34:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:43,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:43,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:43,762 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:34:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:34:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:34:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:34:45,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:45,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887824867] [2021-11-19 13:34:45,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887824867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:45,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:45,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-19 13:34:45,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832964741] [2021-11-19 13:34:45,563 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:45,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:34:45,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:34:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:45,565 INFO L87 Difference]: Start difference. First operand 15623 states and 27021 transitions. Second operand has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-19 13:34:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:48,296 INFO L93 Difference]: Finished difference Result 31396 states and 55408 transitions. [2021-11-19 13:34:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) Word has length 200 [2021-11-19 13:34:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:48,387 INFO L225 Difference]: With dead ends: 31396 [2021-11-19 13:34:48,387 INFO L226 Difference]: Without dead ends: 15815 [2021-11-19 13:34:48,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:34:48,445 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1311 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:48,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 1850 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:34:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-11-19 13:34:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 15751. [2021-11-19 13:34:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15751 states, 12346 states have (on average 1.6407743398671635) internal successors, (20257), 12799 states have internal predecessors, (20257), 2602 states have call successors, (2602), 741 states have call predecessors, (2602), 802 states have return successors, (4418), 2626 states have call predecessors, (4418), 2597 states have call successors, (4418) [2021-11-19 13:34:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15751 states to 15751 states and 27277 transitions. [2021-11-19 13:34:49,336 INFO L78 Accepts]: Start accepts. Automaton has 15751 states and 27277 transitions. Word has length 200 [2021-11-19 13:34:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:49,336 INFO L470 AbstractCegarLoop]: Abstraction has 15751 states and 27277 transitions. [2021-11-19 13:34:49,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.692307692307692) internal successors, (152), 11 states have internal predecessors, (152), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-19 13:34:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15751 states and 27277 transitions. [2021-11-19 13:34:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 13:34:49,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:49,351 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:34:49,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:49,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,564 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 602511838, now seen corresponding path program 1 times [2021-11-19 13:34:49,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:49,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659076717] [2021-11-19 13:34:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:49,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:49,568 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:49,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:34:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:34:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 13:34:50,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 13:34:51,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:51,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659076717] [2021-11-19 13:34:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659076717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:51,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:51,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:34:51,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768093535] [2021-11-19 13:34:51,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:34:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:34:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:51,271 INFO L87 Difference]: Start difference. First operand 15751 states and 27277 transitions. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-19 13:34:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:57,673 INFO L93 Difference]: Finished difference Result 61951 states and 111674 transitions. [2021-11-19 13:34:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:34:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) Word has length 201 [2021-11-19 13:34:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:58,075 INFO L225 Difference]: With dead ends: 61951 [2021-11-19 13:34:58,075 INFO L226 Difference]: Without dead ends: 46242 [2021-11-19 13:34:58,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:34:58,151 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 3480 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 4752 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3609 SdHoareTripleChecker+Valid, 3106 SdHoareTripleChecker+Invalid, 5655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 4752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3609 Valid, 3106 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 4752 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 13:34:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46242 states. [2021-11-19 13:34:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46242 to 45838. [2021-11-19 13:35:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45838 states, 35844 states have (on average 1.6107856266041736) internal successors, (57737), 37192 states have internal predecessors, (57737), 7592 states have call successors, (7592), 2309 states have call predecessors, (7592), 2401 states have return successors, (15136), 7489 states have call predecessors, (15136), 7587 states have call successors, (15136) [2021-11-19 13:35:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45838 states to 45838 states and 80465 transitions. [2021-11-19 13:35:00,518 INFO L78 Accepts]: Start accepts. Automaton has 45838 states and 80465 transitions. Word has length 201 [2021-11-19 13:35:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:00,519 INFO L470 AbstractCegarLoop]: Abstraction has 45838 states and 80465 transitions. [2021-11-19 13:35:00,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-19 13:35:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 45838 states and 80465 transitions. [2021-11-19 13:35:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-19 13:35:00,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:00,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:00,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:00,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:00,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1335130824, now seen corresponding path program 1 times [2021-11-19 13:35:00,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:00,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528703073] [2021-11-19 13:35:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:00,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:00,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:00,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:00,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:35:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:35:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:35:01,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:35:02,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:02,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528703073] [2021-11-19 13:35:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528703073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:02,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:02,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-19 13:35:02,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814976695] [2021-11-19 13:35:02,142 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:02,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:02,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:02,144 INFO L87 Difference]: Start difference. First operand 45838 states and 80465 transitions. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 13:35:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:15,785 INFO L93 Difference]: Finished difference Result 166003 states and 347694 transitions. [2021-11-19 13:35:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:35:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) Word has length 203 [2021-11-19 13:35:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:17,291 INFO L225 Difference]: With dead ends: 166003 [2021-11-19 13:35:17,291 INFO L226 Difference]: Without dead ends: 120207 [2021-11-19 13:35:17,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:35:17,772 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 3914 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 6196 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3948 SdHoareTripleChecker+Valid, 4431 SdHoareTripleChecker+Invalid, 7475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 6196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:17,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3948 Valid, 4431 Invalid, 7475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 6196 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 13:35:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120207 states. [2021-11-19 13:35:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120207 to 107316. [2021-11-19 13:35:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107316 states, 80461 states have (on average 1.5900001242838144) internal successors, (127933), 84881 states have internal predecessors, (127933), 21702 states have call successors, (21702), 4613 states have call predecessors, (21702), 5152 states have return successors, (52141), 21663 states have call predecessors, (52141), 21697 states have call successors, (52141) [2021-11-19 13:35:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107316 states to 107316 states and 201776 transitions. [2021-11-19 13:35:26,592 INFO L78 Accepts]: Start accepts. Automaton has 107316 states and 201776 transitions. Word has length 203 [2021-11-19 13:35:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:26,593 INFO L470 AbstractCegarLoop]: Abstraction has 107316 states and 201776 transitions. [2021-11-19 13:35:26,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 6 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 13:35:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 107316 states and 201776 transitions. [2021-11-19 13:35:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-19 13:35:26,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:26,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:26,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:26,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:26,842 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1153397575, now seen corresponding path program 1 times [2021-11-19 13:35:26,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:26,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747076216] [2021-11-19 13:35:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:26,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:26,844 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0b6daa-8225-4977-bd47-5bc4c4c48bbc/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:35:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:35:27,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:35:28,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:28,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747076216] [2021-11-19 13:35:28,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747076216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:28,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:28,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-19 13:35:28,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347942962] [2021-11-19 13:35:28,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:28,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:35:28,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:35:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:35:28,035 INFO L87 Difference]: Start difference. First operand 107316 states and 201776 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39)