./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.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_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/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_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/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_31de18f6-0962-4d2f-aff7-dea25421d105/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:36:08,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:36:08,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:36:08,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:36:08,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:36:08,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:36:08,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:36:08,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:36:08,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:36:08,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:36:08,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:36:08,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:36:08,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:36:08,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:36:08,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:36:08,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:36:08,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:36:08,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:36:08,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:36:08,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:36:08,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:36:08,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:36:08,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:36:08,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:36:08,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:36:08,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:36:08,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:36:08,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:36:08,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:36:08,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:36:08,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:36:08,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:36:08,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:36:08,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:36:08,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:36:08,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:36:08,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:36:08,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:36:08,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:36:08,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:36:08,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:36:08,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:36:08,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:36:08,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:36:08,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:36:08,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:36:08,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:36:08,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:36:08,949 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:36:08,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:36:08,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:36:08,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:36:08,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:36:08,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:36:08,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:36:08,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:36:08,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:36:08,951 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:36:08,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:36:08,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:36:08,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:36:08,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:36:08,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:36:08,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:36:08,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:36:08,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:36:08,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:36:08,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:36:08,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:36:08,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:36:08,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:36:08,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:36:08,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:36:08,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:36:08,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:36:08,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:36:08,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:36:08,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:36:08,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:36:08,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:36:08,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:36:08,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:36:08,958 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_31de18f6-0962-4d2f-aff7-dea25421d105/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-19 13:36:09,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:36:09,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:36:09,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:36:09,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:36:09,249 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:36:09,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-19 13:36:09,316 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/fc5068aa9/d6a2cdcd53e14cbbac07129e7f70cb93/FLAGc8944d73a [2021-11-19 13:36:09,946 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:36:09,947 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-19 13:36:09,989 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/fc5068aa9/d6a2cdcd53e14cbbac07129e7f70cb93/FLAGc8944d73a [2021-11-19 13:36:10,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/fc5068aa9/d6a2cdcd53e14cbbac07129e7f70cb93 [2021-11-19 13:36:10,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:36:10,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:36:10,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:36:10,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:36:10,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:36:10,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:36:10" (1/1) ... [2021-11-19 13:36:10,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e9061d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:10, skipping insertion in model container [2021-11-19 13:36:10,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:36:10" (1/1) ... [2021-11-19 13:36:10,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:36:10,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:36:10,464 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_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-19 13:36:10,833 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:10,844 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:36:10,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53ab9426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:10, skipping insertion in model container [2021-11-19 13:36:10,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:36:10,846 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:36:10,848 INFO L158 Benchmark]: Toolchain (without parser) took 688.18ms. Allocated memory was 86.0MB in the beginning and 111.1MB in the end (delta: 25.2MB). Free memory was 45.4MB in the beginning and 73.4MB in the end (delta: -28.0MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-11-19 13:36:10,849 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory is still 64.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:36:10,850 INFO L158 Benchmark]: CACSL2BoogieTranslator took 683.23ms. Allocated memory was 86.0MB in the beginning and 111.1MB in the end (delta: 25.2MB). Free memory was 45.2MB in the beginning and 73.4MB in the end (delta: -28.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-11-19 13:36:10,852 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory is still 64.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 683.23ms. Allocated memory was 86.0MB in the beginning and 111.1MB in the end (delta: 25.2MB). Free memory was 45.2MB in the beginning and 73.4MB in the end (delta: -28.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 759]: 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_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/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_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/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_31de18f6-0962-4d2f-aff7-dea25421d105/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:36:13,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:36:13,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:36:13,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:36:13,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:36:13,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:36:13,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:36:13,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:36:13,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:36:13,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:36:13,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:36:13,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:36:13,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:36:13,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:36:13,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:36:13,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:36:13,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:36:13,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:36:13,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:36:13,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:36:13,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:36:13,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:36:13,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:36:13,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:36:13,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:36:13,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:36:13,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:36:13,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:36:13,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:36:13,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:36:13,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:36:13,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:36:13,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:36:13,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:36:13,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:36:13,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:36:13,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:36:13,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:36:13,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:36:13,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:36:13,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:36:13,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:36:13,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:36:13,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:36:13,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:36:13,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:36:13,267 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:36:13,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:36:13,267 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:36:13,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:36:13,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:36:13,268 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:36:13,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:36:13,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:36:13,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:36:13,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:36:13,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:36:13,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:36:13,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:36:13,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:36:13,272 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:36:13,273 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:36:13,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:36:13,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:36:13,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:36:13,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:36:13,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:36:13,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:36:13,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:36:13,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:36:13,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:36:13,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:36:13,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:36:13,275 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:36:13,276 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:13,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:36:13,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:36:13,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:36:13,277 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_31de18f6-0962-4d2f-aff7-dea25421d105/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-19 13:36:13,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:36:13,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:36:13,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:36:13,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:36:13,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:36:13,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-19 13:36:13,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/909f9e2ca/82a4f5b10de04ce99663205992914024/FLAG6100ecbbd [2021-11-19 13:36:14,658 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:36:14,670 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-19 13:36:14,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/909f9e2ca/82a4f5b10de04ce99663205992914024/FLAG6100ecbbd [2021-11-19 13:36:14,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/data/909f9e2ca/82a4f5b10de04ce99663205992914024 [2021-11-19 13:36:14,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:36:14,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:36:14,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:36:14,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:36:14,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:36:14,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:36:14" (1/1) ... [2021-11-19 13:36:14,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35da5321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:14, skipping insertion in model container [2021-11-19 13:36:14,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:36:14" (1/1) ... [2021-11-19 13:36:14,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:36:14,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:36:14,970 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_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-19 13:36:15,355 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:15,376 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:36:15,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:36:15,405 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_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-19 13:36:15,577 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:15,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:36:15,594 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_31de18f6-0962-4d2f-aff7-dea25421d105/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-19 13:36:15,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:36:15,725 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:36:15,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15 WrapperNode [2021-11-19 13:36:15,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:36:15,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:36:15,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:36:15,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:36:15,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,854 INFO L137 Inliner]: procedures = 94, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 763 [2021-11-19 13:36:15,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:36:15,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:36:15,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:36:15,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:36:15,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:36:15,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:36:15,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:36:15,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:36:15,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (1/1) ... [2021-11-19 13:36:15,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:36:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:16,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:36:16,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:36:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:36:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:36:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:36:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:36:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:36:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:36:16,101 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:36:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:36:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:36:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:36:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:36:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:36:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:36:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:36:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:36:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:36:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:36:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:36:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:36:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:36:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:36:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:36:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:36:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:36:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:36:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:36:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:36:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:36:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:36:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:36:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:36:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:36:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:36:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2021-11-19 13:36:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2021-11-19 13:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:36:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:36:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:36:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:36:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:36:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:36:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:36:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:36:16,109 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:36:16,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:36:16,336 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:36:16,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:36:17,732 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:36:17,762 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:36:17,762 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:36:17,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:36:17 BoogieIcfgContainer [2021-11-19 13:36:17,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:36:17,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:36:17,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:36:17,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:36:17,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:36:14" (1/3) ... [2021-11-19 13:36:17,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b01f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:36:17, skipping insertion in model container [2021-11-19 13:36:17,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:36:15" (2/3) ... [2021-11-19 13:36:17,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b01f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:36:17, skipping insertion in model container [2021-11-19 13:36:17,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:36:17" (3/3) ... [2021-11-19 13:36:17,774 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2021-11-19 13:36:17,780 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:36:17,780 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:36:17,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:36:17,842 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:36:17,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:36:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 13:36:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 13:36:17,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:17,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:17,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -583983565, now seen corresponding path program 1 times [2021-11-19 13:36:17,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:17,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117692880] [2021-11-19 13:36:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:17,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:17,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:17,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:17,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:36:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:36:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:36:18,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:36:19,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:19,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117692880] [2021-11-19 13:36:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117692880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:19,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:19,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:36:19,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851975509] [2021-11-19 13:36:19,080 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:36:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:36:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:36:19,130 INFO L87 Difference]: Start difference. First operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 13:36:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:19,274 INFO L93 Difference]: Finished difference Result 569 states and 948 transitions. [2021-11-19 13:36:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:36:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2021-11-19 13:36:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:19,314 INFO L225 Difference]: With dead ends: 569 [2021-11-19 13:36:19,314 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 13:36:19,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:36:19,326 INFO L933 BasicCegarLoop]: 909 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, 909 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:19,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 13:36:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 13:36:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6997635933806146) internal successors, (719), 444 states have internal predecessors, (719), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 902 transitions. [2021-11-19 13:36:19,475 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 902 transitions. Word has length 79 [2021-11-19 13:36:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:19,483 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 902 transitions. [2021-11-19 13:36:19,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 13:36:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 902 transitions. [2021-11-19 13:36:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 13:36:19,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:19,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:19,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:19,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 295773415, now seen corresponding path program 1 times [2021-11-19 13:36:19,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:19,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349418213] [2021-11-19 13:36:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:19,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:19,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:36:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:20,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:20,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:20,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349418213] [2021-11-19 13:36:20,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349418213] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:20,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:20,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:20,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286887993] [2021-11-19 13:36:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:20,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:20,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:20,621 INFO L87 Difference]: Start difference. First operand 540 states and 902 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:20,759 INFO L93 Difference]: Finished difference Result 1071 states and 1796 transitions. [2021-11-19 13:36:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-11-19 13:36:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:20,767 INFO L225 Difference]: With dead ends: 1071 [2021-11-19 13:36:20,767 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 13:36:20,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 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 13:36:20,777 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 14 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:20,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 13:36:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 13:36:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 444 states have internal predecessors, (718), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 901 transitions. [2021-11-19 13:36:20,827 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 901 transitions. Word has length 81 [2021-11-19 13:36:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:20,827 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 901 transitions. [2021-11-19 13:36:20,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 901 transitions. [2021-11-19 13:36:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 13:36:20,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:20,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:20,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:21,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:21,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1190651257, now seen corresponding path program 1 times [2021-11-19 13:36:21,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:21,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986408371] [2021-11-19 13:36:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:21,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:21,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:21,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:36:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:21,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:21,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:21,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:21,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986408371] [2021-11-19 13:36:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986408371] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:21,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:21,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:21,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705893711] [2021-11-19 13:36:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:21,861 INFO L87 Difference]: Start difference. First operand 540 states and 901 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:21,958 INFO L93 Difference]: Finished difference Result 1071 states and 1794 transitions. [2021-11-19 13:36:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-19 13:36:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:21,966 INFO L225 Difference]: With dead ends: 1071 [2021-11-19 13:36:21,966 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 13:36:21,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 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 13:36:21,972 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 12 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:21,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2657 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 13:36:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 13:36:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 444 states have internal predecessors, (717), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 900 transitions. [2021-11-19 13:36:22,009 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 900 transitions. Word has length 83 [2021-11-19 13:36:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:22,010 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 900 transitions. [2021-11-19 13:36:22,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 900 transitions. [2021-11-19 13:36:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 13:36:22,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:22,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:22,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:22,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:22,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash -756292569, now seen corresponding path program 1 times [2021-11-19 13:36:22,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:22,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264887315] [2021-11-19 13:36:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:22,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:22,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:22,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:36:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:22,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:23,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:23,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264887315] [2021-11-19 13:36:23,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264887315] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:23,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:23,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:23,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806371725] [2021-11-19 13:36:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:23,256 INFO L87 Difference]: Start difference. First operand 540 states and 900 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:23,355 INFO L93 Difference]: Finished difference Result 1075 states and 1797 transitions. [2021-11-19 13:36:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2021-11-19 13:36:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:23,364 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 13:36:23,365 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 13:36:23,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 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 13:36:23,374 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 13 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:23,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 13:36:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 13:36:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6869158878504673) internal successors, (722), 449 states have internal predecessors, (722), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 905 transitions. [2021-11-19 13:36:23,406 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 905 transitions. Word has length 85 [2021-11-19 13:36:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:23,407 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 905 transitions. [2021-11-19 13:36:23,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 905 transitions. [2021-11-19 13:36:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:36:23,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:23,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:23,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:23,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:23,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1855735790, now seen corresponding path program 1 times [2021-11-19 13:36:23,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:23,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571369954] [2021-11-19 13:36:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:23,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:23,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:23,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:23,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:36:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:24,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:24,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:24,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571369954] [2021-11-19 13:36:24,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571369954] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:24,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:24,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:24,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215362775] [2021-11-19 13:36:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:24,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:24,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:24,416 INFO L87 Difference]: Start difference. First operand 546 states and 905 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:24,485 INFO L93 Difference]: Finished difference Result 1074 states and 1788 transitions. [2021-11-19 13:36:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-19 13:36:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:24,491 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 13:36:24,491 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 13:36:24,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 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 13:36:24,498 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:24,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2658 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 13:36:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 13:36:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6845794392523366) internal successors, (721), 449 states have internal predecessors, (721), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 904 transitions. [2021-11-19 13:36:24,532 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 904 transitions. Word has length 86 [2021-11-19 13:36:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:24,533 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 904 transitions. [2021-11-19 13:36:24,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 904 transitions. [2021-11-19 13:36:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 13:36:24,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:24,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:24,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:24,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:24,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 781528715, now seen corresponding path program 1 times [2021-11-19 13:36:24,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:24,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196962910] [2021-11-19 13:36:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:24,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:24,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:24,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:24,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:36:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:25,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:25,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196962910] [2021-11-19 13:36:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196962910] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:25,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:25,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:25,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473008002] [2021-11-19 13:36:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:25,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:25,531 INFO L87 Difference]: Start difference. First operand 546 states and 904 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:25,599 INFO L93 Difference]: Finished difference Result 1074 states and 1787 transitions. [2021-11-19 13:36:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-19 13:36:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:25,605 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 13:36:25,605 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 13:36:25,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 13:36:25,610 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 6 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:25,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2658 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 13:36:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 13:36:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6822429906542056) internal successors, (720), 449 states have internal predecessors, (720), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 903 transitions. [2021-11-19 13:36:25,638 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 903 transitions. Word has length 87 [2021-11-19 13:36:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:25,638 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 903 transitions. [2021-11-19 13:36:25,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 903 transitions. [2021-11-19 13:36:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 13:36:25,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:25,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:25,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:25,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:25,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1002351562, now seen corresponding path program 1 times [2021-11-19 13:36:25,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:25,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990855377] [2021-11-19 13:36:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:25,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:25,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:25,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:25,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:36:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:26,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:26,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:26,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990855377] [2021-11-19 13:36:26,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990855377] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:26,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:26,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:36:26,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25404943] [2021-11-19 13:36:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:26,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:26,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:36:26,775 INFO L87 Difference]: Start difference. First operand 546 states and 903 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:26,986 INFO L93 Difference]: Finished difference Result 1091 states and 1815 transitions. [2021-11-19 13:36:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:26,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-19 13:36:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:26,999 INFO L225 Difference]: With dead ends: 1091 [2021-11-19 13:36:26,999 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 13:36:27,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:36:27,004 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 148 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5215 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:27,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5215 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 13:36:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2021-11-19 13:36:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 467 states have internal predecessors, (746), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-19 13:36:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 934 transitions. [2021-11-19 13:36:27,035 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 934 transitions. Word has length 88 [2021-11-19 13:36:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:27,035 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 934 transitions. [2021-11-19 13:36:27,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 934 transitions. [2021-11-19 13:36:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 13:36:27,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:27,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:27,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:27,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1486026889, now seen corresponding path program 1 times [2021-11-19 13:36:27,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:27,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320813193] [2021-11-19 13:36:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:27,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:27,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:27,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:36:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:36:27,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:28,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:28,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320813193] [2021-11-19 13:36:28,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320813193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:28,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:28,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:36:28,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35696115] [2021-11-19 13:36:28,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:28,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:28,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:28,176 INFO L87 Difference]: Start difference. First operand 565 states and 934 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:28,270 INFO L93 Difference]: Finished difference Result 1104 states and 1837 transitions. [2021-11-19 13:36:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-11-19 13:36:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:28,277 INFO L225 Difference]: With dead ends: 1104 [2021-11-19 13:36:28,277 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 13:36:28,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:28,282 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:28,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2657 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 13:36:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 13:36:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.6809954751131222) internal successors, (743), 464 states have internal predecessors, (743), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 13:36:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 927 transitions. [2021-11-19 13:36:28,314 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 927 transitions. Word has length 88 [2021-11-19 13:36:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 927 transitions. [2021-11-19 13:36:28,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 927 transitions. [2021-11-19 13:36:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 13:36:28,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:28,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:28,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:28,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:28,533 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -530748023, now seen corresponding path program 1 times [2021-11-19 13:36:28,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:28,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181566820] [2021-11-19 13:36:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:28,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:28,536 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:28,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:36:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:29,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:36:29,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:29,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181566820] [2021-11-19 13:36:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181566820] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:29,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583098931] [2021-11-19 13:36:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:29,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:29,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:29,372 INFO L87 Difference]: Start difference. First operand 561 states and 927 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:29,562 INFO L93 Difference]: Finished difference Result 1130 states and 1882 transitions. [2021-11-19 13:36:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-19 13:36:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:29,570 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 13:36:29,570 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 13:36:29,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 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 13:36:29,575 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 134 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:29,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2465 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 13:36:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 13:36:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.669683257918552) internal successors, (738), 464 states have internal predecessors, (738), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 13:36:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 922 transitions. [2021-11-19 13:36:29,602 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 922 transitions. Word has length 89 [2021-11-19 13:36:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:29,602 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 922 transitions. [2021-11-19 13:36:29,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 922 transitions. [2021-11-19 13:36:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 13:36:29,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:29,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:29,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:29,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:29,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1976594173, now seen corresponding path program 1 times [2021-11-19 13:36:29,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:29,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140454070] [2021-11-19 13:36:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:29,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:29,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:29,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:36:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:30,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:36:30,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:30,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140454070] [2021-11-19 13:36:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140454070] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:30,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:30,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:30,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012431150] [2021-11-19 13:36:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:30,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:30,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:30,657 INFO L87 Difference]: Start difference. First operand 561 states and 922 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:30,839 INFO L93 Difference]: Finished difference Result 1130 states and 1872 transitions. [2021-11-19 13:36:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-19 13:36:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:30,853 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 13:36:30,853 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 13:36:30,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 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 13:36:30,857 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 128 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:30,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2465 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 13:36:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 13:36:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.658371040723982) internal successors, (733), 464 states have internal predecessors, (733), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 13:36:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 917 transitions. [2021-11-19 13:36:30,893 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 917 transitions. Word has length 91 [2021-11-19 13:36:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:30,894 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 917 transitions. [2021-11-19 13:36:30,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 917 transitions. [2021-11-19 13:36:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:36:30,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:30,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:30,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:31,119 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -684607959, now seen corresponding path program 1 times [2021-11-19 13:36:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:31,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929880978] [2021-11-19 13:36:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:31,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:31,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:31,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:36:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:31,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:36:31,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:31,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929880978] [2021-11-19 13:36:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929880978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:31,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:31,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:31,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618793704] [2021-11-19 13:36:31,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:31,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:31,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:31,916 INFO L87 Difference]: Start difference. First operand 561 states and 917 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,120 INFO L93 Difference]: Finished difference Result 1151 states and 1893 transitions. [2021-11-19 13:36:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-11-19 13:36:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,127 INFO L225 Difference]: With dead ends: 1151 [2021-11-19 13:36:32,127 INFO L226 Difference]: Without dead ends: 591 [2021-11-19 13:36:32,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 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 13:36:32,133 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 143 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2475 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-19 13:36:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2021-11-19 13:36:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 457 states have (on average 1.636761487964989) internal successors, (748), 478 states have internal predecessors, (748), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 931 transitions. [2021-11-19 13:36:32,162 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 931 transitions. Word has length 93 [2021-11-19 13:36:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:32,162 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 931 transitions. [2021-11-19 13:36:32,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 931 transitions. [2021-11-19 13:36:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:36:32,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:32,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:32,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:32,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:32,378 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1295693399, now seen corresponding path program 1 times [2021-11-19 13:36:32,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:32,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912532252] [2021-11-19 13:36:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:32,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:32,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:32,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:36:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:33,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:33,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912532252] [2021-11-19 13:36:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912532252] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:33,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:33,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:36:33,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845610061] [2021-11-19 13:36:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:33,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:33,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:33,258 INFO L87 Difference]: Start difference. First operand 576 states and 931 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:33,419 INFO L93 Difference]: Finished difference Result 1115 states and 1814 transitions. [2021-11-19 13:36:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-19 13:36:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:33,425 INFO L225 Difference]: With dead ends: 1115 [2021-11-19 13:36:33,426 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:36:33,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:33,430 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 131 mSDsluCounter, 4293 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5183 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:33,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5183 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:36:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 555. [2021-11-19 13:36:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6307339449541285) internal successors, (711), 457 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 894 transitions. [2021-11-19 13:36:33,455 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 894 transitions. Word has length 93 [2021-11-19 13:36:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:33,456 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 894 transitions. [2021-11-19 13:36:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 894 transitions. [2021-11-19 13:36:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 13:36:33,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:33,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:33,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:33,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:33,679 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash 23962835, now seen corresponding path program 1 times [2021-11-19 13:36:33,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:33,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034923833] [2021-11-19 13:36:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:33,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:33,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:33,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:33,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:36:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:36:34,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:34,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034923833] [2021-11-19 13:36:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034923833] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:34,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:34,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:34,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270625112] [2021-11-19 13:36:34,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:34,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:34,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:34,441 INFO L87 Difference]: Start difference. First operand 555 states and 894 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:34,553 INFO L93 Difference]: Finished difference Result 1079 states and 1752 transitions. [2021-11-19 13:36:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-11-19 13:36:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:34,560 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 13:36:34,560 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 13:36:34,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 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 13:36:34,564 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 69 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:34,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2489 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 13:36:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 13:36:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.628440366972477) internal successors, (710), 457 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 893 transitions. [2021-11-19 13:36:34,594 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 893 transitions. Word has length 94 [2021-11-19 13:36:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:34,594 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 893 transitions. [2021-11-19 13:36:34,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 893 transitions. [2021-11-19 13:36:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 13:36:34,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:34,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:34,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:34,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:34,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 832386052, now seen corresponding path program 1 times [2021-11-19 13:36:34,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:34,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831072375] [2021-11-19 13:36:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:34,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:34,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:34,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:36:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:35,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:36:35,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:35,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831072375] [2021-11-19 13:36:35,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831072375] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:35,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:35,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:36:35,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302941109] [2021-11-19 13:36:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:35,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:35,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:35,581 INFO L87 Difference]: Start difference. First operand 555 states and 893 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:35,697 INFO L93 Difference]: Finished difference Result 1079 states and 1751 transitions. [2021-11-19 13:36:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-11-19 13:36:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:35,703 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 13:36:35,704 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 13:36:35,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 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 13:36:35,708 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 67 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2489 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 13:36:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 13:36:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6261467889908257) internal successors, (709), 457 states have internal predecessors, (709), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 892 transitions. [2021-11-19 13:36:35,731 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 892 transitions. Word has length 95 [2021-11-19 13:36:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:35,732 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 892 transitions. [2021-11-19 13:36:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:36:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 892 transitions. [2021-11-19 13:36:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:36:35,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:35,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:35,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:35,948 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 441267086, now seen corresponding path program 1 times [2021-11-19 13:36:35,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:35,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235584861] [2021-11-19 13:36:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:35,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:35,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:35,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:36:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:36:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:36,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:37,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:37,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235584861] [2021-11-19 13:36:37,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235584861] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:37,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:37,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:36:37,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128494611] [2021-11-19 13:36:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:37,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:37,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:37,022 INFO L87 Difference]: Start difference. First operand 555 states and 892 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:37,258 INFO L93 Difference]: Finished difference Result 1084 states and 1758 transitions. [2021-11-19 13:36:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2021-11-19 13:36:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:37,264 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 13:36:37,264 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 13:36:37,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:36:37,270 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 109 mSDsluCounter, 4940 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5774 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:37,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5774 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:36:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 13:36:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2021-11-19 13:36:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 438 states have (on average 1.6210045662100456) internal successors, (710), 459 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 893 transitions. [2021-11-19 13:36:37,292 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 893 transitions. Word has length 96 [2021-11-19 13:36:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:37,293 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 893 transitions. [2021-11-19 13:36:37,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 893 transitions. [2021-11-19 13:36:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 13:36:37,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:37,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:37,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:37,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:37,512 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232527, now seen corresponding path program 1 times [2021-11-19 13:36:37,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:37,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710486522] [2021-11-19 13:36:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:37,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:37,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:37,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:36:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:38,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:38,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:38,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710486522] [2021-11-19 13:36:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710486522] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:38,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:36:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443884149] [2021-11-19 13:36:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:38,469 INFO L87 Difference]: Start difference. First operand 557 states and 893 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:38,709 INFO L93 Difference]: Finished difference Result 1076 states and 1739 transitions. [2021-11-19 13:36:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2021-11-19 13:36:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:38,717 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 13:36:38,717 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:36:38,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:36:38,721 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 77 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5782 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:38,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5782 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:36:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:36:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2021-11-19 13:36:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 440 states have (on average 1.615909090909091) internal successors, (711), 461 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 894 transitions. [2021-11-19 13:36:38,743 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 894 transitions. Word has length 97 [2021-11-19 13:36:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 894 transitions. [2021-11-19 13:36:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:36:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 894 transitions. [2021-11-19 13:36:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 13:36:38,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:38,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:38,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 13:36:38,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:38,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1097218952, now seen corresponding path program 1 times [2021-11-19 13:36:38,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:38,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932235740] [2021-11-19 13:36:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:38,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:38,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:38,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:36:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:39,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:39,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:39,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932235740] [2021-11-19 13:36:39,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932235740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:39,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:39,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:36:39,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673024141] [2021-11-19 13:36:39,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:39,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:36:39,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:36:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:36:39,729 INFO L87 Difference]: Start difference. First operand 559 states and 894 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:39,918 INFO L93 Difference]: Finished difference Result 1022 states and 1666 transitions. [2021-11-19 13:36:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 98 [2021-11-19 13:36:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:39,924 INFO L225 Difference]: With dead ends: 1022 [2021-11-19 13:36:39,925 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 13:36:39,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:36:39,928 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 56 mSDsluCounter, 5865 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6713 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:39,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6713 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 13:36:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 13:36:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 454 states have internal predecessors, (703), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 886 transitions. [2021-11-19 13:36:39,949 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 886 transitions. Word has length 98 [2021-11-19 13:36:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:39,949 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 886 transitions. [2021-11-19 13:36:39,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 886 transitions. [2021-11-19 13:36:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:36:39,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:39,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:39,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 13:36:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:40,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1002933603, now seen corresponding path program 1 times [2021-11-19 13:36:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:40,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068566481] [2021-11-19 13:36:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:40,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:40,172 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:40,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:36:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:40,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:40,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:40,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068566481] [2021-11-19 13:36:40,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068566481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:40,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:40,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:36:40,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030213342] [2021-11-19 13:36:40,984 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:40,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:36:40,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:36:40,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:36:40,985 INFO L87 Difference]: Start difference. First operand 552 states and 886 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:41,193 INFO L93 Difference]: Finished difference Result 1027 states and 1680 transitions. [2021-11-19 13:36:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:41,195 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 99 [2021-11-19 13:36:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:41,199 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 13:36:41,199 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:36:41,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:36:41,202 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 98 mSDsluCounter, 6615 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 7455 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:41,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 7455 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:36:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:36:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:36:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 430 states have (on average 1.6232558139534883) internal successors, (698), 451 states have internal predecessors, (698), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 881 transitions. [2021-11-19 13:36:41,222 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 881 transitions. Word has length 99 [2021-11-19 13:36:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:41,222 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 881 transitions. [2021-11-19 13:36:41,222 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 881 transitions. [2021-11-19 13:36:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:36:41,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:41,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:41,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:41,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:41,443 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1153365533, now seen corresponding path program 1 times [2021-11-19 13:36:41,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:41,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618384095] [2021-11-19 13:36:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:41,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:41,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:41,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:36:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:41,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:41,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:42,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618384095] [2021-11-19 13:36:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618384095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:42,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:42,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:36:42,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871339156] [2021-11-19 13:36:42,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:42,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:42,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:42,212 INFO L87 Difference]: Start difference. First operand 549 states and 881 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 13:36:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:42,342 INFO L93 Difference]: Finished difference Result 1024 states and 1675 transitions. [2021-11-19 13:36:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:42,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2021-11-19 13:36:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:42,348 INFO L225 Difference]: With dead ends: 1024 [2021-11-19 13:36:42,348 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 13:36:42,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:42,352 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 142 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4971 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4971 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 13:36:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 13:36:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.627962085308057) internal successors, (687), 443 states have internal predecessors, (687), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 870 transitions. [2021-11-19 13:36:42,373 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 870 transitions. Word has length 99 [2021-11-19 13:36:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:42,373 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 870 transitions. [2021-11-19 13:36:42,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 13:36:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 870 transitions. [2021-11-19 13:36:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 13:36:42,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:42,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:42,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:42,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:42,594 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 718859772, now seen corresponding path program 1 times [2021-11-19 13:36:42,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:42,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056111977] [2021-11-19 13:36:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:42,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:42,598 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:36:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:36:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:43,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:43,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056111977] [2021-11-19 13:36:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056111977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:43,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:43,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:43,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026170309] [2021-11-19 13:36:43,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:43,505 INFO L87 Difference]: Start difference. First operand 541 states and 870 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:43,688 INFO L93 Difference]: Finished difference Result 1010 states and 1653 transitions. [2021-11-19 13:36:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:43,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 100 [2021-11-19 13:36:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:43,695 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 13:36:43,695 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 13:36:43,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:36:43,698 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 92 mSDsluCounter, 6553 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7388 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:43,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 7388 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 13:36:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 13:36:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.6255924170616114) internal successors, (686), 443 states have internal predecessors, (686), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 869 transitions. [2021-11-19 13:36:43,720 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 869 transitions. Word has length 100 [2021-11-19 13:36:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:43,720 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 869 transitions. [2021-11-19 13:36:43,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 869 transitions. [2021-11-19 13:36:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:36:43,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:43,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:43,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:43,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:43,937 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash 554425345, now seen corresponding path program 1 times [2021-11-19 13:36:43,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:43,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669569555] [2021-11-19 13:36:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:43,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:43,939 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:36:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:36:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:44,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:44,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:44,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669569555] [2021-11-19 13:36:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669569555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:44,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:44,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076892357] [2021-11-19 13:36:44,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:44,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:44,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:44,827 INFO L87 Difference]: Start difference. First operand 541 states and 869 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:45,047 INFO L93 Difference]: Finished difference Result 1054 states and 1710 transitions. [2021-11-19 13:36:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 101 [2021-11-19 13:36:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:45,056 INFO L225 Difference]: With dead ends: 1054 [2021-11-19 13:36:45,056 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 13:36:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:36:45,061 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 190 mSDsluCounter, 4902 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 5725 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:45,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 5725 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 13:36:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 13:36:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6181384248210025) internal successors, (678), 440 states have internal predecessors, (678), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 861 transitions. [2021-11-19 13:36:45,091 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 861 transitions. Word has length 101 [2021-11-19 13:36:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:45,092 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 861 transitions. [2021-11-19 13:36:45,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 861 transitions. [2021-11-19 13:36:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 13:36:45,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:45,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:45,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:45,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:45,310 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash -566525215, now seen corresponding path program 1 times [2021-11-19 13:36:45,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:45,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800846136] [2021-11-19 13:36:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:45,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:45,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:45,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:36:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:45,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:45,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:46,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:46,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800846136] [2021-11-19 13:36:46,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800846136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:46,276 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:46,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:46,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615371759] [2021-11-19 13:36:46,276 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:46,278 INFO L87 Difference]: Start difference. First operand 538 states and 861 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:46,577 INFO L93 Difference]: Finished difference Result 1001 states and 1633 transitions. [2021-11-19 13:36:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 102 [2021-11-19 13:36:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:46,583 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 13:36:46,583 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 13:36:46,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:36:46,589 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 51 mSDsluCounter, 8138 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8962 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:46,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8962 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:36:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 13:36:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 13:36:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6157517899761336) internal successors, (677), 440 states have internal predecessors, (677), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 860 transitions. [2021-11-19 13:36:46,610 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 860 transitions. Word has length 102 [2021-11-19 13:36:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:46,611 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 860 transitions. [2021-11-19 13:36:46,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 860 transitions. [2021-11-19 13:36:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:36:46,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:46,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:46,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:46,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:46,833 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 683115442, now seen corresponding path program 1 times [2021-11-19 13:36:46,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:46,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815525472] [2021-11-19 13:36:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:46,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:46,835 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:46,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:36:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:47,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:47,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:47,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815525472] [2021-11-19 13:36:47,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815525472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:47,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:47,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:47,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663311085] [2021-11-19 13:36:47,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:47,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:47,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:47,821 INFO L87 Difference]: Start difference. First operand 538 states and 860 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:48,013 INFO L93 Difference]: Finished difference Result 1039 states and 1678 transitions. [2021-11-19 13:36:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:48,015 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 103 [2021-11-19 13:36:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:48,020 INFO L225 Difference]: With dead ends: 1039 [2021-11-19 13:36:48,020 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 13:36:48,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:36:48,023 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 88 mSDsluCounter, 6494 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 7316 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:48,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 7316 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 13:36:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 13:36:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6081730769230769) internal successors, (669), 437 states have internal predecessors, (669), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 13:36:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 852 transitions. [2021-11-19 13:36:48,045 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 852 transitions. Word has length 103 [2021-11-19 13:36:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:48,045 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 852 transitions. [2021-11-19 13:36:48,045 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:36:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 852 transitions. [2021-11-19 13:36:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 13:36:48,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:48,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:48,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:48,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:48,262 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1878868346, now seen corresponding path program 1 times [2021-11-19 13:36:48,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:48,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729294268] [2021-11-19 13:36:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:48,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:48,265 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:48,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:36:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:36:49,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:36:49,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:49,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729294268] [2021-11-19 13:36:49,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729294268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:49,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:49,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 13:36:49,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303343592] [2021-11-19 13:36:49,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:49,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:36:49,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:36:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:49,615 INFO L87 Difference]: Start difference. First operand 535 states and 852 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 13:36:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:54,426 INFO L93 Difference]: Finished difference Result 2037 states and 3393 transitions. [2021-11-19 13:36:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2021-11-19 13:36:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:54,442 INFO L225 Difference]: With dead ends: 2037 [2021-11-19 13:36:54,442 INFO L226 Difference]: Without dead ends: 1582 [2021-11-19 13:36:54,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:36:54,447 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 3670 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 3862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:54,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3778 Valid, 2032 Invalid, 3862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 13:36:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-19 13:36:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1390. [2021-11-19 13:36:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1099 states have (on average 1.670609645131938) internal successors, (1836), 1138 states have internal predecessors, (1836), 237 states have call successors, (237), 52 states have call predecessors, (237), 53 states have return successors, (242), 213 states have call predecessors, (242), 232 states have call successors, (242) [2021-11-19 13:36:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2315 transitions. [2021-11-19 13:36:54,578 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2315 transitions. Word has length 104 [2021-11-19 13:36:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:54,579 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 2315 transitions. [2021-11-19 13:36:54,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 13:36:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2315 transitions. [2021-11-19 13:36:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:36:54,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:54,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:54,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:54,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:54,800 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1373298605, now seen corresponding path program 1 times [2021-11-19 13:36:54,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:54,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819323036] [2021-11-19 13:36:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:54,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:54,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:54,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:36:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:36:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:36:55,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:36:56,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:56,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819323036] [2021-11-19 13:36:56,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819323036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:56,121 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:56,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:56,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396710321] [2021-11-19 13:36:56,122 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:56,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:56,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:56,123 INFO L87 Difference]: Start difference. First operand 1390 states and 2315 transitions. Second operand has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:37:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:04,334 INFO L93 Difference]: Finished difference Result 4401 states and 7417 transitions. [2021-11-19 13:37:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:37:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 132 [2021-11-19 13:37:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:04,366 INFO L225 Difference]: With dead ends: 4401 [2021-11-19 13:37:04,366 INFO L226 Difference]: Without dead ends: 3091 [2021-11-19 13:37:04,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:37:04,378 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 2863 mSDsluCounter, 3801 mSDsCounter, 0 mSdLazyCounter, 7670 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 8628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 7670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:04,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2949 Valid, 5518 Invalid, 8628 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [958 Valid, 7670 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 13:37:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-19 13:37:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2733. [2021-11-19 13:37:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2072 states have (on average 1.640926640926641) internal successors, (3400), 2164 states have internal predecessors, (3400), 556 states have call successors, (556), 87 states have call predecessors, (556), 104 states have return successors, (592), 514 states have call predecessors, (592), 551 states have call successors, (592) [2021-11-19 13:37:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 4548 transitions. [2021-11-19 13:37:04,678 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 4548 transitions. Word has length 132 [2021-11-19 13:37:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:04,679 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 4548 transitions. [2021-11-19 13:37:04,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:37:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 4548 transitions. [2021-11-19 13:37:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:37:04,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:04,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:04,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:04,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:04,916 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -404411890, now seen corresponding path program 1 times [2021-11-19 13:37:04,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:04,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644162428] [2021-11-19 13:37:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:04,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:04,920 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:37:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:37:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:05,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:07,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:07,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644162428] [2021-11-19 13:37:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644162428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:07,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:37:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323090270] [2021-11-19 13:37:07,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:37:07,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:37:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:37:07,085 INFO L87 Difference]: Start difference. First operand 2733 states and 4548 transitions. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:37:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:10,843 INFO L93 Difference]: Finished difference Result 6169 states and 10484 transitions. [2021-11-19 13:37:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) Word has length 133 [2021-11-19 13:37:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:10,881 INFO L225 Difference]: With dead ends: 6169 [2021-11-19 13:37:10,881 INFO L226 Difference]: Without dead ends: 3516 [2021-11-19 13:37:10,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 253 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 13:37:10,906 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 1372 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 3723 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 3093 SdHoareTripleChecker+Invalid, 4260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:10,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 3093 Invalid, 4260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3723 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 13:37:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-11-19 13:37:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 2757. [2021-11-19 13:37:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2090 states have (on average 1.6354066985645932) internal successors, (3418), 2182 states have internal predecessors, (3418), 556 states have call successors, (556), 87 states have call predecessors, (556), 110 states have return successors, (658), 520 states have call predecessors, (658), 551 states have call successors, (658) [2021-11-19 13:37:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4632 transitions. [2021-11-19 13:37:11,177 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4632 transitions. Word has length 133 [2021-11-19 13:37:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:11,178 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 4632 transitions. [2021-11-19 13:37:11,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:37:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4632 transitions. [2021-11-19 13:37:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:37:11,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:11,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:11,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:11,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:11,398 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2044939391, now seen corresponding path program 1 times [2021-11-19 13:37:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:11,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845596442] [2021-11-19 13:37:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:11,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:11,400 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:37:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:12,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:12,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:12,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845596442] [2021-11-19 13:37:12,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845596442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:12,866 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:12,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 13:37:12,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168316914] [2021-11-19 13:37:12,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:12,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:37:12,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:37:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:37:12,869 INFO L87 Difference]: Start difference. First operand 2757 states and 4632 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-19 13:37:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:19,344 INFO L93 Difference]: Finished difference Result 8944 states and 15420 transitions. [2021-11-19 13:37:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:37:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 134 [2021-11-19 13:37:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:19,392 INFO L225 Difference]: With dead ends: 8944 [2021-11-19 13:37:19,392 INFO L226 Difference]: Without dead ends: 6267 [2021-11-19 13:37:19,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 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 13:37:19,406 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 4643 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 5033 mSolverCounterSat, 1297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4718 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 6330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 5033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:19,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4718 Valid, 3984 Invalid, 6330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1297 Valid, 5033 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 13:37:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-11-19 13:37:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5961. [2021-11-19 13:37:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5961 states, 4518 states have (on average 1.6328021248339974) internal successors, (7377), 4738 states have internal predecessors, (7377), 1189 states have call successors, (1189), 215 states have call predecessors, (1189), 253 states have return successors, (1363), 1084 states have call predecessors, (1363), 1184 states have call successors, (1363) [2021-11-19 13:37:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 9929 transitions. [2021-11-19 13:37:19,857 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 9929 transitions. Word has length 134 [2021-11-19 13:37:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:19,858 INFO L470 AbstractCegarLoop]: Abstraction has 5961 states and 9929 transitions. [2021-11-19 13:37:19,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-19 13:37:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 9929 transitions. [2021-11-19 13:37:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:37:19,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:19,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:19,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:20,077 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1455544825, now seen corresponding path program 1 times [2021-11-19 13:37:20,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:20,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73773389] [2021-11-19 13:37:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:20,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:20,079 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:20,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:37:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:37:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:20,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:21,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:21,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73773389] [2021-11-19 13:37:21,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73773389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:21,520 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:21,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 13:37:21,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642023730] [2021-11-19 13:37:21,521 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:21,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:37:21,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:21,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:37:21,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:37:21,523 INFO L87 Difference]: Start difference. First operand 5961 states and 9929 transitions. Second operand has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:37:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:30,406 INFO L93 Difference]: Finished difference Result 22715 states and 39068 transitions. [2021-11-19 13:37:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:37:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 136 [2021-11-19 13:37:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:30,545 INFO L225 Difference]: With dead ends: 22715 [2021-11-19 13:37:30,545 INFO L226 Difference]: Without dead ends: 16816 [2021-11-19 13:37:30,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:37:30,582 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 4525 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 7444 mSolverCounterSat, 1957 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4624 SdHoareTripleChecker+Valid, 4394 SdHoareTripleChecker+Invalid, 9401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1957 IncrementalHoareTripleChecker+Valid, 7444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:30,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4624 Valid, 4394 Invalid, 9401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1957 Valid, 7444 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-19 13:37:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16816 states. [2021-11-19 13:37:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16816 to 10492. [2021-11-19 13:37:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 7829 states have (on average 1.6228126197470942) internal successors, (12705), 8252 states have internal predecessors, (12705), 2229 states have call successors, (2229), 333 states have call predecessors, (2229), 433 states have return successors, (2584), 2095 states have call predecessors, (2584), 2224 states have call successors, (2584) [2021-11-19 13:37:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 17518 transitions. [2021-11-19 13:37:31,865 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 17518 transitions. Word has length 136 [2021-11-19 13:37:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:31,868 INFO L470 AbstractCegarLoop]: Abstraction has 10492 states and 17518 transitions. [2021-11-19 13:37:31,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:37:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 17518 transitions. [2021-11-19 13:37:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:37:31,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:31,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:31,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:32,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:32,086 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1879191547, now seen corresponding path program 1 times [2021-11-19 13:37:32,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:32,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200279438] [2021-11-19 13:37:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:32,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:32,088 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:32,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 13:37:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:37:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:33,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:33,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200279438] [2021-11-19 13:37:33,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200279438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:33,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:33,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 13:37:33,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336392594] [2021-11-19 13:37:33,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:33,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:37:33,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:37:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:37:33,440 INFO L87 Difference]: Start difference. First operand 10492 states and 17518 transitions. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 13:37:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:39,042 INFO L93 Difference]: Finished difference Result 30720 states and 52180 transitions. [2021-11-19 13:37:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:37:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 136 [2021-11-19 13:37:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:39,206 INFO L225 Difference]: With dead ends: 30720 [2021-11-19 13:37:39,206 INFO L226 Difference]: Without dead ends: 21879 [2021-11-19 13:37:39,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 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 13:37:39,258 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 3444 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:39,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3518 Valid, 2405 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 13:37:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21879 states. [2021-11-19 13:37:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21879 to 20881. [2021-11-19 13:37:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20881 states, 15548 states have (on average 1.6214304090558271) internal successors, (25210), 16459 states have internal predecessors, (25210), 4372 states have call successors, (4372), 635 states have call predecessors, (4372), 960 states have return successors, (5567), 4137 states have call predecessors, (5567), 4367 states have call successors, (5567) [2021-11-19 13:37:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20881 states to 20881 states and 35149 transitions. [2021-11-19 13:37:41,454 INFO L78 Accepts]: Start accepts. Automaton has 20881 states and 35149 transitions. Word has length 136 [2021-11-19 13:37:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:41,455 INFO L470 AbstractCegarLoop]: Abstraction has 20881 states and 35149 transitions. [2021-11-19 13:37:41,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 13:37:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20881 states and 35149 transitions. [2021-11-19 13:37:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:37:41,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:41,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:41,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:41,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:41,680 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1001590863, now seen corresponding path program 1 times [2021-11-19 13:37:41,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:41,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852055390] [2021-11-19 13:37:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:41,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:41,685 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:41,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:37:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:37:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:42,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:44,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:44,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852055390] [2021-11-19 13:37:44,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852055390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:44,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:44,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 13:37:44,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21090134] [2021-11-19 13:37:44,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:44,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:37:44,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:37:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:37:44,093 INFO L87 Difference]: Start difference. First operand 20881 states and 35149 transitions. Second operand has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 13:37:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:54,622 INFO L93 Difference]: Finished difference Result 58770 states and 99820 transitions. [2021-11-19 13:37:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:37:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) Word has length 141 [2021-11-19 13:37:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:54,973 INFO L225 Difference]: With dead ends: 58770 [2021-11-19 13:37:54,973 INFO L226 Difference]: Without dead ends: 39078 [2021-11-19 13:37:55,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:37:55,114 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 3326 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 6194 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3400 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 7086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 6194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:55,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3400 Valid, 3282 Invalid, 7086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 6194 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-11-19 13:37:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39078 states. [2021-11-19 13:37:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39078 to 38556. [2021-11-19 13:37:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38556 states, 28470 states have (on average 1.6032665964172814) internal successors, (45645), 30154 states have internal predecessors, (45645), 8244 states have call successors, (8244), 1217 states have call predecessors, (8244), 1841 states have return successors, (10814), 7859 states have call predecessors, (10814), 8239 states have call successors, (10814) [2021-11-19 13:37:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38556 states to 38556 states and 64703 transitions. [2021-11-19 13:37:58,412 INFO L78 Accepts]: Start accepts. Automaton has 38556 states and 64703 transitions. Word has length 141 [2021-11-19 13:37:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:58,412 INFO L470 AbstractCegarLoop]: Abstraction has 38556 states and 64703 transitions. [2021-11-19 13:37:58,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 13:37:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 38556 states and 64703 transitions. [2021-11-19 13:37:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 13:37:58,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:58,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:58,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:58,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:58,638 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1290515199, now seen corresponding path program 1 times [2021-11-19 13:37:58,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:58,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372990003] [2021-11-19 13:37:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:58,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:58,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 13:37:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:59,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:37:59,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:59,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372990003] [2021-11-19 13:37:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372990003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:59,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:37:59,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013546170] [2021-11-19 13:37:59,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:59,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:59,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:59,699 INFO L87 Difference]: Start difference. First operand 38556 states and 64703 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 13:38:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:02,977 INFO L93 Difference]: Finished difference Result 78185 states and 132933 transitions. [2021-11-19 13:38:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:38:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 148 [2021-11-19 13:38:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:03,404 INFO L225 Difference]: With dead ends: 78185 [2021-11-19 13:38:03,405 INFO L226 Difference]: Without dead ends: 38556 [2021-11-19 13:38:03,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 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 13:38:03,623 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 310 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:03,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 3044 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38556 states. [2021-11-19 13:38:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38556 to 38556. [2021-11-19 13:38:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38556 states, 28470 states have (on average 1.5845100105374077) internal successors, (45111), 30154 states have internal predecessors, (45111), 8244 states have call successors, (8244), 1217 states have call predecessors, (8244), 1841 states have return successors, (10814), 7859 states have call predecessors, (10814), 8239 states have call successors, (10814) [2021-11-19 13:38:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38556 states to 38556 states and 64169 transitions. [2021-11-19 13:38:06,590 INFO L78 Accepts]: Start accepts. Automaton has 38556 states and 64169 transitions. Word has length 148 [2021-11-19 13:38:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:06,591 INFO L470 AbstractCegarLoop]: Abstraction has 38556 states and 64169 transitions. [2021-11-19 13:38:06,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 13:38:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 38556 states and 64169 transitions. [2021-11-19 13:38:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 13:38:06,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:06,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:06,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:06,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:06,814 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash 266568332, now seen corresponding path program 1 times [2021-11-19 13:38:06,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:06,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866951802] [2021-11-19 13:38:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:06,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:06,816 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:06,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 13:38:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:38:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:38:07,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:38:08,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:08,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866951802] [2021-11-19 13:38:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866951802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:08,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:08,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 13:38:08,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328021422] [2021-11-19 13:38:08,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:08,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:38:08,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:38:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:38:08,362 INFO L87 Difference]: Start difference. First operand 38556 states and 64169 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:38:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:15,571 INFO L93 Difference]: Finished difference Result 79458 states and 133140 transitions. [2021-11-19 13:38:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:38:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 153 [2021-11-19 13:38:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:15,894 INFO L225 Difference]: With dead ends: 79458 [2021-11-19 13:38:15,895 INFO L226 Difference]: Without dead ends: 42722 [2021-11-19 13:38:16,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 301 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 13:38:16,085 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 4013 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:16,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 2131 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 2757 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 13:38:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42722 states. [2021-11-19 13:38:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42722 to 40212. [2021-11-19 13:38:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40212 states, 29712 states have (on average 1.5740105008077545) internal successors, (46767), 31486 states have internal predecessors, (46767), 8415 states have call successors, (8415), 1361 states have call predecessors, (8415), 2084 states have return successors, (11237), 8039 states have call predecessors, (11237), 8410 states have call successors, (11237) [2021-11-19 13:38:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40212 states to 40212 states and 66419 transitions. [2021-11-19 13:38:19,549 INFO L78 Accepts]: Start accepts. Automaton has 40212 states and 66419 transitions. Word has length 153 [2021-11-19 13:38:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 40212 states and 66419 transitions. [2021-11-19 13:38:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:38:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 40212 states and 66419 transitions. [2021-11-19 13:38:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 13:38:19,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:19,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:19,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:19,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:19,782 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1276207898, now seen corresponding path program 1 times [2021-11-19 13:38:19,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:19,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431380128] [2021-11-19 13:38:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:19,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:19,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:19,785 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 13:38:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:38:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:38:20,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:38:21,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:21,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431380128] [2021-11-19 13:38:21,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431380128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:21,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:21,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:38:21,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435859128] [2021-11-19 13:38:21,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:21,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:38:21,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:38:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:38:21,907 INFO L87 Difference]: Start difference. First operand 40212 states and 66419 transitions. Second operand has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 13:38:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:33,692 INFO L93 Difference]: Finished difference Result 110573 states and 185566 transitions. [2021-11-19 13:38:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:38:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) Word has length 158 [2021-11-19 13:38:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:34,222 INFO L225 Difference]: With dead ends: 110573 [2021-11-19 13:38:34,223 INFO L226 Difference]: Without dead ends: 72159 [2021-11-19 13:38:34,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:38:34,605 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 3141 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 4947 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3212 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 5830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 4947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:34,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3212 Valid, 2908 Invalid, 5830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 4947 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 13:38:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72159 states. [2021-11-19 13:38:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72159 to 71931. [2021-11-19 13:38:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71931 states, 52939 states have (on average 1.5801016264001964) internal successors, (83649), 55972 states have internal predecessors, (83649), 15598 states have call successors, (15598), 2471 states have call predecessors, (15598), 3393 states have return successors, (20279), 14810 states have call predecessors, (20279), 15593 states have call successors, (20279) [2021-11-19 13:38:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71931 states to 71931 states and 119526 transitions. [2021-11-19 13:38:39,895 INFO L78 Accepts]: Start accepts. Automaton has 71931 states and 119526 transitions. Word has length 158 [2021-11-19 13:38:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:39,896 INFO L470 AbstractCegarLoop]: Abstraction has 71931 states and 119526 transitions. [2021-11-19 13:38:39,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 13:38:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71931 states and 119526 transitions. [2021-11-19 13:38:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 13:38:39,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:39,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:39,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 13:38:40,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:40,105 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1338247512, now seen corresponding path program 1 times [2021-11-19 13:38:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:40,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183516695] [2021-11-19 13:38:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:40,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:40,108 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:40,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31de18f6-0962-4d2f-aff7-dea25421d105/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 13:38:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:38:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:38:40,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:38:41,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:41,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183516695] [2021-11-19 13:38:41,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183516695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:41,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:41,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:38:41,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206968255] [2021-11-19 13:38:41,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:41,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:38:41,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:38:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:38:41,767 INFO L87 Difference]: Start difference. First operand 71931 states and 119526 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30)