./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.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_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/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_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/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_637b4695-f1fc-4403-8cc4-a16400328970/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 f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:42,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:42,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:42,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:42,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:42,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:42,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:42,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:42,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:42,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:42,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:42,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:42,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:42,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:42,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:42,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:42,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:42,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:42,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:42,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:42,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:42,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:42,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:42,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:42,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:42,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:42,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:42,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:42,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:42,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:42,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:42,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:42,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:42,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:42,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:42,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:42,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:42,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:42,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:42,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:42,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:42,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:42,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:42,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:42,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:42,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:42,964 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:42,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:42,964 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:42,965 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:42,965 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:42,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:42,965 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:42,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:42,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:42,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:42,967 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:42,967 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:42,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:42,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:42,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:42,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:42,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:42,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:42,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:42,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:42,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:42,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:42,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:42,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:42,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:42,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:42,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:42,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:42,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:42,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:42,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:42,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:42,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:42,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:42,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:42,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:42,974 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_637b4695-f1fc-4403-8cc4-a16400328970/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2021-11-19 14:14:43,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:43,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:43,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:43,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:43,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:43,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-19 14:14:43,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/bef0babc3/2a61970de8494f6795dfc2f8b851debb/FLAGe9c89dc47 [2021-11-19 14:14:43,956 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:43,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-19 14:14:43,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/bef0babc3/2a61970de8494f6795dfc2f8b851debb/FLAGe9c89dc47 [2021-11-19 14:14:44,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/bef0babc3/2a61970de8494f6795dfc2f8b851debb [2021-11-19 14:14:44,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:44,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:44,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:44,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:44,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:44,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:44" (1/1) ... [2021-11-19 14:14:44,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28996cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:44, skipping insertion in model container [2021-11-19 14:14:44,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:44" (1/1) ... [2021-11-19 14:14:44,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:44,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:44,539 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_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-19 14:14:44,803 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:44,814 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:14:44,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d462e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:44, skipping insertion in model container [2021-11-19 14:14:44,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:44,815 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:44,817 INFO L158 Benchmark]: Toolchain (without parser) took 659.51ms. Allocated memory is still 94.4MB. Free memory was 71.9MB in the beginning and 57.7MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:44,818 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 94.4MB. Free memory was 70.5MB in the beginning and 70.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:44,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 657.24ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 57.7MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:14:44,821 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 94.4MB. Free memory was 70.5MB in the beginning and 70.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 657.24ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 57.7MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2996]: 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_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/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_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/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_637b4695-f1fc-4403-8cc4-a16400328970/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 f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:47,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:47,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:47,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:47,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:47,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:47,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:47,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:47,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:47,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:47,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:47,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:47,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:47,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:47,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:47,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:47,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:47,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:47,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:47,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:47,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:47,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:47,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:47,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:47,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:47,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:47,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:47,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:47,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:47,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:47,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:47,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:47,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:47,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:47,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:47,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:47,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:47,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:47,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:47,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:47,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:47,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:47,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:47,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:47,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:47,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:47,286 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:47,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:47,287 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:47,287 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:47,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:47,287 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:47,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:47,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:47,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:47,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:47,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:47,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:47,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:47,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:47,292 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:47,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:47,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:47,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:47,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:47,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:47,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:47,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:47,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:47,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:47,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:47,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:47,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:47,295 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:47,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:47,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:47,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:47,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:47,296 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_637b4695-f1fc-4403-8cc4-a16400328970/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2021-11-19 14:14:47,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:47,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:47,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:47,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:47,776 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:47,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-19 14:14:47,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/28e657f0c/fd7968f95c534cfbb441a63993f312e6/FLAG7bf51a714 [2021-11-19 14:14:48,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:48,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-19 14:14:48,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/28e657f0c/fd7968f95c534cfbb441a63993f312e6/FLAG7bf51a714 [2021-11-19 14:14:48,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/data/28e657f0c/fd7968f95c534cfbb441a63993f312e6 [2021-11-19 14:14:48,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:48,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:48,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:48,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:48,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:48,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:48" (1/1) ... [2021-11-19 14:14:48,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67af464b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:48, skipping insertion in model container [2021-11-19 14:14:48,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:48" (1/1) ... [2021-11-19 14:14:48,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:48,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:49,199 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_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-19 14:14:49,550 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:49,563 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:49,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:49,607 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_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-19 14:14:49,686 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:49,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:49,716 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_637b4695-f1fc-4403-8cc4-a16400328970/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-19 14:14:49,819 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:49,856 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:49,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49 WrapperNode [2021-11-19 14:14:49,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:49,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:49,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:49,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:49,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:49,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:49,993 INFO L137 Inliner]: procedures = 92, calls = 332, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 760 [2021-11-19 14:14:49,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:49,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:49,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:49,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:50,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:50,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:50,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:50,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:50,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (1/1) ... [2021-11-19 14:14:50,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:50,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:50,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:50,188 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:14:50,189 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:14:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:14:50,189 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:14:50,189 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:50,190 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:50,190 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:14:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:14:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:14:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:14:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:50,191 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:50,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:50,192 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:50,192 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:50,192 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:50,193 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:50,193 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:50,194 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:50,194 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:50,196 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:50,386 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:50,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:51,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:51,652 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:51,653 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:51,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:51 BoogieIcfgContainer [2021-11-19 14:14:51,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:51,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:51,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:51,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:51,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:48" (1/3) ... [2021-11-19 14:14:51,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729740a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:51, skipping insertion in model container [2021-11-19 14:14:51,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:49" (2/3) ... [2021-11-19 14:14:51,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729740a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:51, skipping insertion in model container [2021-11-19 14:14:51,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:51" (3/3) ... [2021-11-19 14:14:51,665 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product17.cil.c [2021-11-19 14:14:51,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:51,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:51,746 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:51,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:14:51,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 532 states, 421 states have (on average 1.7102137767220902) internal successors, (720), 442 states have internal predecessors, (720), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 14:14:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 14:14:51,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:51,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:51,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1249329355, now seen corresponding path program 1 times [2021-11-19 14:14:51,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:51,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011630735] [2021-11-19 14:14:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:51,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:51,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:51,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:52,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:52,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011630735] [2021-11-19 14:14:52,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011630735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:52,816 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:52,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:52,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440921101] [2021-11-19 14:14:52,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:52,864 INFO L87 Difference]: Start difference. First operand has 532 states, 421 states have (on average 1.7102137767220902) internal successors, (720), 442 states have internal predecessors, (720), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 14:14:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:52,976 INFO L93 Difference]: Finished difference Result 553 states and 926 transitions. [2021-11-19 14:14:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:52,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2021-11-19 14:14:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:53,011 INFO L225 Difference]: With dead ends: 553 [2021-11-19 14:14:53,012 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 14:14:53,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:53,021 INFO L933 BasicCegarLoop]: 887 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, 887 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:53,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 14:14:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-11-19 14:14:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 415 states have (on average 1.7084337349397591) internal successors, (709), 434 states have internal predecessors, (709), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 880 transitions. [2021-11-19 14:14:53,125 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 880 transitions. Word has length 74 [2021-11-19 14:14:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:53,127 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 880 transitions. [2021-11-19 14:14:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 14:14:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 880 transitions. [2021-11-19 14:14:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 14:14:53,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:53,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:53,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:53,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:53,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 559470175, now seen corresponding path program 1 times [2021-11-19 14:14:53,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:53,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737957542] [2021-11-19 14:14:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:53,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:53,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:53,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:53,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:54,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:54,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737957542] [2021-11-19 14:14:54,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737957542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:54,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:54,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:54,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745506632] [2021-11-19 14:14:54,239 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:54,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:54,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:54,243 INFO L87 Difference]: Start difference. First operand 524 states and 880 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:54,384 INFO L93 Difference]: Finished difference Result 1032 states and 1738 transitions. [2021-11-19 14:14:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 76 [2021-11-19 14:14:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:54,393 INFO L225 Difference]: With dead ends: 1032 [2021-11-19 14:14:54,394 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 14:14:54,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:54,404 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 30 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:54,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1733 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 14:14:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-11-19 14:14:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 415 states have (on average 1.693975903614458) internal successors, (703), 434 states have internal predecessors, (703), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 874 transitions. [2021-11-19 14:14:54,468 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 874 transitions. Word has length 76 [2021-11-19 14:14:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:54,469 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 874 transitions. [2021-11-19 14:14:54,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:14:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 874 transitions. [2021-11-19 14:14:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 14:14:54,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:54,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:54,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -719724079, now seen corresponding path program 1 times [2021-11-19 14:14:54,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:54,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360246770] [2021-11-19 14:14:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:54,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:54,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:55,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:55,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360246770] [2021-11-19 14:14:55,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360246770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:55,539 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:55,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:55,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728819608] [2021-11-19 14:14:55,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:55,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:55,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:55,542 INFO L87 Difference]: Start difference. First operand 524 states and 874 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:55,764 INFO L93 Difference]: Finished difference Result 990 states and 1655 transitions. [2021-11-19 14:14:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 81 [2021-11-19 14:14:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:55,773 INFO L225 Difference]: With dead ends: 990 [2021-11-19 14:14:55,774 INFO L226 Difference]: Without dead ends: 518 [2021-11-19 14:14:55,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:55,781 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 118 mSDsluCounter, 5859 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6720 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:55,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6720 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-19 14:14:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2021-11-19 14:14:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 409 states have (on average 1.687041564792176) internal successors, (690), 428 states have internal predecessors, (690), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 861 transitions. [2021-11-19 14:14:55,825 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 861 transitions. Word has length 81 [2021-11-19 14:14:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:55,825 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 861 transitions. [2021-11-19 14:14:55,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 861 transitions. [2021-11-19 14:14:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 14:14:55,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:55,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:55,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:56,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:56,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash -382803110, now seen corresponding path program 1 times [2021-11-19 14:14:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:56,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920268703] [2021-11-19 14:14:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:56,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:56,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:56,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:56,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:56,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:56,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920268703] [2021-11-19 14:14:56,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920268703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:56,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:56,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:56,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192106864] [2021-11-19 14:14:56,837 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:56,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:56,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:56,839 INFO L87 Difference]: Start difference. First operand 518 states and 861 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:57,038 INFO L93 Difference]: Finished difference Result 993 states and 1656 transitions. [2021-11-19 14:14:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-19 14:14:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:57,045 INFO L225 Difference]: With dead ends: 993 [2021-11-19 14:14:57,046 INFO L226 Difference]: Without dead ends: 518 [2021-11-19 14:14:57,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:57,056 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 112 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 4008 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:57,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 4008 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-19 14:14:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2021-11-19 14:14:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 409 states have (on average 1.628361858190709) internal successors, (666), 428 states have internal predecessors, (666), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 837 transitions. [2021-11-19 14:14:57,105 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 837 transitions. Word has length 82 [2021-11-19 14:14:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:57,105 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 837 transitions. [2021-11-19 14:14:57,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 837 transitions. [2021-11-19 14:14:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 14:14:57,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:57,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:57,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:57,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:57,337 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -129438689, now seen corresponding path program 1 times [2021-11-19 14:14:57,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:57,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471956581] [2021-11-19 14:14:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:57,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:57,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:57,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:57,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:58,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:58,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471956581] [2021-11-19 14:14:58,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471956581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:58,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:58,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:58,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677086920] [2021-11-19 14:14:58,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:58,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:58,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:58,166 INFO L87 Difference]: Start difference. First operand 518 states and 837 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:58,287 INFO L93 Difference]: Finished difference Result 984 states and 1618 transitions. [2021-11-19 14:14:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2021-11-19 14:14:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:58,294 INFO L225 Difference]: With dead ends: 984 [2021-11-19 14:14:58,294 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 14:14:58,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:58,298 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 117 mSDsluCounter, 4062 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4887 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:58,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4887 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 14:14:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2021-11-19 14:14:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 388 states have (on average 1.652061855670103) internal successors, (641), 407 states have internal predecessors, (641), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 812 transitions. [2021-11-19 14:14:58,325 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 812 transitions. Word has length 84 [2021-11-19 14:14:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 812 transitions. [2021-11-19 14:14:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 812 transitions. [2021-11-19 14:14:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:14:58,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:58,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:58,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,545 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1365833502, now seen corresponding path program 1 times [2021-11-19 14:14:58,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:58,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548774200] [2021-11-19 14:14:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:58,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:58,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:58,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:58,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:59,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:59,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:59,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548774200] [2021-11-19 14:14:59,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548774200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:59,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:59,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:14:59,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845332196] [2021-11-19 14:14:59,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:59,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:14:59,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:14:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:59,571 INFO L87 Difference]: Start difference. First operand 497 states and 812 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:59,765 INFO L93 Difference]: Finished difference Result 957 states and 1582 transitions. [2021-11-19 14:14:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-19 14:14:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,771 INFO L225 Difference]: With dead ends: 957 [2021-11-19 14:14:59,771 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 14:14:59,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:14:59,775 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 45 mSDsluCounter, 7145 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7942 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 7942 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 14:14:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2021-11-19 14:14:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 388 states have (on average 1.6494845360824741) internal successors, (640), 407 states have internal predecessors, (640), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-19 14:14:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 811 transitions. [2021-11-19 14:14:59,800 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 811 transitions. Word has length 87 [2021-11-19 14:14:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 811 transitions. [2021-11-19 14:14:59,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:14:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 811 transitions. [2021-11-19 14:14:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:14:59,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:59,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:59,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:00,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 107826425, now seen corresponding path program 1 times [2021-11-19 14:15:00,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:00,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440579886] [2021-11-19 14:15:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:00,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:00,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:00,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:15:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:00,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:01,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:01,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440579886] [2021-11-19 14:15:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440579886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:01,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:15:01,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251335439] [2021-11-19 14:15:01,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:01,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:15:01,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:15:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:15:01,394 INFO L87 Difference]: Start difference. First operand 497 states and 811 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 14:15:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:05,365 INFO L93 Difference]: Finished difference Result 1086 states and 1825 transitions. [2021-11-19 14:15:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2021-11-19 14:15:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:05,375 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 14:15:05,375 INFO L226 Difference]: Without dead ends: 634 [2021-11-19 14:15:05,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:15:05,379 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 1385 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:05,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 3127 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3765 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 14:15:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-19 14:15:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 501. [2021-11-19 14:15:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 391 states have (on average 1.6445012787723785) internal successors, (643), 410 states have internal predecessors, (643), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (99), 82 states have call predecessors, (99), 83 states have call successors, (99) [2021-11-19 14:15:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 830 transitions. [2021-11-19 14:15:05,417 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 830 transitions. Word has length 88 [2021-11-19 14:15:05,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:05,418 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 830 transitions. [2021-11-19 14:15:05,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 14:15:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 830 transitions. [2021-11-19 14:15:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:15:05,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:05,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:05,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:05,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2116141856, now seen corresponding path program 1 times [2021-11-19 14:15:05,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:05,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057177631] [2021-11-19 14:15:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:05,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:05,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:05,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:15:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:05,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:06,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:06,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:06,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057177631] [2021-11-19 14:15:06,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057177631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:06,664 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:06,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:15:06,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696269052] [2021-11-19 14:15:06,665 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:06,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:15:06,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:15:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:06,667 INFO L87 Difference]: Start difference. First operand 501 states and 830 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 14:15:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:12,055 INFO L93 Difference]: Finished difference Result 1826 states and 3136 transitions. [2021-11-19 14:15:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:15:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2021-11-19 14:15:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:12,070 INFO L225 Difference]: With dead ends: 1826 [2021-11-19 14:15:12,070 INFO L226 Difference]: Without dead ends: 1370 [2021-11-19 14:15:12,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:15:12,076 INFO L933 BasicCegarLoop]: 1360 mSDtfsCounter, 3488 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3563 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:12,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3563 Valid, 3692 Invalid, 5835 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1052 Valid, 4783 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 14:15:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-11-19 14:15:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1282. [2021-11-19 14:15:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 997 states have (on average 1.6589769307923772) internal successors, (1654), 1045 states have internal predecessors, (1654), 229 states have call successors, (229), 54 states have call predecessors, (229), 55 states have return successors, (247), 219 states have call predecessors, (247), 224 states have call successors, (247) [2021-11-19 14:15:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2130 transitions. [2021-11-19 14:15:12,220 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2130 transitions. Word has length 89 [2021-11-19 14:15:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2130 transitions. [2021-11-19 14:15:12,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 14:15:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2130 transitions. [2021-11-19 14:15:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:15:12,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:12,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:12,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1766114009, now seen corresponding path program 1 times [2021-11-19 14:15:12,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:12,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800972258] [2021-11-19 14:15:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:12,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:12,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:15:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:13,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:13,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:13,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800972258] [2021-11-19 14:15:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800972258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:13,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:13,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 14:15:13,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914875093] [2021-11-19 14:15:13,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:13,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:15:13,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:13,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:15:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:13,487 INFO L87 Difference]: Start difference. First operand 1282 states and 2130 transitions. Second operand has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:15:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:21,648 INFO L93 Difference]: Finished difference Result 6365 states and 11008 transitions. [2021-11-19 14:15:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:15:21,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 91 [2021-11-19 14:15:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:21,703 INFO L225 Difference]: With dead ends: 6365 [2021-11-19 14:15:21,704 INFO L226 Difference]: Without dead ends: 5128 [2021-11-19 14:15:21,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 171 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 14:15:21,719 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 7507 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 3328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7610 SdHoareTripleChecker+Valid, 3797 SdHoareTripleChecker+Invalid, 8870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3328 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:21,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7610 Valid, 3797 Invalid, 8870 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3328 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 14:15:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-11-19 14:15:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 2809. [2021-11-19 14:15:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2144 states have (on average 1.6529850746268657) internal successors, (3544), 2257 states have internal predecessors, (3544), 551 states have call successors, (551), 103 states have call predecessors, (551), 113 states have return successors, (610), 537 states have call predecessors, (610), 546 states have call successors, (610) [2021-11-19 14:15:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4705 transitions. [2021-11-19 14:15:22,004 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4705 transitions. Word has length 91 [2021-11-19 14:15:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:22,005 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 4705 transitions. [2021-11-19 14:15:22,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:15:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4705 transitions. [2021-11-19 14:15:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:15:22,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:22,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:22,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:22,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:22,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 683486121, now seen corresponding path program 1 times [2021-11-19 14:15:22,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:22,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97963833] [2021-11-19 14:15:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:22,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:22,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:22,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:22,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:15:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:22,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:23,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:23,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97963833] [2021-11-19 14:15:23,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97963833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:23,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:23,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:15:23,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886430972] [2021-11-19 14:15:23,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:15:23,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:15:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:23,239 INFO L87 Difference]: Start difference. First operand 2809 states and 4705 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 14:15:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:27,036 INFO L93 Difference]: Finished difference Result 7659 states and 12989 transitions. [2021-11-19 14:15:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:15:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 91 [2021-11-19 14:15:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:27,089 INFO L225 Difference]: With dead ends: 7659 [2021-11-19 14:15:27,090 INFO L226 Difference]: Without dead ends: 5629 [2021-11-19 14:15:27,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:27,104 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 3269 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3342 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:27,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3342 Valid, 1966 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 14:15:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-11-19 14:15:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 5238. [2021-11-19 14:15:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4009 states have (on average 1.652531803442255) internal successors, (6625), 4227 states have internal predecessors, (6625), 997 states have call successors, (997), 187 states have call predecessors, (997), 231 states have return successors, (1211), 972 states have call predecessors, (1211), 992 states have call successors, (1211) [2021-11-19 14:15:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 8833 transitions. [2021-11-19 14:15:27,618 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 8833 transitions. Word has length 91 [2021-11-19 14:15:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:27,618 INFO L470 AbstractCegarLoop]: Abstraction has 5238 states and 8833 transitions. [2021-11-19 14:15:27,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 14:15:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 8833 transitions. [2021-11-19 14:15:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:15:27,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:27,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:27,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:27,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:27,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:27,839 INFO L85 PathProgramCache]: Analyzing trace with hash -211602713, now seen corresponding path program 1 times [2021-11-19 14:15:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:27,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947351746] [2021-11-19 14:15:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:27,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:27,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:27,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:15:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:15:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:29,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:29,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947351746] [2021-11-19 14:15:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947351746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:29,379 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:15:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853120591] [2021-11-19 14:15:29,379 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:15:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:15:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:15:29,382 INFO L87 Difference]: Start difference. First operand 5238 states and 8833 transitions. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 14:15:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:37,860 INFO L93 Difference]: Finished difference Result 14189 states and 24019 transitions. [2021-11-19 14:15:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:15:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 96 [2021-11-19 14:15:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:38,038 INFO L225 Difference]: With dead ends: 14189 [2021-11-19 14:15:38,039 INFO L226 Difference]: Without dead ends: 9630 [2021-11-19 14:15:38,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:15:38,080 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 3196 mSDsluCounter, 2594 mSDsCounter, 0 mSdLazyCounter, 6799 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3270 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 7634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 6799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3270 Valid, 3526 Invalid, 7634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 6799 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 14:15:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-11-19 14:15:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 9336. [2021-11-19 14:15:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 7121 states have (on average 1.6417637972194916) internal successors, (11691), 7503 states have internal predecessors, (11691), 1789 states have call successors, (1789), 345 states have call predecessors, (1789), 425 states have return successors, (2189), 1748 states have call predecessors, (2189), 1784 states have call successors, (2189) [2021-11-19 14:15:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 15669 transitions. [2021-11-19 14:15:39,187 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 15669 transitions. Word has length 96 [2021-11-19 14:15:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:39,188 INFO L470 AbstractCegarLoop]: Abstraction has 9336 states and 15669 transitions. [2021-11-19 14:15:39,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 14:15:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 15669 transitions. [2021-11-19 14:15:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:15:39,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:39,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:39,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:39,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:39,409 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1174449197, now seen corresponding path program 1 times [2021-11-19 14:15:39,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:39,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139679458] [2021-11-19 14:15:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:39,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:39,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:39,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:15:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:39,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:40,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:40,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139679458] [2021-11-19 14:15:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139679458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:40,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:40,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:15:40,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335429659] [2021-11-19 14:15:40,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:40,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:40,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:40,313 INFO L87 Difference]: Start difference. First operand 9336 states and 15669 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:15:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:41,252 INFO L93 Difference]: Finished difference Result 18525 states and 31355 transitions. [2021-11-19 14:15:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-19 14:15:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:41,354 INFO L225 Difference]: With dead ends: 18525 [2021-11-19 14:15:41,354 INFO L226 Difference]: Without dead ends: 9336 [2021-11-19 14:15:41,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:41,425 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 234 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:41,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3050 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9336 states. [2021-11-19 14:15:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9336 to 9336. [2021-11-19 14:15:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 7121 states have (on average 1.6243505125684594) internal successors, (11567), 7503 states have internal predecessors, (11567), 1789 states have call successors, (1789), 345 states have call predecessors, (1789), 425 states have return successors, (2189), 1748 states have call predecessors, (2189), 1784 states have call successors, (2189) [2021-11-19 14:15:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 15545 transitions. [2021-11-19 14:15:42,365 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 15545 transitions. Word has length 103 [2021-11-19 14:15:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:42,367 INFO L470 AbstractCegarLoop]: Abstraction has 9336 states and 15545 transitions. [2021-11-19 14:15:42,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:15:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 15545 transitions. [2021-11-19 14:15:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:15:42,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:42,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:42,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:42,593 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 38356930, now seen corresponding path program 1 times [2021-11-19 14:15:42,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:42,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739411945] [2021-11-19 14:15:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:42,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:42,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:42,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:15:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:15:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:15:43,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:43,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739411945] [2021-11-19 14:15:43,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739411945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:43,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:15:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792199397] [2021-11-19 14:15:43,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:43,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:15:43,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:15:43,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:43,774 INFO L87 Difference]: Start difference. First operand 9336 states and 15545 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:15:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:47,698 INFO L93 Difference]: Finished difference Result 18655 states and 31131 transitions. [2021-11-19 14:15:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:15:47,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 108 [2021-11-19 14:15:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:47,786 INFO L225 Difference]: With dead ends: 18655 [2021-11-19 14:15:47,786 INFO L226 Difference]: Without dead ends: 10211 [2021-11-19 14:15:47,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:15:47,828 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 2839 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2915 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:47,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2915 Valid, 2144 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:15:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-11-19 14:15:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9696. [2021-11-19 14:15:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9696 states, 7393 states have (on average 1.613823887461112) internal successors, (11931), 7795 states have internal predecessors, (11931), 1827 states have call successors, (1827), 377 states have call predecessors, (1827), 475 states have return successors, (2275), 1784 states have call predecessors, (2275), 1822 states have call successors, (2275) [2021-11-19 14:15:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 16033 transitions. [2021-11-19 14:15:48,809 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 16033 transitions. Word has length 108 [2021-11-19 14:15:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:48,809 INFO L470 AbstractCegarLoop]: Abstraction has 9696 states and 16033 transitions. [2021-11-19 14:15:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:15:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 16033 transitions. [2021-11-19 14:15:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:15:48,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:48,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:48,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:15:49,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:49,031 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2023713371, now seen corresponding path program 1 times [2021-11-19 14:15:49,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:49,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876286371] [2021-11-19 14:15:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:49,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:49,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:49,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:15:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:15:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:15:49,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:15:50,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:50,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876286371] [2021-11-19 14:15:50,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876286371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:50,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:50,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:50,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105332705] [2021-11-19 14:15:50,721 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:50,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:50,723 INFO L87 Difference]: Start difference. First operand 9696 states and 16033 transitions. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:15:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:57,653 INFO L93 Difference]: Finished difference Result 25920 states and 43241 transitions. [2021-11-19 14:15:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:15:57,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-11-19 14:15:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:57,785 INFO L225 Difference]: With dead ends: 25920 [2021-11-19 14:15:57,786 INFO L226 Difference]: Without dead ends: 17113 [2021-11-19 14:15:57,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:15:57,828 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 4205 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 4835 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4276 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 6005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 4835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:57,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4276 Valid, 2727 Invalid, 6005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 4835 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:15:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17113 states. [2021-11-19 14:15:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17113 to 17039. [2021-11-19 14:15:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17039 states, 12988 states have (on average 1.6239605789959963) internal successors, (21092), 13655 states have internal predecessors, (21092), 3273 states have call successors, (3273), 681 states have call predecessors, (3273), 777 states have return successors, (3926), 3195 states have call predecessors, (3926), 3268 states have call successors, (3926) [2021-11-19 14:15:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17039 states to 17039 states and 28291 transitions. [2021-11-19 14:15:59,507 INFO L78 Accepts]: Start accepts. Automaton has 17039 states and 28291 transitions. Word has length 113 [2021-11-19 14:15:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:59,508 INFO L470 AbstractCegarLoop]: Abstraction has 17039 states and 28291 transitions. [2021-11-19 14:15:59,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:15:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 17039 states and 28291 transitions. [2021-11-19 14:15:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:15:59,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:59,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:59,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:59,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:59,729 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1889699865, now seen corresponding path program 1 times [2021-11-19 14:15:59,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:59,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217736583] [2021-11-19 14:15:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:59,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:59,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:16:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:16:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:00,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:01,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:01,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217736583] [2021-11-19 14:16:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217736583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:01,420 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:01,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:16:01,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42097950] [2021-11-19 14:16:01,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:01,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:16:01,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:16:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:01,422 INFO L87 Difference]: Start difference. First operand 17039 states and 28291 transitions. Second operand has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 14:16:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:08,705 INFO L93 Difference]: Finished difference Result 43529 states and 73156 transitions. [2021-11-19 14:16:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:16:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) Word has length 113 [2021-11-19 14:16:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:09,084 INFO L225 Difference]: With dead ends: 43529 [2021-11-19 14:16:09,084 INFO L226 Difference]: Without dead ends: 25941 [2021-11-19 14:16:09,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:16:09,175 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 2781 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 4183 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2873 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 4916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 4183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:09,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2873 Valid, 2901 Invalid, 4916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 4183 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 14:16:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25941 states. [2021-11-19 14:16:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25941 to 24649. [2021-11-19 14:16:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24649 states, 18726 states have (on average 1.6188187546726476) internal successors, (30314), 19778 states have internal predecessors, (30314), 4801 states have call successors, (4801), 1014 states have call predecessors, (4801), 1121 states have return successors, (5818), 4581 states have call predecessors, (5818), 4796 states have call successors, (5818) [2021-11-19 14:16:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24649 states to 24649 states and 40933 transitions. [2021-11-19 14:16:11,506 INFO L78 Accepts]: Start accepts. Automaton has 24649 states and 40933 transitions. Word has length 113 [2021-11-19 14:16:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 24649 states and 40933 transitions. [2021-11-19 14:16:11,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 14:16:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 24649 states and 40933 transitions. [2021-11-19 14:16:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:16:11,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:11,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:11,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:16:11,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:11,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1557855975, now seen corresponding path program 1 times [2021-11-19 14:16:11,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:11,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666111732] [2021-11-19 14:16:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:11,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:11,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:11,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:16:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:16:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:12,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:12,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:12,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666111732] [2021-11-19 14:16:12,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666111732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:12,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:12,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-19 14:16:12,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560093767] [2021-11-19 14:16:12,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:16:12,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:16:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:12,981 INFO L87 Difference]: Start difference. First operand 24649 states and 40933 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 14:16:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:15,371 INFO L93 Difference]: Finished difference Result 24958 states and 41493 transitions. [2021-11-19 14:16:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2021-11-19 14:16:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:15,542 INFO L225 Difference]: With dead ends: 24958 [2021-11-19 14:16:15,543 INFO L226 Difference]: Without dead ends: 24943 [2021-11-19 14:16:15,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:15,564 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1028 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:15,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 2114 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:16:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24943 states. [2021-11-19 14:16:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24943 to 24754. [2021-11-19 14:16:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24754 states, 18814 states have (on average 1.617253109386627) internal successors, (30427), 19862 states have internal predecessors, (30427), 4818 states have call successors, (4818), 1014 states have call predecessors, (4818), 1121 states have return successors, (5849), 4602 states have call predecessors, (5849), 4813 states have call successors, (5849) [2021-11-19 14:16:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24754 states to 24754 states and 41094 transitions. [2021-11-19 14:16:17,776 INFO L78 Accepts]: Start accepts. Automaton has 24754 states and 41094 transitions. Word has length 114 [2021-11-19 14:16:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:17,777 INFO L470 AbstractCegarLoop]: Abstraction has 24754 states and 41094 transitions. [2021-11-19 14:16:17,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 14:16:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 24754 states and 41094 transitions. [2021-11-19 14:16:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:16:17,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:17,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:17,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:16:18,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:18,004 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash -362563806, now seen corresponding path program 1 times [2021-11-19 14:16:18,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:18,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627995329] [2021-11-19 14:16:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:18,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:18,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:18,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:16:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:18,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:19,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:19,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627995329] [2021-11-19 14:16:19,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627995329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:19,049 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:19,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:16:19,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922426381] [2021-11-19 14:16:19,050 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:19,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:19,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:19,052 INFO L87 Difference]: Start difference. First operand 24754 states and 41094 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:16:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:20,603 INFO L93 Difference]: Finished difference Result 24769 states and 41112 transitions. [2021-11-19 14:16:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:16:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2021-11-19 14:16:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:20,740 INFO L225 Difference]: With dead ends: 24769 [2021-11-19 14:16:20,741 INFO L226 Difference]: Without dead ends: 24754 [2021-11-19 14:16:20,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:20,755 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 37 mSDsluCounter, 4722 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 5525 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:20,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 5525 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24754 states. [2021-11-19 14:16:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24754 to 24754. [2021-11-19 14:16:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24754 states, 18814 states have (on average 1.6153927926012543) internal successors, (30392), 19862 states have internal predecessors, (30392), 4818 states have call successors, (4818), 1014 states have call predecessors, (4818), 1121 states have return successors, (5849), 4602 states have call predecessors, (5849), 4813 states have call successors, (5849) [2021-11-19 14:16:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24754 states to 24754 states and 41059 transitions. [2021-11-19 14:16:22,956 INFO L78 Accepts]: Start accepts. Automaton has 24754 states and 41059 transitions. Word has length 120 [2021-11-19 14:16:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:22,956 INFO L470 AbstractCegarLoop]: Abstraction has 24754 states and 41059 transitions. [2021-11-19 14:16:22,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:16:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24754 states and 41059 transitions. [2021-11-19 14:16:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:16:22,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:22,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:22,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 14:16:23,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:23,199 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash -361505482, now seen corresponding path program 1 times [2021-11-19 14:16:23,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:23,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655988000] [2021-11-19 14:16:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:23,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:23,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:23,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:16:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:16:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:24,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:24,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:24,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655988000] [2021-11-19 14:16:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655988000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:24,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:24,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:16:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450684742] [2021-11-19 14:16:24,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:24,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:16:24,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:16:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:24,991 INFO L87 Difference]: Start difference. First operand 24754 states and 41059 transitions. Second operand has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:16:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:29,330 INFO L93 Difference]: Finished difference Result 49471 states and 82161 transitions. [2021-11-19 14:16:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) Word has length 131 [2021-11-19 14:16:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:29,480 INFO L225 Difference]: With dead ends: 49471 [2021-11-19 14:16:29,481 INFO L226 Difference]: Without dead ends: 24830 [2021-11-19 14:16:29,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:16:29,558 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1231 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:29,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 2167 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:16:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24830 states. [2021-11-19 14:16:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24830 to 24754. [2021-11-19 14:16:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24754 states, 18814 states have (on average 1.6135324758158818) internal successors, (30357), 19862 states have internal predecessors, (30357), 4818 states have call successors, (4818), 1014 states have call predecessors, (4818), 1121 states have return successors, (5849), 4602 states have call predecessors, (5849), 4813 states have call successors, (5849) [2021-11-19 14:16:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24754 states to 24754 states and 41024 transitions. [2021-11-19 14:16:31,144 INFO L78 Accepts]: Start accepts. Automaton has 24754 states and 41024 transitions. Word has length 131 [2021-11-19 14:16:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:31,144 INFO L470 AbstractCegarLoop]: Abstraction has 24754 states and 41024 transitions. [2021-11-19 14:16:31,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:16:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24754 states and 41024 transitions. [2021-11-19 14:16:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 14:16:31,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:31,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:31,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 14:16:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,365 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1570638314, now seen corresponding path program 1 times [2021-11-19 14:16:31,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:31,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345809626] [2021-11-19 14:16:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:31,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:31,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:31,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:16:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:16:31,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:16:32,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:32,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345809626] [2021-11-19 14:16:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345809626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:32,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 14:16:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696174206] [2021-11-19 14:16:32,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:32,184 INFO L87 Difference]: Start difference. First operand 24754 states and 41024 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 14:16:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:33,745 INFO L93 Difference]: Finished difference Result 25129 states and 41657 transitions. [2021-11-19 14:16:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-11-19 14:16:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:33,873 INFO L225 Difference]: With dead ends: 25129 [2021-11-19 14:16:33,873 INFO L226 Difference]: Without dead ends: 25114 [2021-11-19 14:16:33,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:33,891 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 77 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 3295 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:33,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 3295 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25114 states. [2021-11-19 14:16:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25114 to 24808. [2021-11-19 14:16:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24808 states, 18868 states have (on average 1.610875556497774) internal successors, (30394), 19916 states have internal predecessors, (30394), 4818 states have call successors, (4818), 1014 states have call predecessors, (4818), 1121 states have return successors, (5849), 4602 states have call predecessors, (5849), 4813 states have call successors, (5849) [2021-11-19 14:16:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24808 states to 24808 states and 41061 transitions. [2021-11-19 14:16:35,661 INFO L78 Accepts]: Start accepts. Automaton has 24808 states and 41061 transitions. Word has length 140 [2021-11-19 14:16:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 24808 states and 41061 transitions. [2021-11-19 14:16:35,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 14:16:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24808 states and 41061 transitions. [2021-11-19 14:16:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:16:35,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:35,668 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:35,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,869 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2086367452, now seen corresponding path program 1 times [2021-11-19 14:16:35,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:35,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812241857] [2021-11-19 14:16:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:35,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:35,871 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:35,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:16:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:16:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 14:16:37,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:37,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812241857] [2021-11-19 14:16:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812241857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:37,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012882891] [2021-11-19 14:16:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:37,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:37,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:37,512 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:37,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 14:16:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:16:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:16:38,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:16:38,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012882891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:38,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:16:38,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 8] total 18 [2021-11-19 14:16:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868721221] [2021-11-19 14:16:38,922 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:38,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:38,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:16:38,924 INFO L87 Difference]: Start difference. First operand 24808 states and 41061 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 14:16:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:44,673 INFO L93 Difference]: Finished difference Result 84479 states and 143395 transitions. [2021-11-19 14:16:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 168 [2021-11-19 14:16:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:45,237 INFO L225 Difference]: With dead ends: 84479 [2021-11-19 14:16:45,237 INFO L226 Difference]: Without dead ends: 59759 [2021-11-19 14:16:45,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:16:45,324 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 1785 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:45,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1857 Valid, 1386 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:16:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59759 states. [2021-11-19 14:16:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59759 to 56059. [2021-11-19 14:16:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56059 states, 41628 states have (on average 1.6047612184106852) internal successors, (66803), 44295 states have internal predecessors, (66803), 12034 states have call successors, (12034), 2015 states have call predecessors, (12034), 2396 states have return successors, (16329), 11573 states have call predecessors, (16329), 12029 states have call successors, (16329) [2021-11-19 14:16:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56059 states to 56059 states and 95166 transitions. [2021-11-19 14:16:50,267 INFO L78 Accepts]: Start accepts. Automaton has 56059 states and 95166 transitions. Word has length 168 [2021-11-19 14:16:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:50,268 INFO L470 AbstractCegarLoop]: Abstraction has 56059 states and 95166 transitions. [2021-11-19 14:16:50,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 14:16:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 56059 states and 95166 transitions. [2021-11-19 14:16:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:16:50,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:50,278 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:50,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,679 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:50,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -253301854, now seen corresponding path program 1 times [2021-11-19 14:16:50,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:50,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281489587] [2021-11-19 14:16:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:50,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:50,682 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:50,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:16:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:16:51,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 14:16:52,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:52,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281489587] [2021-11-19 14:16:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281489587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:52,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323323665] [2021-11-19 14:16:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,182 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:52,189 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:52,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637b4695-f1fc-4403-8cc4-a16400328970/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:16:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:16:52,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:16:53,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [323323665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:53,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:16:53,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 8] total 16 [2021-11-19 14:16:53,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243188388] [2021-11-19 14:16:53,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:53,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:16:53,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:16:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:16:53,329 INFO L87 Difference]: Start difference. First operand 56059 states and 95166 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23)