./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF --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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:26:59,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:26:59,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:26:59,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:26:59,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:26:59,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:26:59,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:26:59,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:26:59,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:26:59,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:26:59,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:26:59,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:26:59,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:26:59,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:26:59,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:26:59,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:26:59,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:26:59,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:26:59,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:26:59,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:26:59,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:26:59,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:26:59,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:26:59,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:26:59,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:26:59,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:26:59,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:26:59,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:26:59,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:26:59,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:26:59,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:26:59,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:26:59,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:26:59,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:26:59,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:26:59,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:26:59,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:26:59,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:26:59,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:26:59,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:26:59,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:26:59,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:27:00,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:27:00,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:27:00,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:27:00,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:27:00,014 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:27:00,014 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:27:00,015 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:27:00,015 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:27:00,015 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:27:00,015 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:27:00,025 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:27:00,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:27:00,026 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:27:00,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:27:00,027 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:27:00,027 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:27:00,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:27:00,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:27:00,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:27:00,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:27:00,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:27:00,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:27:00,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:27:00,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:27:00,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:27:00,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:27:00,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:27:00,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:27:00,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:27:00,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:27:00,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:27:00,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:27:00,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:27:00,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:27:00,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:27:00,035 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:27:00,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:27:00,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:27:00,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:27:00,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:27:00,037 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_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-12 22:27:00,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:27:00,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:27:00,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:27:00,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:27:00,423 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:27:00,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-12 22:27:00,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/dda2fd969/90348c17b2f34c1d8c5795da8a66f0df/FLAGd37e643fd [2021-11-12 22:27:01,139 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:27:01,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-12 22:27:01,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/dda2fd969/90348c17b2f34c1d8c5795da8a66f0df/FLAGd37e643fd [2021-11-12 22:27:01,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/dda2fd969/90348c17b2f34c1d8c5795da8a66f0df [2021-11-12 22:27:01,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:27:01,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:27:01,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:01,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:27:01,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:27:01,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:27:01" (1/1) ... [2021-11-12 22:27:01,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d626e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:01, skipping insertion in model container [2021-11-12 22:27:01,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:27:01" (1/1) ... [2021-11-12 22:27:01,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:27:01,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:27:01,929 WARN L228 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_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-12 22:27:02,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:02,050 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) [2021-11-12 22:27:02,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64a30100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02, skipping insertion in model container [2021-11-12 22:27:02,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:02,051 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:27:02,053 INFO L158 Benchmark]: Toolchain (without parser) took 720.35ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 54.3MB in the beginning and 84.7MB in the end (delta: -30.4MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-12 22:27:02,053 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:27:02,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 716.35ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 54.2MB in the beginning and 84.7MB in the end (delta: -30.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-12 22:27:02,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 716.35ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 54.2MB in the beginning and 84.7MB in the end (delta: -30.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 933]: 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_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF --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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:27:04,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:27:04,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:27:04,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:27:04,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:27:04,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:27:04,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:27:04,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:27:04,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:27:04,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:27:04,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:27:04,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:27:04,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:27:04,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:27:04,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:27:04,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:27:04,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:27:04,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:27:04,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:27:04,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:27:04,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:27:04,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:27:04,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:27:04,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:27:04,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:27:04,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:27:04,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:27:04,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:27:04,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:27:04,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:27:04,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:27:04,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:27:04,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:27:04,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:27:04,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:27:04,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:27:04,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:27:04,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:27:04,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:27:04,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:27:04,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:27:04,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:27:04,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:27:04,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:27:04,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:27:04,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:27:04,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:27:04,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:27:04,475 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:27:04,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:27:04,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:27:04,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:27:04,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:27:04,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:27:04,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:27:04,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:27:04,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:27:04,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:27:04,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:27:04,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:27:04,478 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:27:04,479 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:27:04,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:27:04,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:27:04,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:27:04,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:27:04,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:27:04,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:27:04,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:27:04,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:27:04,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:27:04,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:27:04,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:27:04,481 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:27:04,482 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:04,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:27:04,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:27:04,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:27:04,483 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_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-12 22:27:04,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:27:04,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:27:04,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:27:04,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:27:04,871 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:27:04,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-12 22:27:04,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/046ce60d4/2cfe4c513bbe45308fcf69e25ac6d0f1/FLAG3dfda6a09 [2021-11-12 22:27:05,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:27:05,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-12 22:27:05,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/046ce60d4/2cfe4c513bbe45308fcf69e25ac6d0f1/FLAG3dfda6a09 [2021-11-12 22:27:05,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/data/046ce60d4/2cfe4c513bbe45308fcf69e25ac6d0f1 [2021-11-12 22:27:05,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:27:05,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:27:05,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:05,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:27:05,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:27:05,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:27:05" (1/1) ... [2021-11-12 22:27:05,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf97fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:05, skipping insertion in model container [2021-11-12 22:27:05,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:27:05" (1/1) ... [2021-11-12 22:27:05,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:27:06,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:27:06,620 WARN L228 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_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-12 22:27:06,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:06,786 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:27:06,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:27:06,853 WARN L228 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_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-12 22:27:06,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:06,955 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:27:07,028 WARN L228 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_a399826a-9313-4d2b-91b3-378c260df6ba/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-12 22:27:07,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:07,146 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:27:07,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07 WrapperNode [2021-11-12 22:27:07,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:07,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:27:07,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:27:07,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:27:07,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:27:07,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:27:07,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:27:07,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:27:07,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:27:07,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:27:07,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:27:07,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:27:07,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (1/1) ... [2021-11-12 22:27:07,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:27:07,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:07,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:27:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:27:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:27:07,451 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:27:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:27:07,453 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:27:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:27:07,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:27:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:27:07,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:27:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:27:07,454 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:27:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:27:07,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:27:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:27:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:27:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:27:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:27:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:27:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:27:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:27:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:27:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:27:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:27:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:27:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:27:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:27:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:27:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:27:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:27:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:27:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:27:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:27:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:27:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:27:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:27:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:27:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:27:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:27:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:27:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:27:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:27:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:27:07,458 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:27:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:27:07,458 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:27:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:27:07,462 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:27:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:27:07,462 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:27:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:27:07,464 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:27:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:27:07,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:27:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:27:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:27:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:27:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:27:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 22:27:07,468 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 22:27:11,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:27:11,654 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:27:11,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:27:11 BoogieIcfgContainer [2021-11-12 22:27:11,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:27:11,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:27:11,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:27:11,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:27:11,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:27:05" (1/3) ... [2021-11-12 22:27:11,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec5fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:27:11, skipping insertion in model container [2021-11-12 22:27:11,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:07" (2/3) ... [2021-11-12 22:27:11,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec5fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:27:11, skipping insertion in model container [2021-11-12 22:27:11,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:27:11" (3/3) ... [2021-11-12 22:27:11,669 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2021-11-12 22:27:11,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:27:11,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:27:11,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:27:11,778 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 [2021-11-12 22:27:11,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:27:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 605 states, 471 states have (on average 1.6772823779193207) internal successors, (790), 494 states have internal predecessors, (790), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:27:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 22:27:11,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:11,846 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] [2021-11-12 22:27:11,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -782155594, now seen corresponding path program 1 times [2021-11-12 22:27:11,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:11,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737255054] [2021-11-12 22:27:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:11,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:11,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:11,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:27:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:12,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:27:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:12,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:12,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:12,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737255054] [2021-11-12 22:27:12,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737255054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:12,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:12,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:27:12,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544588863] [2021-11-12 22:27:12,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:12,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:27:12,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:27:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:27:12,987 INFO L87 Difference]: Start difference. First operand has 605 states, 471 states have (on average 1.6772823779193207) internal successors, (790), 494 states have internal predecessors, (790), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:27:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:13,084 INFO L93 Difference]: Finished difference Result 626 states and 1030 transitions. [2021-11-12 22:27:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:27:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-12 22:27:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:13,117 INFO L225 Difference]: With dead ends: 626 [2021-11-12 22:27:13,117 INFO L226 Difference]: Without dead ends: 597 [2021-11-12 22:27:13,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:27:13,131 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:13,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 11.43ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:27:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-12 22:27:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-12 22:27:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.675268817204301) internal successors, (779), 486 states have internal predecessors, (779), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 984 transitions. [2021-11-12 22:27:13,298 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 984 transitions. Word has length 60 [2021-11-12 22:27:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:13,301 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 984 transitions. [2021-11-12 22:27:13,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:27:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 984 transitions. [2021-11-12 22:27:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:27:13,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:13,315 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] [2021-11-12 22:27:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:13,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:13,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash -20488219, now seen corresponding path program 1 times [2021-11-12 22:27:13,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:13,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866662474] [2021-11-12 22:27:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:13,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:13,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:27:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:27:14,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:14,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:14,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:14,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866662474] [2021-11-12 22:27:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866662474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:14,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:14,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:27:14,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600684753] [2021-11-12 22:27:14,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:14,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:27:14,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:27:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:27:14,527 INFO L87 Difference]: Start difference. First operand 597 states and 984 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:27:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:14,707 INFO L93 Difference]: Finished difference Result 1178 states and 1946 transitions. [2021-11-12 22:27:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:27:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-12 22:27:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:14,717 INFO L225 Difference]: With dead ends: 1178 [2021-11-12 22:27:14,718 INFO L226 Difference]: Without dead ends: 597 [2021-11-12 22:27:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:14,729 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 15 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.94ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:14,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3877 Invalid, 36 Unknown, 0 Unchecked, 30.94ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 39.90ms Time] [2021-11-12 22:27:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-12 22:27:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-12 22:27:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.6623655913978495) internal successors, (773), 486 states have internal predecessors, (773), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 978 transitions. [2021-11-12 22:27:14,783 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 978 transitions. Word has length 62 [2021-11-12 22:27:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:14,784 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 978 transitions. [2021-11-12 22:27:14,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:27:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 978 transitions. [2021-11-12 22:27:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:27:14,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:14,789 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] [2021-11-12 22:27:14,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:15,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash 34631396, now seen corresponding path program 1 times [2021-11-12 22:27:15,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:15,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969212728] [2021-11-12 22:27:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:15,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:15,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:15,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:27:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:15,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:16,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969212728] [2021-11-12 22:27:16,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969212728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:16,063 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:27:16,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349695545] [2021-11-12 22:27:16,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:16,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:27:16,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:27:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:27:16,066 INFO L87 Difference]: Start difference. First operand 597 states and 978 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:27:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:16,298 INFO L93 Difference]: Finished difference Result 1136 states and 1863 transitions. [2021-11-12 22:27:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:27:16,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 22:27:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:16,305 INFO L225 Difference]: With dead ends: 1136 [2021-11-12 22:27:16,306 INFO L226 Difference]: Without dead ends: 591 [2021-11-12 22:27:16,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:27:16,310 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 193 mSDsluCounter, 6659 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 7624 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:16,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 7624 Invalid, 93 Unknown, 0 Unchecked, 18.56ms Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 110.05ms Time] [2021-11-12 22:27:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-12 22:27:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-12 22:27:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 459 states have (on average 1.6557734204793029) internal successors, (760), 480 states have internal predecessors, (760), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 965 transitions. [2021-11-12 22:27:16,340 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 965 transitions. Word has length 67 [2021-11-12 22:27:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:16,340 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 965 transitions. [2021-11-12 22:27:16,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:27:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 965 transitions. [2021-11-12 22:27:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 22:27:16,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:16,343 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] [2021-11-12 22:27:16,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:16,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:16,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1238642586, now seen corresponding path program 1 times [2021-11-12 22:27:16,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:16,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503904635] [2021-11-12 22:27:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:16,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:16,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:16,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:16,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:27:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:17,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:27:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:17,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:17,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503904635] [2021-11-12 22:27:17,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503904635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:17,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:17,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:27:17,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539009794] [2021-11-12 22:27:17,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:17,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:27:17,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:17,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:27:17,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:27:17,437 INFO L87 Difference]: Start difference. First operand 591 states and 965 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:27:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:17,673 INFO L93 Difference]: Finished difference Result 1139 states and 1864 transitions. [2021-11-12 22:27:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:27:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-12 22:27:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:17,680 INFO L225 Difference]: With dead ends: 1139 [2021-11-12 22:27:17,680 INFO L226 Difference]: Without dead ends: 591 [2021-11-12 22:27:17,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:17,693 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 121 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:17,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 2735 Invalid, 124 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 154.37ms Time] [2021-11-12 22:27:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-12 22:27:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-12 22:27:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 459 states have (on average 1.6034858387799564) internal successors, (736), 480 states have internal predecessors, (736), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 941 transitions. [2021-11-12 22:27:17,730 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 941 transitions. Word has length 68 [2021-11-12 22:27:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:17,730 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 941 transitions. [2021-11-12 22:27:17,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:27:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 941 transitions. [2021-11-12 22:27:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:27:17,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:17,732 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] [2021-11-12 22:27:17,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:17,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1086078261, now seen corresponding path program 1 times [2021-11-12 22:27:17,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:17,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791850276] [2021-11-12 22:27:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:17,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:17,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:17,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:27:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:18,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:18,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:19,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:19,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791850276] [2021-11-12 22:27:19,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791850276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:19,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:19,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:27:19,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011492032] [2021-11-12 22:27:19,004 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:19,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:27:19,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:27:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:19,007 INFO L87 Difference]: Start difference. First operand 591 states and 941 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:27:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:19,151 INFO L93 Difference]: Finished difference Result 1130 states and 1826 transitions. [2021-11-12 22:27:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:27:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 22:27:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:19,158 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 22:27:19,159 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:27:19,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:19,163 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 117 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5511 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:19,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5511 Invalid, 57 Unknown, 0 Unchecked, 11.15ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 79.70ms Time] [2021-11-12 22:27:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:27:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 22:27:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 438 states have (on average 1.6232876712328768) internal successors, (711), 459 states have internal predecessors, (711), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 916 transitions. [2021-11-12 22:27:19,190 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 916 transitions. Word has length 70 [2021-11-12 22:27:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:19,190 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 916 transitions. [2021-11-12 22:27:19,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:27:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 916 transitions. [2021-11-12 22:27:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 22:27:19,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:19,192 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] [2021-11-12 22:27:19,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:19,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:19,406 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1219091537, now seen corresponding path program 1 times [2021-11-12 22:27:19,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:19,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613355233] [2021-11-12 22:27:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:19,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:19,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:19,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:27:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:27:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:20,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:20,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:20,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613355233] [2021-11-12 22:27:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613355233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:20,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:20,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:27:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491902955] [2021-11-12 22:27:20,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:20,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:27:20,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:27:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:27:20,573 INFO L87 Difference]: Start difference. First operand 570 states and 916 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:27:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:20,820 INFO L93 Difference]: Finished difference Result 1103 states and 1790 transitions. [2021-11-12 22:27:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:27:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 22:27:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:20,826 INFO L225 Difference]: With dead ends: 1103 [2021-11-12 22:27:20,826 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:27:20,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:27:20,831 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 44 mSDsluCounter, 8083 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8984 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:20,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8984 Invalid, 128 Unknown, 0 Unchecked, 17.79ms Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 148.54ms Time] [2021-11-12 22:27:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:27:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 22:27:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 438 states have (on average 1.6210045662100456) internal successors, (710), 459 states have internal predecessors, (710), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 22:27:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 915 transitions. [2021-11-12 22:27:20,867 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 915 transitions. Word has length 73 [2021-11-12 22:27:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:20,867 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 915 transitions. [2021-11-12 22:27:20,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:27:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 915 transitions. [2021-11-12 22:27:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 22:27:20,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:20,869 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] [2021-11-12 22:27:20,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:21,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:21,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2003884773, now seen corresponding path program 1 times [2021-11-12 22:27:21,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:21,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328293144] [2021-11-12 22:27:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:21,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:21,090 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:21,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:27:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:22,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:22,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:22,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328293144] [2021-11-12 22:27:22,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328293144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:22,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:22,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 22:27:22,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820184274] [2021-11-12 22:27:22,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:22,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:27:22,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:27:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:27:22,632 INFO L87 Difference]: Start difference. First operand 570 states and 915 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 22:27:24,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:26,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:28,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:38,078 INFO L93 Difference]: Finished difference Result 2870 states and 4742 transitions. [2021-11-12 22:27:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:27:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2021-11-12 22:27:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:38,103 INFO L225 Difference]: With dead ends: 2870 [2021-11-12 22:27:38,103 INFO L226 Difference]: Without dead ends: 2345 [2021-11-12 22:27:38,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:27:38,109 INFO L933 BasicCegarLoop]: 1629 mSDtfsCounter, 6061 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 4536 mSolverCounterSat, 1681 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13671.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6258 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 6220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.53ms SdHoareTripleChecker+Time, 1681 IncrementalHoareTripleChecker+Valid, 4536 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14955.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:38,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6258 Valid, 3284 Invalid, 6220 Unknown, 0 Unchecked, 60.53ms Time], IncrementalHoareTripleChecker [1681 Valid, 4536 Invalid, 3 Unknown, 0 Unchecked, 14955.48ms Time] [2021-11-12 22:27:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-11-12 22:27:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2157. [2021-11-12 22:27:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 1648 states have (on average 1.6510922330097086) internal successors, (2721), 1713 states have internal predecessors, (2721), 419 states have call successors, (419), 86 states have call predecessors, (419), 89 states have return successors, (427), 384 states have call predecessors, (427), 414 states have call successors, (427) [2021-11-12 22:27:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3567 transitions. [2021-11-12 22:27:38,249 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3567 transitions. Word has length 74 [2021-11-12 22:27:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:38,250 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 3567 transitions. [2021-11-12 22:27:38,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 22:27:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3567 transitions. [2021-11-12 22:27:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:27:38,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:38,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:38,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:38,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:38,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1629547813, now seen corresponding path program 1 times [2021-11-12 22:27:38,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:38,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726261989] [2021-11-12 22:27:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:38,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:38,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:38,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:27:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:27:39,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:27:40,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:40,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726261989] [2021-11-12 22:27:40,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726261989] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:40,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:40,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:27:40,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511135661] [2021-11-12 22:27:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:40,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:27:40,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:27:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:40,053 INFO L87 Difference]: Start difference. First operand 2157 states and 3567 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:27:42,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:44,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:45,234 INFO L93 Difference]: Finished difference Result 4285 states and 7218 transitions. [2021-11-12 22:27:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:27:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-11-12 22:27:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:45,259 INFO L225 Difference]: With dead ends: 4285 [2021-11-12 22:27:45,259 INFO L226 Difference]: Without dead ends: 2173 [2021-11-12 22:27:45,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:27:45,279 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 857 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4847.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.85ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5014.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:45,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2274 Invalid, 473 Unknown, 0 Unchecked, 8.85ms Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 5014.39ms Time] [2021-11-12 22:27:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-11-12 22:27:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 2173. [2021-11-12 22:27:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 1660 states have (on average 1.6463855421686746) internal successors, (2733), 1725 states have internal predecessors, (2733), 419 states have call successors, (419), 90 states have call predecessors, (419), 93 states have return successors, (431), 384 states have call predecessors, (431), 414 states have call successors, (431) [2021-11-12 22:27:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3583 transitions. [2021-11-12 22:27:45,441 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3583 transitions. Word has length 129 [2021-11-12 22:27:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:45,441 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 3583 transitions. [2021-11-12 22:27:45,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:27:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3583 transitions. [2021-11-12 22:27:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:27:45,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:45,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:45,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:45,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:45,663 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -217516115, now seen corresponding path program 1 times [2021-11-12 22:27:45,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:45,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413148401] [2021-11-12 22:27:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:45,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:45,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:45,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:27:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:27:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:27:46,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:27:47,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:47,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413148401] [2021-11-12 22:27:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413148401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:47,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:47,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:27:47,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742410280] [2021-11-12 22:27:47,217 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:27:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:27:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:27:47,219 INFO L87 Difference]: Start difference. First operand 2173 states and 3583 transitions. Second operand has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-12 22:27:49,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:51,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:59,354 INFO L93 Difference]: Finished difference Result 5763 states and 9496 transitions. [2021-11-12 22:27:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:27:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 130 [2021-11-12 22:27:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:59,397 INFO L225 Difference]: With dead ends: 5763 [2021-11-12 22:27:59,397 INFO L226 Difference]: Without dead ends: 3635 [2021-11-12 22:27:59,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:27:59,416 INFO L933 BasicCegarLoop]: 1876 mSDtfsCounter, 3481 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 6655 mSolverCounterSat, 1278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10456.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3574 SdHoareTripleChecker+Valid, 4863 SdHoareTripleChecker+Invalid, 7935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.77ms SdHoareTripleChecker+Time, 1278 IncrementalHoareTripleChecker+Valid, 6655 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11526.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:59,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3574 Valid, 4863 Invalid, 7935 Unknown, 0 Unchecked, 48.77ms Time], IncrementalHoareTripleChecker [1278 Valid, 6655 Invalid, 2 Unknown, 0 Unchecked, 11526.29ms Time] [2021-11-12 22:27:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-11-12 22:27:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3163. [2021-11-12 22:27:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 2356 states have (on average 1.602716468590832) internal successors, (3776), 2447 states have internal predecessors, (3776), 657 states have call successors, (657), 133 states have call predecessors, (657), 149 states have return successors, (699), 615 states have call predecessors, (699), 652 states have call successors, (699) [2021-11-12 22:27:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 5132 transitions. [2021-11-12 22:27:59,711 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 5132 transitions. Word has length 130 [2021-11-12 22:27:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:59,713 INFO L470 AbstractCegarLoop]: Abstraction has 3163 states and 5132 transitions. [2021-11-12 22:27:59,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-12 22:27:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 5132 transitions. [2021-11-12 22:27:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:27:59,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:59,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:59,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:59,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:59,953 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash 203899311, now seen corresponding path program 1 times [2021-11-12 22:27:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:59,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106438285] [2021-11-12 22:27:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:59,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:59,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:59,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:59,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:28:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:00,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:01,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:01,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106438285] [2021-11-12 22:28:01,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106438285] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:01,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:28:01,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:28:01,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098348177] [2021-11-12 22:28:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:01,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:01,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:01,392 INFO L87 Difference]: Start difference. First operand 3163 states and 5132 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:03,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:05,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:06,337 INFO L93 Difference]: Finished difference Result 6331 states and 10462 transitions. [2021-11-12 22:28:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-12 22:28:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:06,366 INFO L225 Difference]: With dead ends: 6331 [2021-11-12 22:28:06,367 INFO L226 Difference]: Without dead ends: 3213 [2021-11-12 22:28:06,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:28:06,393 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 855 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4645.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.61ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4780.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:06,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 2275 Invalid, 475 Unknown, 0 Unchecked, 5.61ms Time], IncrementalHoareTripleChecker [14 Valid, 459 Invalid, 2 Unknown, 0 Unchecked, 4780.40ms Time] [2021-11-12 22:28:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-11-12 22:28:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3213. [2021-11-12 22:28:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2396 states have (on average 1.5926544240400669) internal successors, (3816), 2487 states have internal predecessors, (3816), 657 states have call successors, (657), 143 states have call predecessors, (657), 159 states have return successors, (705), 615 states have call predecessors, (705), 652 states have call successors, (705) [2021-11-12 22:28:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 5178 transitions. [2021-11-12 22:28:06,650 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 5178 transitions. Word has length 131 [2021-11-12 22:28:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 5178 transitions. [2021-11-12 22:28:06,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 5178 transitions. [2021-11-12 22:28:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:28:06,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:06,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:06,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:06,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:06,874 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1750671259, now seen corresponding path program 1 times [2021-11-12 22:28:06,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:06,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298492730] [2021-11-12 22:28:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:06,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:06,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:06,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:28:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:08,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298492730] [2021-11-12 22:28:08,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298492730] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:08,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:28:08,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:28:08,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591652468] [2021-11-12 22:28:08,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:08,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:08,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:08,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:08,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:08,191 INFO L87 Difference]: Start difference. First operand 3213 states and 5178 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:10,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:12,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:13,127 INFO L93 Difference]: Finished difference Result 6441 states and 10554 transitions. [2021-11-12 22:28:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-12 22:28:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:13,155 INFO L225 Difference]: With dead ends: 6441 [2021-11-12 22:28:13,156 INFO L226 Difference]: Without dead ends: 3273 [2021-11-12 22:28:13,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:28:13,178 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 855 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4636.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.74ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4755.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:13,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 2275 Invalid, 474 Unknown, 0 Unchecked, 5.74ms Time], IncrementalHoareTripleChecker [12 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 4755.93ms Time] [2021-11-12 22:28:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-12 22:28:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3273. [2021-11-12 22:28:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 2446 states have (on average 1.580539656582175) internal successors, (3866), 2537 states have internal predecessors, (3866), 657 states have call successors, (657), 153 states have call predecessors, (657), 169 states have return successors, (711), 615 states have call predecessors, (711), 652 states have call successors, (711) [2021-11-12 22:28:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 5234 transitions. [2021-11-12 22:28:13,399 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 5234 transitions. Word has length 133 [2021-11-12 22:28:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:13,400 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 5234 transitions. [2021-11-12 22:28:13,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 5234 transitions. [2021-11-12 22:28:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:28:13,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:13,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:13,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:13,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:13,626 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 426652647, now seen corresponding path program 1 times [2021-11-12 22:28:13,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:13,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516369715] [2021-11-12 22:28:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:13,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:13,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:28:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:14,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:28:15,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:15,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516369715] [2021-11-12 22:28:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516369715] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:15,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:28:15,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:28:15,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236789082] [2021-11-12 22:28:15,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:15,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:15,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:15,062 INFO L87 Difference]: Start difference. First operand 3273 states and 5234 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:17,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:19,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:20,192 INFO L93 Difference]: Finished difference Result 6571 states and 10666 transitions. [2021-11-12 22:28:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-11-12 22:28:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:20,215 INFO L225 Difference]: With dead ends: 6571 [2021-11-12 22:28:20,215 INFO L226 Difference]: Without dead ends: 3343 [2021-11-12 22:28:20,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:28:20,225 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 847 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4811.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4931.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:20,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 2275 Invalid, 473 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [10 Valid, 461 Invalid, 2 Unknown, 0 Unchecked, 4931.73ms Time] [2021-11-12 22:28:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-12 22:28:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3343. [2021-11-12 22:28:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 2506 states have (on average 1.5666400638467677) internal successors, (3926), 2597 states have internal predecessors, (3926), 657 states have call successors, (657), 163 states have call predecessors, (657), 179 states have return successors, (717), 615 states have call predecessors, (717), 652 states have call successors, (717) [2021-11-12 22:28:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 5300 transitions. [2021-11-12 22:28:20,483 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 5300 transitions. Word has length 135 [2021-11-12 22:28:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:20,484 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 5300 transitions. [2021-11-12 22:28:20,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 5300 transitions. [2021-11-12 22:28:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:28:20,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:20,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:20,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:20,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:20,706 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1873600933, now seen corresponding path program 1 times [2021-11-12 22:28:20,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:20,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471313342] [2021-11-12 22:28:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:20,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:20,707 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:20,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:28:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:28:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:28:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:23,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:23,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471313342] [2021-11-12 22:28:23,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471313342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:23,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911377448] [2021-11-12 22:28:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:23,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:23,039 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:23,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:28:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:28:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:28:23,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:23,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [911377448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:23,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:23,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:28:23,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864231397] [2021-11-12 22:28:23,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:23,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:28:23,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:28:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:28:23,956 INFO L87 Difference]: Start difference. First operand 3343 states and 5300 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:25,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:26,232 INFO L93 Difference]: Finished difference Result 9905 states and 15896 transitions. [2021-11-12 22:28:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:28:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-12 22:28:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:26,270 INFO L225 Difference]: With dead ends: 9905 [2021-11-12 22:28:26,270 INFO L226 Difference]: Without dead ends: 6609 [2021-11-12 22:28:26,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:28:26,280 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 861 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2027.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2039.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:26,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 2563 Invalid, 9 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2039.61ms Time] [2021-11-12 22:28:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6609 states. [2021-11-12 22:28:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6609 to 6564. [2021-11-12 22:28:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6564 states, 4929 states have (on average 1.5696895922093732) internal successors, (7737), 5102 states have internal predecessors, (7737), 1280 states have call successors, (1280), 315 states have call predecessors, (1280), 354 states have return successors, (1464), 1212 states have call predecessors, (1464), 1275 states have call successors, (1464) [2021-11-12 22:28:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6564 states to 6564 states and 10481 transitions. [2021-11-12 22:28:26,735 INFO L78 Accepts]: Start accepts. Automaton has 6564 states and 10481 transitions. Word has length 137 [2021-11-12 22:28:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 6564 states and 10481 transitions. [2021-11-12 22:28:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:28:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6564 states and 10481 transitions. [2021-11-12 22:28:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:28:26,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:26,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:26,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-12 22:28:26,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:27,149 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1035162969, now seen corresponding path program 1 times [2021-11-12 22:28:27,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:27,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334468750] [2021-11-12 22:28:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:27,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:27,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:28:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:28:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:28:28,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:29,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334468750] [2021-11-12 22:28:29,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334468750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376059042] [2021-11-12 22:28:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:29,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:29,271 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:29,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:28:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:30,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376059042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:30,554 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:30,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:28:30,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762461914] [2021-11-12 22:28:30,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:30,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:30,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:28:30,556 INFO L87 Difference]: Start difference. First operand 6564 states and 10481 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:28:32,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:35,056 INFO L93 Difference]: Finished difference Result 17936 states and 29171 transitions. [2021-11-12 22:28:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:28:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 137 [2021-11-12 22:28:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:35,141 INFO L225 Difference]: With dead ends: 17936 [2021-11-12 22:28:35,141 INFO L226 Difference]: Without dead ends: 11417 [2021-11-12 22:28:35,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:28:35,173 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 2616 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 648 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3669.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.26ms SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3983.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:35,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 1512 Invalid, 1611 Unknown, 0 Unchecked, 12.26ms Time], IncrementalHoareTripleChecker [648 Valid, 962 Invalid, 1 Unknown, 0 Unchecked, 3983.73ms Time] [2021-11-12 22:28:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11417 states. [2021-11-12 22:28:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11417 to 10955. [2021-11-12 22:28:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 8115 states have (on average 1.5643869377695625) internal successors, (12695), 8454 states have internal predecessors, (12695), 2250 states have call successors, (2250), 496 states have call predecessors, (2250), 589 states have return successors, (2775), 2166 states have call predecessors, (2775), 2245 states have call successors, (2775) [2021-11-12 22:28:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 17720 transitions. [2021-11-12 22:28:35,988 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 17720 transitions. Word has length 137 [2021-11-12 22:28:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:35,989 INFO L470 AbstractCegarLoop]: Abstraction has 10955 states and 17720 transitions. [2021-11-12 22:28:35,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:28:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 17720 transitions. [2021-11-12 22:28:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 22:28:35,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:35,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:36,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:36,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-12 22:28:36,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:36,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2025573018, now seen corresponding path program 1 times [2021-11-12 22:28:36,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:36,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407670842] [2021-11-12 22:28:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:36,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:36,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:36,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:28:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:28:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:28:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:38,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:38,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407670842] [2021-11-12 22:28:38,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407670842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:38,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101073410] [2021-11-12 22:28:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:38,518 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:38,519 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:28:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:39,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:39,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101073410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:39,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:39,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:28:39,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124767535] [2021-11-12 22:28:39,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:28:39,976 INFO L87 Difference]: Start difference. First operand 10955 states and 17720 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:28:42,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:44,850 INFO L93 Difference]: Finished difference Result 32553 states and 54412 transitions. [2021-11-12 22:28:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:28:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 138 [2021-11-12 22:28:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:44,992 INFO L225 Difference]: With dead ends: 32553 [2021-11-12 22:28:44,993 INFO L226 Difference]: Without dead ends: 21643 [2021-11-12 22:28:45,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:28:45,051 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 2620 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 654 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3649.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.12ms SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3956.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:45,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2703 Valid, 1455 Invalid, 1615 Unknown, 0 Unchecked, 12.12ms Time], IncrementalHoareTripleChecker [654 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 3956.35ms Time] [2021-11-12 22:28:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21643 states. [2021-11-12 22:28:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21643 to 20672. [2021-11-12 22:28:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20672 states, 15036 states have (on average 1.557927640329875) internal successors, (23425), 15777 states have internal predecessors, (23425), 4536 states have call successors, (4536), 858 states have call predecessors, (4536), 1099 states have return successors, (6337), 4444 states have call predecessors, (6337), 4531 states have call successors, (6337) [2021-11-12 22:28:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20672 states to 20672 states and 34298 transitions. [2021-11-12 22:28:46,778 INFO L78 Accepts]: Start accepts. Automaton has 20672 states and 34298 transitions. Word has length 138 [2021-11-12 22:28:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:46,778 INFO L470 AbstractCegarLoop]: Abstraction has 20672 states and 34298 transitions. [2021-11-12 22:28:46,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:28:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 20672 states and 34298 transitions. [2021-11-12 22:28:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:28:46,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:46,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:46,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:47,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:47,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:47,197 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1631457737, now seen corresponding path program 1 times [2021-11-12 22:28:47,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:47,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081784613] [2021-11-12 22:28:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:47,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:47,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:47,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:28:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:28:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:28:48,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:49,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:49,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081784613] [2021-11-12 22:28:49,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081784613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:49,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [384778977] [2021-11-12 22:28:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:49,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:49,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:28:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:28:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [384778977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:50,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:50,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:28:50,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173686026] [2021-11-12 22:28:50,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:28:50,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:28:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:28:50,557 INFO L87 Difference]: Start difference. First operand 20672 states and 34298 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:28:52,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:56,712 INFO L93 Difference]: Finished difference Result 65310 states and 114467 transitions. [2021-11-12 22:28:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:28:56,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-12 22:28:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:57,020 INFO L225 Difference]: With dead ends: 65310 [2021-11-12 22:28:57,020 INFO L226 Difference]: Without dead ends: 44683 [2021-11-12 22:28:57,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:28:57,137 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 2049 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 492 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3727.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.76ms SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4010.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:57,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 1438 Invalid, 1469 Unknown, 0 Unchecked, 9.76ms Time], IncrementalHoareTripleChecker [492 Valid, 976 Invalid, 1 Unknown, 0 Unchecked, 4010.11ms Time] [2021-11-12 22:28:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44683 states. [2021-11-12 22:29:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44683 to 42689. [2021-11-12 22:29:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42689 states, 30401 states have (on average 1.5504424196572482) internal successors, (47135), 32128 states have internal predecessors, (47135), 10064 states have call successors, (10064), 1582 states have call predecessors, (10064), 2223 states have return successors, (16571), 10028 states have call predecessors, (16571), 10059 states have call successors, (16571) [2021-11-12 22:29:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42689 states to 42689 states and 73770 transitions. [2021-11-12 22:29:00,554 INFO L78 Accepts]: Start accepts. Automaton has 42689 states and 73770 transitions. Word has length 139 [2021-11-12 22:29:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:00,555 INFO L470 AbstractCegarLoop]: Abstraction has 42689 states and 73770 transitions. [2021-11-12 22:29:00,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:29:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42689 states and 73770 transitions. [2021-11-12 22:29:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:29:00,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:00,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:00,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:00,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:00,984 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash -964701944, now seen corresponding path program 1 times [2021-11-12 22:29:00,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:00,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878202872] [2021-11-12 22:29:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:00,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:00,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:00,986 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:00,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:29:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:29:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:29:01,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:29:02,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878202872] [2021-11-12 22:29:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878202872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075062771] [2021-11-12 22:29:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:02,953 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:02,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:02,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:29:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:29:03,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:29:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075062771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:04,459 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:04,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:29:04,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900334663] [2021-11-12 22:29:04,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:04,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:04,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:04,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:29:04,462 INFO L87 Difference]: Start difference. First operand 42689 states and 73770 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:29:06,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:14,287 INFO L93 Difference]: Finished difference Result 140491 states and 265426 transitions. [2021-11-12 22:29:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 140 [2021-11-12 22:29:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:15,195 INFO L225 Difference]: With dead ends: 140491 [2021-11-12 22:29:15,195 INFO L226 Difference]: Without dead ends: 97847 [2021-11-12 22:29:15,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:29:15,404 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 1979 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 480 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3729.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.02ms SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4030.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:15,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2060 Valid, 1578 Invalid, 1498 Unknown, 0 Unchecked, 11.02ms Time], IncrementalHoareTripleChecker [480 Valid, 1017 Invalid, 1 Unknown, 0 Unchecked, 4030.59ms Time] [2021-11-12 22:29:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97847 states. [2021-11-12 22:29:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97847 to 93970. [2021-11-12 22:29:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93970 states, 65442 states have (on average 1.5422053115736072) internal successors, (100925), 69619 states have internal predecessors, (100925), 23776 states have call successors, (23776), 3030 states have call predecessors, (23776), 4751 states have return successors, (47717), 24068 states have call predecessors, (47717), 23771 states have call successors, (47717) [2021-11-12 22:29:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93970 states to 93970 states and 172418 transitions. [2021-11-12 22:29:23,175 INFO L78 Accepts]: Start accepts. Automaton has 93970 states and 172418 transitions. Word has length 140 [2021-11-12 22:29:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:23,176 INFO L470 AbstractCegarLoop]: Abstraction has 93970 states and 172418 transitions. [2021-11-12 22:29:23,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:29:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 93970 states and 172418 transitions. [2021-11-12 22:29:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:29:23,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:23,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:23,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:23,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-12 22:29:23,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:23,604 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash 158730475, now seen corresponding path program 1 times [2021-11-12 22:29:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:23,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689794237] [2021-11-12 22:29:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:23,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:23,607 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:29:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:29:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:29:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:29:25,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:25,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689794237] [2021-11-12 22:29:25,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689794237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:25,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955130253] [2021-11-12 22:29:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:25,914 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:25,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:25,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a399826a-9313-4d2b-91b3-378c260df6ba/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 22:29:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:29:26,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:29:27,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [955130253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:27,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:27,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:29:27,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480501697] [2021-11-12 22:29:27,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:27,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:29:27,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:29:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:29:27,308 INFO L87 Difference]: Start difference. First operand 93970 states and 172418 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:29:29,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []