./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:28,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:28,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:28,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:28,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:28,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:28,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:28,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:28,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:28,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:28,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:28,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:28,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:28,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:28,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:28,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:28,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:28,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:28,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:28,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:28,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:28,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:28,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:28,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:28,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:28,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:28,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:28,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:28,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:28,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:28,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:28,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:28,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:28,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:28,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:28,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:28,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:28,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:28,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:28,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:28,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:28,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:50:28,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:28,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:28,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:28,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:28,974 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:28,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:28,974 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:28,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:50:28,975 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:28,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:28,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:50:28,978 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:50:28,978 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:28,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:50:28,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:50:28,979 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:50:28,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:28,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:50:28,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:50:28,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:50:28,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:28,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:28,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:28,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:28,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:28,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:50:28,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:28,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:28,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:28,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:28,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:28,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:28,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:28,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:28,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:28,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:50:28,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:50:28,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:28,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:28,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:28,997 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2021-11-19 15:50:29,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:29,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:29,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:29,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:29,366 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:29,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-19 15:50:29,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/7e6fdc801/f457a76546eb4767b999523eeef1129d/FLAGe820401ae [2021-11-19 15:50:30,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:30,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-19 15:50:30,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/7e6fdc801/f457a76546eb4767b999523eeef1129d/FLAGe820401ae [2021-11-19 15:50:30,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/7e6fdc801/f457a76546eb4767b999523eeef1129d [2021-11-19 15:50:30,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:30,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:30,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:30,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:30,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:30,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:30" (1/1) ... [2021-11-19 15:50:30,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e26e9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:30, skipping insertion in model container [2021-11-19 15:50:30,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:30" (1/1) ... [2021-11-19 15:50:30,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:30,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:30,956 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-19 15:50:30,992 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:31,013 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 15:50:31,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63920b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:31, skipping insertion in model container [2021-11-19 15:50:31,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:31,015 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:50:31,017 INFO L158 Benchmark]: Toolchain (without parser) took 687.43ms. Allocated memory is still 134.2MB. Free memory was 98.4MB in the beginning and 96.5MB in the end (delta: 1.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:50:31,018 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 88.1MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:50:31,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 684.66ms. Allocated memory is still 134.2MB. Free memory was 98.1MB in the beginning and 97.2MB in the end (delta: 851.8kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 15:50:31,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 88.1MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 684.66ms. Allocated memory is still 134.2MB. Free memory was 98.1MB in the beginning and 97.2MB in the end (delta: 851.8kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2667]: 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:33,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:33,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:33,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:33,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:33,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:33,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:33,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:33,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:33,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:33,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:33,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:33,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:33,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:33,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:33,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:33,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:33,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:33,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:33,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:33,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:33,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:33,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:33,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:33,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:33,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:33,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:33,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:33,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:33,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:33,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:33,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:33,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:33,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:33,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:33,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:33,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:33,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:33,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:33,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:33,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:33,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:50:33,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:33,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:33,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:33,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:33,628 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:33,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:33,629 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:33,629 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:33,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:33,630 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:33,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:33,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:50:33,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:50:33,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:33,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:33,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:33,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:33,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:33,632 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:50:33,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:50:33,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:50:33,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:33,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:33,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:33,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:33,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:50:33,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:33,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:33,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:33,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:33,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:33,636 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:50:33,636 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:33,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:33,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:33,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:33,637 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2021-11-19 15:50:34,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:34,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:34,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:34,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:34,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:34,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-19 15:50:34,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/35373f94a/a708d7e15e4e4b1494cd8dbc2ce97f87/FLAGa4903d39f [2021-11-19 15:50:35,009 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:35,010 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-19 15:50:35,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/35373f94a/a708d7e15e4e4b1494cd8dbc2ce97f87/FLAGa4903d39f [2021-11-19 15:50:35,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/data/35373f94a/a708d7e15e4e4b1494cd8dbc2ce97f87 [2021-11-19 15:50:35,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:35,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:35,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:35,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:35,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:35,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:35" (1/1) ... [2021-11-19 15:50:35,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7225d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:35, skipping insertion in model container [2021-11-19 15:50:35,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:35" (1/1) ... [2021-11-19 15:50:35,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:35,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:35,988 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-19 15:50:36,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:36,054 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:50:36,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:36,196 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-19 15:50:36,204 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:36,215 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:50:36,378 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_eda15233-d2ae-47e4-a8f5-bbc2453b822e/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-19 15:50:36,385 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:36,420 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:50:36,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36 WrapperNode [2021-11-19 15:50:36,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:36,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:36,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:50:36,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:50:36,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,540 INFO L137 Inliner]: procedures = 93, calls = 334, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 803 [2021-11-19 15:50:36,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:36,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:50:36,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:50:36,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:50:36,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:50:36,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:50:36,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:50:36,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:50:36,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (1/1) ... [2021-11-19 15:50:36,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:36,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:50:36,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:50:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:50:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 15:50:36,801 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 15:50:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:50:36,801 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:50:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:50:36,801 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:50:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:50:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:50:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:50:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:50:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:50:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:50:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:50:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:50:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 15:50:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 15:50:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 15:50:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 15:50:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:50:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:50:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:50:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:50:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:50:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:50:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:50:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:50:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:50:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:50:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:50:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:50:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:50:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:50:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:50:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:50:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:50:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:50:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:50:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:50:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:50:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:50:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:50:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:50:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:50:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:50:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:50:37,058 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:50:37,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:50:38,474 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:50:38,499 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:50:38,499 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:50:38,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:38 BoogieIcfgContainer [2021-11-19 15:50:38,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:50:38,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:50:38,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:50:38,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:50:38,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:50:35" (1/3) ... [2021-11-19 15:50:38,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27af2f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:38, skipping insertion in model container [2021-11-19 15:50:38,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:36" (2/3) ... [2021-11-19 15:50:38,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27af2f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:38, skipping insertion in model container [2021-11-19 15:50:38,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:38" (3/3) ... [2021-11-19 15:50:38,515 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product25.cil.c [2021-11-19 15:50:38,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:50:38,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:50:38,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:50:38,611 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 15:50:38,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:50:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 430 states have (on average 1.7116279069767442) internal successors, (736), 451 states have internal predecessors, (736), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 15:50:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 15:50:38,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:38,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:38,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1028654670, now seen corresponding path program 1 times [2021-11-19 15:50:38,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:38,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970257245] [2021-11-19 15:50:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:38,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:38,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:38,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:50:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:50:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:39,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:39,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:39,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970257245] [2021-11-19 15:50:39,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970257245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:39,637 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:39,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:50:39,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226830837] [2021-11-19 15:50:39,640 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:39,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:50:39,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:50:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:39,681 INFO L87 Difference]: Start difference. First operand has 541 states, 430 states have (on average 1.7116279069767442) internal successors, (736), 451 states have internal predecessors, (736), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 15:50:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:39,764 INFO L93 Difference]: Finished difference Result 562 states and 942 transitions. [2021-11-19 15:50:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:50:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2021-11-19 15:50:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:39,796 INFO L225 Difference]: With dead ends: 562 [2021-11-19 15:50:39,796 INFO L226 Difference]: Without dead ends: 533 [2021-11-19 15:50:39,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 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 15:50:39,805 INFO L933 BasicCegarLoop]: 903 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, 903 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 15:50:39,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-19 15:50:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2021-11-19 15:50:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 424 states have (on average 1.7099056603773586) internal successors, (725), 443 states have internal predecessors, (725), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 896 transitions. [2021-11-19 15:50:39,948 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 896 transitions. Word has length 74 [2021-11-19 15:50:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:39,950 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 896 transitions. [2021-11-19 15:50:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 15:50:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 896 transitions. [2021-11-19 15:50:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 15:50:39,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:39,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:39,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:40,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash 98754690, now seen corresponding path program 1 times [2021-11-19 15:50:40,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:40,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444922037] [2021-11-19 15:50:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:40,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:40,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:40,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:50:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:40,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:40,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:40,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444922037] [2021-11-19 15:50:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444922037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:40,958 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:40,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:40,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137944173] [2021-11-19 15:50:40,959 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:40,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:40,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:40,963 INFO L87 Difference]: Start difference. First operand 533 states and 896 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:50:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:41,139 INFO L93 Difference]: Finished difference Result 1050 states and 1770 transitions. [2021-11-19 15:50:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 76 [2021-11-19 15:50:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:41,152 INFO L225 Difference]: With dead ends: 1050 [2021-11-19 15:50:41,152 INFO L226 Difference]: Without dead ends: 533 [2021-11-19 15:50:41,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 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 15:50:41,164 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 15 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:41,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2645 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-19 15:50:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2021-11-19 15:50:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 424 states have (on average 1.695754716981132) internal successors, (719), 443 states have internal predecessors, (719), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 890 transitions. [2021-11-19 15:50:41,233 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 890 transitions. Word has length 76 [2021-11-19 15:50:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:41,234 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 890 transitions. [2021-11-19 15:50:41,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:50:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 890 transitions. [2021-11-19 15:50:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:50:41,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:41,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:41,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:41,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:41,466 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1519998316, now seen corresponding path program 1 times [2021-11-19 15:50:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:41,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962959749] [2021-11-19 15:50:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:41,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:41,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:41,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:41,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:50:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:41,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:42,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:42,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:42,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962959749] [2021-11-19 15:50:42,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962959749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:42,397 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:42,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:50:42,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134630277] [2021-11-19 15:50:42,398 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:50:42,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:50:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:50:42,400 INFO L87 Difference]: Start difference. First operand 533 states and 890 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:50:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:42,580 INFO L93 Difference]: Finished difference Result 1008 states and 1687 transitions. [2021-11-19 15:50:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 81 [2021-11-19 15:50:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:42,593 INFO L225 Difference]: With dead ends: 1008 [2021-11-19 15:50:42,594 INFO L226 Difference]: Without dead ends: 527 [2021-11-19 15:50:42,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 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 15:50:42,602 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 194 mSDsluCounter, 4292 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 5169 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:42,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 5169 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-19 15:50:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-11-19 15:50:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 418 states have (on average 1.6889952153110048) internal successors, (706), 437 states have internal predecessors, (706), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 877 transitions. [2021-11-19 15:50:42,654 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 877 transitions. Word has length 81 [2021-11-19 15:50:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:42,655 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 877 transitions. [2021-11-19 15:50:42,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:50:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 877 transitions. [2021-11-19 15:50:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:50:42,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:42,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:42,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:42,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -818104587, now seen corresponding path program 1 times [2021-11-19 15:50:42,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:42,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844649836] [2021-11-19 15:50:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:42,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:42,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:42,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:50:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:43,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:43,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:43,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844649836] [2021-11-19 15:50:43,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844649836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:43,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:43,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:43,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101205368] [2021-11-19 15:50:43,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:43,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:43,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:43,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:43,653 INFO L87 Difference]: Start difference. First operand 527 states and 877 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:50:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:43,837 INFO L93 Difference]: Finished difference Result 1011 states and 1688 transitions. [2021-11-19 15:50:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-19 15:50:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:43,844 INFO L225 Difference]: With dead ends: 1011 [2021-11-19 15:50:43,844 INFO L226 Difference]: Without dead ends: 527 [2021-11-19 15:50:43,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 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 15:50:43,849 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 121 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:43,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3275 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-19 15:50:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-11-19 15:50:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 418 states have (on average 1.631578947368421) internal successors, (682), 437 states have internal predecessors, (682), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 853 transitions. [2021-11-19 15:50:43,877 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 853 transitions. Word has length 82 [2021-11-19 15:50:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:43,878 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 853 transitions. [2021-11-19 15:50:43,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:50:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 853 transitions. [2021-11-19 15:50:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:50:43,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:43,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:43,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:44,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:44,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 710984890, now seen corresponding path program 1 times [2021-11-19 15:50:44,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:44,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593390033] [2021-11-19 15:50:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:44,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:44,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:44,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:50:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:44,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:45,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:45,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593390033] [2021-11-19 15:50:45,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593390033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:45,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:45,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:50:45,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314147213] [2021-11-19 15:50:45,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:45,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:45,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:45,017 INFO L87 Difference]: Start difference. First operand 527 states and 853 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:50:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:45,172 INFO L93 Difference]: Finished difference Result 1002 states and 1650 transitions. [2021-11-19 15:50:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:45,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2021-11-19 15:50:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:45,180 INFO L225 Difference]: With dead ends: 1002 [2021-11-19 15:50:45,180 INFO L226 Difference]: Without dead ends: 506 [2021-11-19 15:50:45,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 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 15:50:45,186 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 117 mSDsluCounter, 4142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4983 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:45,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4983 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-19 15:50:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-11-19 15:50:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 397 states have (on average 1.654911838790932) internal successors, (657), 416 states have internal predecessors, (657), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 828 transitions. [2021-11-19 15:50:45,219 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 828 transitions. Word has length 84 [2021-11-19 15:50:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:45,219 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 828 transitions. [2021-11-19 15:50:45,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:50:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 828 transitions. [2021-11-19 15:50:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 15:50:45,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:45,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:45,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:45,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:45,447 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -787902239, now seen corresponding path program 1 times [2021-11-19 15:50:45,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:45,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501716064] [2021-11-19 15:50:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:45,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:45,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:45,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:50:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:45,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:46,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501716064] [2021-11-19 15:50:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501716064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:46,430 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:50:46,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628971190] [2021-11-19 15:50:46,430 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:50:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:50:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:50:46,432 INFO L87 Difference]: Start difference. First operand 506 states and 828 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:50:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:46,630 INFO L93 Difference]: Finished difference Result 975 states and 1614 transitions. [2021-11-19 15:50:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:46,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-19 15:50:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:46,639 INFO L225 Difference]: With dead ends: 975 [2021-11-19 15:50:46,639 INFO L226 Difference]: Without dead ends: 506 [2021-11-19 15:50:46,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 161 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 15:50:46,647 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 59 mSDsluCounter, 5671 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6484 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:46,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 6484 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-19 15:50:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-11-19 15:50:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 397 states have (on average 1.6523929471032746) internal successors, (656), 416 states have internal predecessors, (656), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 15:50:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 827 transitions. [2021-11-19 15:50:46,673 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 827 transitions. Word has length 87 [2021-11-19 15:50:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:46,679 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 827 transitions. [2021-11-19 15:50:46,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:50:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 827 transitions. [2021-11-19 15:50:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:50:46,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:46,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:46,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 15:50:46,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:46,900 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash 664891284, now seen corresponding path program 1 times [2021-11-19 15:50:46,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:46,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093868949] [2021-11-19 15:50:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:46,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:46,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:46,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:50:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:50:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:47,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:48,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:48,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093868949] [2021-11-19 15:50:48,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093868949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:48,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:48,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 15:50:48,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197998841] [2021-11-19 15:50:48,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:48,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:50:48,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:48,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:50:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:50:48,345 INFO L87 Difference]: Start difference. First operand 506 states and 827 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 15:50:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:52,391 INFO L93 Difference]: Finished difference Result 1104 states and 1857 transitions. [2021-11-19 15:50:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2021-11-19 15:50:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:52,401 INFO L225 Difference]: With dead ends: 1104 [2021-11-19 15:50:52,401 INFO L226 Difference]: Without dead ends: 643 [2021-11-19 15:50:52,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:50:52,406 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 1410 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 4338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:52,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 3111 Invalid, 4338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 15:50:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-19 15:50:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 510. [2021-11-19 15:50:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 400 states have (on average 1.6475) internal successors, (659), 419 states have internal predecessors, (659), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (99), 82 states have call predecessors, (99), 83 states have call successors, (99) [2021-11-19 15:50:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 846 transitions. [2021-11-19 15:50:52,451 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 846 transitions. Word has length 88 [2021-11-19 15:50:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:52,452 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 846 transitions. [2021-11-19 15:50:52,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 15:50:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 846 transitions. [2021-11-19 15:50:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:50:52,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:52,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:52,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:52,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:52,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash 902413727, now seen corresponding path program 1 times [2021-11-19 15:50:52,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:52,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037498470] [2021-11-19 15:50:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:52,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:52,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:52,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:50:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:50:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:53,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:53,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:53,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037498470] [2021-11-19 15:50:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037498470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:53,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:53,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:50:53,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798963791] [2021-11-19 15:50:53,714 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:53,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:50:53,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:53,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:50:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:53,716 INFO L87 Difference]: Start difference. First operand 510 states and 846 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 15:50:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:59,213 INFO L93 Difference]: Finished difference Result 1862 states and 3200 transitions. [2021-11-19 15:50:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:50:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2021-11-19 15:50:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:59,235 INFO L225 Difference]: With dead ends: 1862 [2021-11-19 15:50:59,236 INFO L226 Difference]: Without dead ends: 1397 [2021-11-19 15:50:59,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:59,242 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 4684 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 1320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 5577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1320 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:59,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4759 Valid, 3261 Invalid, 5577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1320 Valid, 4257 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 15:50:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-11-19 15:50:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1309. [2021-11-19 15:50:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1024 states have (on average 1.662109375) internal successors, (1702), 1072 states have internal predecessors, (1702), 229 states have call successors, (229), 54 states have call predecessors, (229), 55 states have return successors, (247), 219 states have call predecessors, (247), 224 states have call successors, (247) [2021-11-19 15:50:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2178 transitions. [2021-11-19 15:50:59,381 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2178 transitions. Word has length 89 [2021-11-19 15:50:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 2178 transitions. [2021-11-19 15:50:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 15:50:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2178 transitions. [2021-11-19 15:50:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 15:50:59,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:59,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:50:59,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:59,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:59,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1594726657, now seen corresponding path program 1 times [2021-11-19 15:50:59,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:59,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516442905] [2021-11-19 15:50:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:59,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:59,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:50:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:00,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:00,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:00,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516442905] [2021-11-19 15:51:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516442905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:00,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:00,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 15:51:00,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187441442] [2021-11-19 15:51:00,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:51:00,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:51:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:51:00,736 INFO L87 Difference]: Start difference. First operand 1309 states and 2178 transitions. Second operand has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 15:51:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:10,032 INFO L93 Difference]: Finished difference Result 6695 states and 11638 transitions. [2021-11-19 15:51:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:51:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 91 [2021-11-19 15:51:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:10,149 INFO L225 Difference]: With dead ends: 6695 [2021-11-19 15:51:10,149 INFO L226 Difference]: Without dead ends: 5431 [2021-11-19 15:51:10,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:51:10,174 INFO L933 BasicCegarLoop]: 2022 mSDtfsCounter, 4023 mSDsluCounter, 3952 mSDsCounter, 0 mSdLazyCounter, 7551 mSolverCounterSat, 1882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 5974 SdHoareTripleChecker+Invalid, 9433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1882 IncrementalHoareTripleChecker+Valid, 7551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:10,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4120 Valid, 5974 Invalid, 9433 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1882 Valid, 7551 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-19 15:51:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-11-19 15:51:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 3112. [2021-11-19 15:51:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 2321 states have (on average 1.6484274019819043) internal successors, (3826), 2467 states have internal predecessors, (3826), 674 states have call successors, (674), 103 states have call predecessors, (674), 116 states have return successors, (769), 663 states have call predecessors, (769), 669 states have call successors, (769) [2021-11-19 15:51:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 5269 transitions. [2021-11-19 15:51:10,563 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 5269 transitions. Word has length 91 [2021-11-19 15:51:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:10,565 INFO L470 AbstractCegarLoop]: Abstraction has 3112 states and 5269 transitions. [2021-11-19 15:51:10,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 15:51:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 5269 transitions. [2021-11-19 15:51:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 15:51:10,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:10,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:51:10,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:10,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 854873473, now seen corresponding path program 1 times [2021-11-19 15:51:10,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:10,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222556553] [2021-11-19 15:51:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:10,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:10,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:10,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:51:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:51:11,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:11,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:11,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:11,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222556553] [2021-11-19 15:51:11,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222556553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:11,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:51:11,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830764290] [2021-11-19 15:51:11,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:51:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:51:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:51:11,772 INFO L87 Difference]: Start difference. First operand 3112 states and 5269 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 15:51:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:16,176 INFO L93 Difference]: Finished difference Result 8366 states and 14305 transitions. [2021-11-19 15:51:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:51:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 91 [2021-11-19 15:51:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:16,248 INFO L225 Difference]: With dead ends: 8366 [2021-11-19 15:51:16,249 INFO L226 Difference]: Without dead ends: 6134 [2021-11-19 15:51:16,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:51:16,275 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 2905 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2978 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:16,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2978 Valid, 2444 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 15:51:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-11-19 15:51:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 5743. [2021-11-19 15:51:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5743 states, 4304 states have (on average 1.6484665427509293) internal successors, (7095), 4577 states have internal predecessors, (7095), 1202 states have call successors, (1202), 187 states have call predecessors, (1202), 236 states have return successors, (1476), 1182 states have call predecessors, (1476), 1197 states have call successors, (1476) [2021-11-19 15:51:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5743 states to 5743 states and 9773 transitions. [2021-11-19 15:51:16,935 INFO L78 Accepts]: Start accepts. Automaton has 5743 states and 9773 transitions. Word has length 91 [2021-11-19 15:51:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:16,936 INFO L470 AbstractCegarLoop]: Abstraction has 5743 states and 9773 transitions. [2021-11-19 15:51:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 15:51:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5743 states and 9773 transitions. [2021-11-19 15:51:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 15:51:16,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:16,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:51:16,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:17,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:17,161 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1624470043, now seen corresponding path program 1 times [2021-11-19 15:51:17,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:17,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476140150] [2021-11-19 15:51:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:17,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:17,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:17,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:17,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:51:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:51:17,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:17,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:18,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:18,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476140150] [2021-11-19 15:51:18,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476140150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:18,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:18,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 15:51:18,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6936873] [2021-11-19 15:51:18,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:51:18,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:51:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:51:18,792 INFO L87 Difference]: Start difference. First operand 5743 states and 9773 transitions. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 15:51:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:26,525 INFO L93 Difference]: Finished difference Result 15502 states and 26463 transitions. [2021-11-19 15:51:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:51:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 96 [2021-11-19 15:51:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:26,623 INFO L225 Difference]: With dead ends: 15502 [2021-11-19 15:51:26,624 INFO L226 Difference]: Without dead ends: 10539 [2021-11-19 15:51:26,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:51:26,668 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 3186 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 6936 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3260 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 7745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 6936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:26,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3260 Valid, 3625 Invalid, 7745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 6936 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-19 15:51:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10539 states. [2021-11-19 15:51:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10539 to 10245. [2021-11-19 15:51:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 7652 states have (on average 1.638395190799791) internal successors, (12537), 8133 states have internal predecessors, (12537), 2158 states have call successors, (2158), 345 states have call predecessors, (2158), 434 states have return successors, (2666), 2126 states have call predecessors, (2666), 2153 states have call successors, (2666) [2021-11-19 15:51:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 17361 transitions. [2021-11-19 15:51:27,725 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 17361 transitions. Word has length 96 [2021-11-19 15:51:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:27,726 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 17361 transitions. [2021-11-19 15:51:27,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 15:51:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 17361 transitions. [2021-11-19 15:51:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 15:51:27,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:27,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:51:27,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:27,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:27,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1127220475, now seen corresponding path program 1 times [2021-11-19 15:51:27,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:27,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463545243] [2021-11-19 15:51:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:27,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:27,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:51:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:51:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:28,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:51:28,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:28,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463545243] [2021-11-19 15:51:28,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463545243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:28,830 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:28,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:51:28,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388132312] [2021-11-19 15:51:28,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:28,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:51:28,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:51:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:51:28,833 INFO L87 Difference]: Start difference. First operand 10245 states and 17361 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:51:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:29,578 INFO L93 Difference]: Finished difference Result 20242 states and 34551 transitions. [2021-11-19 15:51:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:51:29,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-19 15:51:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:29,694 INFO L225 Difference]: With dead ends: 20242 [2021-11-19 15:51:29,695 INFO L226 Difference]: Without dead ends: 10245 [2021-11-19 15:51:29,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:51:29,739 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 234 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3787 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:51:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2021-11-19 15:51:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10245. [2021-11-19 15:51:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 7652 states have (on average 1.6221902770517511) internal successors, (12413), 8133 states have internal predecessors, (12413), 2158 states have call successors, (2158), 345 states have call predecessors, (2158), 434 states have return successors, (2666), 2126 states have call predecessors, (2666), 2153 states have call successors, (2666) [2021-11-19 15:51:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 17237 transitions. [2021-11-19 15:51:30,834 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 17237 transitions. Word has length 103 [2021-11-19 15:51:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:30,835 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 17237 transitions. [2021-11-19 15:51:30,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:51:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 17237 transitions. [2021-11-19 15:51:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 15:51:30,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:30,842 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:51:30,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:31,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:31,054 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1165001206, now seen corresponding path program 1 times [2021-11-19 15:51:31,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:31,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114651503] [2021-11-19 15:51:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:31,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:31,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:31,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:51:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:31,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:51:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:51:31,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:51:32,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:32,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114651503] [2021-11-19 15:51:32,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114651503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:32,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:32,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 15:51:32,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099306735] [2021-11-19 15:51:32,233 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:32,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:51:32,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:51:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:51:32,236 INFO L87 Difference]: Start difference. First operand 10245 states and 17237 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:51:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:36,480 INFO L93 Difference]: Finished difference Result 20372 states and 34327 transitions. [2021-11-19 15:51:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:51:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 108 [2021-11-19 15:51:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:36,554 INFO L225 Difference]: With dead ends: 20372 [2021-11-19 15:51:36,554 INFO L226 Difference]: Without dead ends: 11120 [2021-11-19 15:51:36,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:51:36,593 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 2072 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 3404 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 3404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:36,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 2469 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 3404 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 15:51:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11120 states. [2021-11-19 15:51:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11120 to 10605. [2021-11-19 15:51:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10605 states, 7924 states have (on average 1.6124432104997477) internal successors, (12777), 8425 states have internal predecessors, (12777), 2196 states have call successors, (2196), 377 states have call predecessors, (2196), 484 states have return successors, (2752), 2162 states have call predecessors, (2752), 2191 states have call successors, (2752) [2021-11-19 15:51:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 17725 transitions. [2021-11-19 15:51:37,592 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 17725 transitions. Word has length 108 [2021-11-19 15:51:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:37,593 INFO L470 AbstractCegarLoop]: Abstraction has 10605 states and 17725 transitions. [2021-11-19 15:51:37,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:51:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 17725 transitions. [2021-11-19 15:51:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:51:37,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:37,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:37,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:37,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:37,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1858569525, now seen corresponding path program 1 times [2021-11-19 15:51:37,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:37,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082941886] [2021-11-19 15:51:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:37,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:37,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:37,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:51:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:51:38,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:51:38,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:51:39,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:39,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082941886] [2021-11-19 15:51:39,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082941886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:39,476 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:39,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:51:39,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772566534] [2021-11-19 15:51:39,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:39,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:51:39,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:51:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:51:39,478 INFO L87 Difference]: Start difference. First operand 10605 states and 17725 transitions. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 15:51:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:46,703 INFO L93 Difference]: Finished difference Result 28445 states and 47941 transitions. [2021-11-19 15:51:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:51:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-11-19 15:51:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:46,832 INFO L225 Difference]: With dead ends: 28445 [2021-11-19 15:51:46,832 INFO L226 Difference]: Without dead ends: 18830 [2021-11-19 15:51:46,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:51:46,874 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 2779 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 5717 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2850 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 6425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:46,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2850 Valid, 3289 Invalid, 6425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5717 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 15:51:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-11-19 15:51:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 18756. [2021-11-19 15:51:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18756 states, 13991 states have (on average 1.6217568436852263) internal successors, (22690), 14845 states have internal predecessors, (22690), 3970 states have call successors, (3970), 681 states have call predecessors, (3970), 794 states have return successors, (4827), 3909 states have call predecessors, (4827), 3965 states have call successors, (4827) [2021-11-19 15:51:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18756 states to 18756 states and 31487 transitions. [2021-11-19 15:51:48,483 INFO L78 Accepts]: Start accepts. Automaton has 18756 states and 31487 transitions. Word has length 113 [2021-11-19 15:51:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:48,483 INFO L470 AbstractCegarLoop]: Abstraction has 18756 states and 31487 transitions. [2021-11-19 15:51:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 15:51:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 18756 states and 31487 transitions. [2021-11-19 15:51:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:51:48,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:48,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:48,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:48,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:48,706 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1992583031, now seen corresponding path program 1 times [2021-11-19 15:51:48,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:48,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270506384] [2021-11-19 15:51:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:48,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:48,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:48,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:48,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:51:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:51:49,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:51:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:51:50,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:50,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270506384] [2021-11-19 15:51:50,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270506384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:50,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:50,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:51:50,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100400720] [2021-11-19 15:51:50,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:50,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:51:50,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:51:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:51:50,120 INFO L87 Difference]: Start difference. First operand 18756 states and 31487 transitions. Second operand has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 15:51:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:56,713 INFO L93 Difference]: Finished difference Result 47771 states and 81052 transitions. [2021-11-19 15:51:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:51:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) Word has length 113 [2021-11-19 15:51:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:56,925 INFO L225 Difference]: With dead ends: 47771 [2021-11-19 15:51:56,925 INFO L226 Difference]: Without dead ends: 28466 [2021-11-19 15:51:57,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:51:57,153 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 3334 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3065 SdHoareTripleChecker+Invalid, 5666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:57,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3428 Valid, 3065 Invalid, 5666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 15:51:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28466 states. [2021-11-19 15:51:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28466 to 27174. [2021-11-19 15:51:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27174 states, 20201 states have (on average 1.616949655957626) internal successors, (32664), 21528 states have internal predecessors, (32664), 5826 states have call successors, (5826), 1014 states have call predecessors, (5826), 1146 states have return successors, (7143), 5631 states have call predecessors, (7143), 5821 states have call successors, (7143) [2021-11-19 15:51:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27174 states to 27174 states and 45633 transitions. [2021-11-19 15:51:59,160 INFO L78 Accepts]: Start accepts. Automaton has 27174 states and 45633 transitions. Word has length 113 [2021-11-19 15:51:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:59,161 INFO L470 AbstractCegarLoop]: Abstraction has 27174 states and 45633 transitions. [2021-11-19 15:51:59,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 15:51:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27174 states and 45633 transitions. [2021-11-19 15:51:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 15:51:59,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:59,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:59,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 15:51:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:59,385 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash -150427220, now seen corresponding path program 1 times [2021-11-19 15:51:59,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:59,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067860394] [2021-11-19 15:51:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:59,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:59,387 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:59,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:51:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:51:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:52:00,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:52:00,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:00,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067860394] [2021-11-19 15:52:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067860394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:00,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:52:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-19 15:52:00,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695129707] [2021-11-19 15:52:00,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:52:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:52:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:52:00,376 INFO L87 Difference]: Start difference. First operand 27174 states and 45633 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 15:52:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:02,862 INFO L93 Difference]: Finished difference Result 27483 states and 46193 transitions. [2021-11-19 15:52:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:52:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2021-11-19 15:52:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:03,024 INFO L225 Difference]: With dead ends: 27483 [2021-11-19 15:52:03,025 INFO L226 Difference]: Without dead ends: 27468 [2021-11-19 15:52:03,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:52:03,043 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 1674 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:03,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 2124 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:52:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-11-19 15:52:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 27279. [2021-11-19 15:52:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27279 states, 20289 states have (on average 1.6155059391788653) internal successors, (32777), 21612 states have internal predecessors, (32777), 5843 states have call successors, (5843), 1014 states have call predecessors, (5843), 1146 states have return successors, (7174), 5652 states have call predecessors, (7174), 5838 states have call successors, (7174) [2021-11-19 15:52:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27279 states to 27279 states and 45794 transitions. [2021-11-19 15:52:05,068 INFO L78 Accepts]: Start accepts. Automaton has 27279 states and 45794 transitions. Word has length 114 [2021-11-19 15:52:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:05,069 INFO L470 AbstractCegarLoop]: Abstraction has 27279 states and 45794 transitions. [2021-11-19 15:52:05,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 15:52:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27279 states and 45794 transitions. [2021-11-19 15:52:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:52:05,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:05,076 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:52:05,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 15:52:05,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:05,296 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2049288697, now seen corresponding path program 1 times [2021-11-19 15:52:05,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:05,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530138269] [2021-11-19 15:52:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:05,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:05,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:05,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:52:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:52:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:52:05,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:52:06,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:06,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530138269] [2021-11-19 15:52:06,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530138269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:06,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:52:06,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:52:06,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848953054] [2021-11-19 15:52:06,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:52:06,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:52:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:52:06,065 INFO L87 Difference]: Start difference. First operand 27279 states and 45794 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:52:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:07,831 INFO L93 Difference]: Finished difference Result 27294 states and 45812 transitions. [2021-11-19 15:52:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:52:07,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2021-11-19 15:52:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:08,008 INFO L225 Difference]: With dead ends: 27294 [2021-11-19 15:52:08,009 INFO L226 Difference]: Without dead ends: 27279 [2021-11-19 15:52:08,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:52:08,035 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 74 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 4045 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:08,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 4045 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:52:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27279 states. [2021-11-19 15:52:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27279 to 27279. [2021-11-19 15:52:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27279 states, 20289 states have (on average 1.6137808664793731) internal successors, (32742), 21612 states have internal predecessors, (32742), 5843 states have call successors, (5843), 1014 states have call predecessors, (5843), 1146 states have return successors, (7174), 5652 states have call predecessors, (7174), 5838 states have call successors, (7174) [2021-11-19 15:52:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27279 states to 27279 states and 45759 transitions. [2021-11-19 15:52:10,358 INFO L78 Accepts]: Start accepts. Automaton has 27279 states and 45759 transitions. Word has length 120 [2021-11-19 15:52:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:10,359 INFO L470 AbstractCegarLoop]: Abstraction has 27279 states and 45759 transitions. [2021-11-19 15:52:10,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:52:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27279 states and 45759 transitions. [2021-11-19 15:52:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:52:10,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:10,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-19 15:52:10,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 15:52:10,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:10,604 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1321817241, now seen corresponding path program 1 times [2021-11-19 15:52:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163416978] [2021-11-19 15:52:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:10,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:10,606 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:10,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:52:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:11,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:52:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:52:11,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:52:12,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:12,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163416978] [2021-11-19 15:52:12,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163416978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:12,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:52:12,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:52:12,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912354754] [2021-11-19 15:52:12,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:52:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:52:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:52:12,339 INFO L87 Difference]: Start difference. First operand 27279 states and 45759 transitions. Second operand has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:52:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:17,517 INFO L93 Difference]: Finished difference Result 54521 states and 91561 transitions. [2021-11-19 15:52:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:52:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) Word has length 131 [2021-11-19 15:52:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:17,743 INFO L225 Difference]: With dead ends: 54521 [2021-11-19 15:52:17,743 INFO L226 Difference]: Without dead ends: 27355 [2021-11-19 15:52:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:52:17,858 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1233 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 3280 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 3280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:17,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 2533 Invalid, 3612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 3280 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 15:52:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-11-19 15:52:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 27279. [2021-11-19 15:52:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27279 states, 20289 states have (on average 1.6120557937798807) internal successors, (32707), 21612 states have internal predecessors, (32707), 5843 states have call successors, (5843), 1014 states have call predecessors, (5843), 1146 states have return successors, (7174), 5652 states have call predecessors, (7174), 5838 states have call successors, (7174) [2021-11-19 15:52:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27279 states to 27279 states and 45724 transitions. [2021-11-19 15:52:20,358 INFO L78 Accepts]: Start accepts. Automaton has 27279 states and 45724 transitions. Word has length 131 [2021-11-19 15:52:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:20,358 INFO L470 AbstractCegarLoop]: Abstraction has 27279 states and 45724 transitions. [2021-11-19 15:52:20,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:52:20,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27279 states and 45724 transitions. [2021-11-19 15:52:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 15:52:20,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:20,364 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-19 15:52:20,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:20,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1900924434, now seen corresponding path program 1 times [2021-11-19 15:52:20,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:20,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510838910] [2021-11-19 15:52:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:20,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:20,587 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:52:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:52:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:52:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:52:21,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:21,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510838910] [2021-11-19 15:52:21,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510838910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:21,493 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:52:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:52:21,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101881181] [2021-11-19 15:52:21,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:21,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:52:21,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:52:21,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:52:21,495 INFO L87 Difference]: Start difference. First operand 27279 states and 45724 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 15:52:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:23,072 INFO L93 Difference]: Finished difference Result 27654 states and 46357 transitions. [2021-11-19 15:52:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:52:23,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-11-19 15:52:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:23,246 INFO L225 Difference]: With dead ends: 27654 [2021-11-19 15:52:23,246 INFO L226 Difference]: Without dead ends: 27639 [2021-11-19 15:52:23,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:52:23,263 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 77 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 3359 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:23,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 3359 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:52:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27639 states. [2021-11-19 15:52:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27639 to 27333. [2021-11-19 15:52:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27333 states, 20343 states have (on average 1.609595438234282) internal successors, (32744), 21666 states have internal predecessors, (32744), 5843 states have call successors, (5843), 1014 states have call predecessors, (5843), 1146 states have return successors, (7174), 5652 states have call predecessors, (7174), 5838 states have call successors, (7174) [2021-11-19 15:52:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27333 states to 27333 states and 45761 transitions. [2021-11-19 15:52:25,351 INFO L78 Accepts]: Start accepts. Automaton has 27333 states and 45761 transitions. Word has length 140 [2021-11-19 15:52:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:25,352 INFO L470 AbstractCegarLoop]: Abstraction has 27333 states and 45761 transitions. [2021-11-19 15:52:25,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 15:52:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 27333 states and 45761 transitions. [2021-11-19 15:52:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 15:52:25,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:25,361 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:25,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:25,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,564 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1346100652, now seen corresponding path program 1 times [2021-11-19 15:52:25,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:25,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793904673] [2021-11-19 15:52:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:25,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:25,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:25,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:52:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:52:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:52:26,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 15:52:27,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:27,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793904673] [2021-11-19 15:52:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793904673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:27,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1363903352] [2021-11-19 15:52:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:27,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:27,076 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:27,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eda15233-d2ae-47e4-a8f5-bbc2453b822e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:52:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:52:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:52:27,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:52:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1363903352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:28,460 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:52:28,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 8] total 18 [2021-11-19 15:52:28,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439847703] [2021-11-19 15:52:28,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:52:28,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:52:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:52:28,464 INFO L87 Difference]: Start difference. First operand 27333 states and 45761 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 15:52:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:35,651 INFO L93 Difference]: Finished difference Result 93254 states and 160595 transitions. [2021-11-19 15:52:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:52:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 168 [2021-11-19 15:52:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:36,424 INFO L225 Difference]: With dead ends: 93254 [2021-11-19 15:52:36,424 INFO L226 Difference]: Without dead ends: 66009 [2021-11-19 15:52:36,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:52:36,581 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2341 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2413 Valid, 1422 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 15:52:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66009 states.