./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:19:12,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:19:12,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:19:12,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:19:12,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:19:12,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:19:12,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:19:12,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:19:12,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:19:12,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:19:12,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:19:12,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:19:12,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:19:12,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:19:12,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:19:12,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:19:12,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:19:12,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:19:12,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:19:12,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:19:12,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:19:12,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:19:12,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:19:12,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:19:12,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:19:12,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:19:12,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:19:12,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:19:12,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:19:12,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:19:12,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:19:12,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:19:12,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:19:12,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:19:12,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:19:12,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:19:12,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:19:12,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:19:12,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:19:12,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:19:12,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:19:12,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:19:13,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:19:13,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:19:13,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:19:13,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:19:13,033 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:19:13,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:19:13,034 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:19:13,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:19:13,034 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:19:13,034 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:19:13,036 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:19:13,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:19:13,036 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:19:13,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:19:13,037 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:19:13,037 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:19:13,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:19:13,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:19:13,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:19:13,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:19:13,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:19:13,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:19:13,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:19:13,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:19:13,040 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:19:13,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:19:13,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:19:13,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:19:13,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:19:13,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:19:13,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:19:13,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:19:13,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:19:13,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:19:13,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:19:13,044 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:19:13,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:19:13,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:19:13,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:19:13,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:19:13,045 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2021-11-12 22:19:13,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:19:13,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:19:13,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:19:13,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:19:13,340 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:19:13,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-12 22:19:13,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/a28a1fddc/54e1f96a86de4ace8dca1f27e0a9eee2/FLAG42aca2775 [2021-11-12 22:19:14,041 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:19:14,042 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-12 22:19:14,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/a28a1fddc/54e1f96a86de4ace8dca1f27e0a9eee2/FLAG42aca2775 [2021-11-12 22:19:14,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/a28a1fddc/54e1f96a86de4ace8dca1f27e0a9eee2 [2021-11-12 22:19:14,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:19:14,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:19:14,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:14,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:19:14,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:19:14,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:14" (1/1) ... [2021-11-12 22:19:14,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561e6386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:14, skipping insertion in model container [2021-11-12 22:19:14,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:14" (1/1) ... [2021-11-12 22:19:14,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:19:14,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:19:14,543 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-12 22:19:14,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:14,913 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 22:19:14,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f3a50d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:14, skipping insertion in model container [2021-11-12 22:19:14,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:14,914 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:19:14,916 INFO L158 Benchmark]: Toolchain (without parser) took 645.15ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 46.7MB in the beginning and 76.2MB in the end (delta: -29.6MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-12 22:19:14,918 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 49.8MB in the beginning and 49.7MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:19:14,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 641.47ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 46.4MB in the beginning and 76.2MB in the end (delta: -29.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-12 22:19:14,922 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 49.8MB in the beginning and 49.7MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 641.47ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 46.4MB in the beginning and 76.2MB in the end (delta: -29.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 188]: 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:19:17,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:19:17,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:19:17,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:19:17,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:19:17,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:19:17,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:19:17,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:19:17,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:19:17,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:19:17,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:19:17,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:19:17,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:19:17,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:19:17,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:19:17,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:19:17,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:19:17,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:19:17,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:19:17,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:19:17,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:19:17,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:19:17,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:19:17,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:19:17,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:19:17,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:19:17,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:19:17,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:19:17,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:19:17,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:19:17,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:19:17,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:19:17,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:19:17,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:19:17,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:19:17,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:19:17,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:19:17,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:19:17,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:19:17,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:19:17,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:19:17,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:19:17,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:19:17,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:19:17,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:19:17,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:19:17,308 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:19:17,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:19:17,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:19:17,309 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:19:17,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:19:17,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:19:17,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:19:17,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:19:17,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:19:17,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:19:17,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:19:17,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:19:17,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:19:17,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:19:17,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:19:17,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:19:17,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:19:17,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:19:17,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:19:17,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:19:17,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:19:17,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:19:17,314 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:19:17,314 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:19:17,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:19:17,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:19:17,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:19:17,315 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2021-11-12 22:19:17,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:19:17,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:19:17,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:19:17,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:19:17,676 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:19:17,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-12 22:19:17,750 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/42eae5eb2/6b83ae618d3041319f07123f8f2e233d/FLAGff8d75450 [2021-11-12 22:19:18,379 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:19:18,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-12 22:19:18,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/42eae5eb2/6b83ae618d3041319f07123f8f2e233d/FLAGff8d75450 [2021-11-12 22:19:18,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/data/42eae5eb2/6b83ae618d3041319f07123f8f2e233d [2021-11-12 22:19:18,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:19:18,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:19:18,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:18,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:19:18,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:19:18,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:18" (1/1) ... [2021-11-12 22:19:18,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1541d834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:18, skipping insertion in model container [2021-11-12 22:19:18,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:18" (1/1) ... [2021-11-12 22:19:18,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:19:18,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:19:18,871 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-12 22:19:19,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:19,215 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:19:19,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:19:19,270 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-12 22:19:19,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:19,375 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:19:19,387 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_90aa30ae-055a-403b-9d59-d3b4a01c0a61/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-12 22:19:19,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:19,495 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:19:19,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19 WrapperNode [2021-11-12 22:19:19,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:19,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:19:19,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:19:19,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:19:19,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:19:19,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:19:19,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:19:19,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:19:19,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:19:19,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:19:19,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:19:19,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:19:19,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (1/1) ... [2021-11-12 22:19:19,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:19:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:19:19,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:19:19,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:19:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:19:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:19:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:19:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:19:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:19:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:19:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:19:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:19:19,811 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:19:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:19:19,811 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:19:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:19:19,811 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:19:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:19:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:19:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:19:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:19:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:19:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:19:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:19:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:19:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:19:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:19:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:19:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:19:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:19:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:19:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:19:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:19:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:19:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:19:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:19:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:19:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:19:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:19:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:19:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:19:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:19:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:19:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:19:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:19:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:19:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:19:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:19:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:19:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:19:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:19:19,818 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:19:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:19:19,818 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:19:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:19:19,818 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:19:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:19:19,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:19:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:19:19,819 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:19:23,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:19:23,749 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:19:23,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:19:23 BoogieIcfgContainer [2021-11-12 22:19:23,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:19:23,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:19:23,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:19:23,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:19:23,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:19:18" (1/3) ... [2021-11-12 22:19:23,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a12821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:19:23, skipping insertion in model container [2021-11-12 22:19:23,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:19" (2/3) ... [2021-11-12 22:19:23,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a12821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:19:23, skipping insertion in model container [2021-11-12 22:19:23,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:19:23" (3/3) ... [2021-11-12 22:19:23,763 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2021-11-12 22:19:23,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:19:23,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:19:23,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:19:23,835 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 22:19:23,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:19:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 588 states, 459 states have (on average 1.6884531590413943) internal successors, (775), 482 states have internal predecessors, (775), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-12 22:19:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:19:23,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:23,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:23,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:23,903 INFO L85 PathProgramCache]: Analyzing trace with hash 550728757, now seen corresponding path program 1 times [2021-11-12 22:19:23,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:23,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763911204] [2021-11-12 22:19:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:23,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:23,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:23,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:23,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:19:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:19:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:19:24,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:19:24,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:24,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763911204] [2021-11-12 22:19:24,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763911204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:24,938 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:24,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:19:24,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000760630] [2021-11-12 22:19:24,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:24,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:19:24,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:19:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:19:24,976 INFO L87 Difference]: Start difference. First operand has 588 states, 459 states have (on average 1.6884531590413943) internal successors, (775), 482 states have internal predecessors, (775), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:19:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:25,052 INFO L93 Difference]: Finished difference Result 609 states and 1007 transitions. [2021-11-12 22:19:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:19:25,055 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-12 22:19:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:25,081 INFO L225 Difference]: With dead ends: 609 [2021-11-12 22:19:25,082 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 22:19:25,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 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 22:19:25,090 INFO L933 BasicCegarLoop]: 968 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, 968 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:25,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 7.82ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:19:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 22:19:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 22:19:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 453 states have (on average 1.6865342163355408) internal successors, (764), 474 states have internal predecessors, (764), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 961 transitions. [2021-11-12 22:19:25,218 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 961 transitions. Word has length 83 [2021-11-12 22:19:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:25,220 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 961 transitions. [2021-11-12 22:19:25,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:19:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 961 transitions. [2021-11-12 22:19:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:19:25,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:25,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:25,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:19:25,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:25,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -473244636, now seen corresponding path program 1 times [2021-11-12 22:19:25,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:25,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334224115] [2021-11-12 22:19:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:25,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:25,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:25,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:19:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:26,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:26,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:26,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334224115] [2021-11-12 22:19:26,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334224115] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:26,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:26,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:26,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660844165] [2021-11-12 22:19:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:26,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:26,555 INFO L87 Difference]: Start difference. First operand 580 states and 961 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:26,700 INFO L93 Difference]: Finished difference Result 1151 states and 1914 transitions. [2021-11-12 22:19:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-12 22:19:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:26,711 INFO L225 Difference]: With dead ends: 1151 [2021-11-12 22:19:26,711 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 22:19:26,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:26,721 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 14 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:26,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2834 Invalid, 35 Unknown, 0 Unchecked, 21.14ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 37.06ms Time] [2021-11-12 22:19:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 22:19:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 22:19:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 453 states have (on average 1.684326710816777) internal successors, (763), 474 states have internal predecessors, (763), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 960 transitions. [2021-11-12 22:19:26,780 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 960 transitions. Word has length 85 [2021-11-12 22:19:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 960 transitions. [2021-11-12 22:19:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 960 transitions. [2021-11-12 22:19:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:19:26,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:26,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:26,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:27,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:27,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1800576756, now seen corresponding path program 1 times [2021-11-12 22:19:27,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:27,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513903358] [2021-11-12 22:19:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:27,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:27,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:27,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:19:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:27,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:28,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:28,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513903358] [2021-11-12 22:19:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513903358] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:28,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:28,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:28,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445941140] [2021-11-12 22:19:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:28,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:28,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:28,022 INFO L87 Difference]: Start difference. First operand 580 states and 960 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:28,107 INFO L93 Difference]: Finished difference Result 1151 states and 1912 transitions. [2021-11-12 22:19:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-12 22:19:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:28,115 INFO L225 Difference]: With dead ends: 1151 [2021-11-12 22:19:28,115 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 22:19:28,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:28,120 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 12 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:28,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2834 Invalid, 33 Unknown, 0 Unchecked, 11.31ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 31.00ms Time] [2021-11-12 22:19:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 22:19:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 22:19:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 453 states have (on average 1.6821192052980132) internal successors, (762), 474 states have internal predecessors, (762), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 959 transitions. [2021-11-12 22:19:28,151 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 959 transitions. Word has length 87 [2021-11-12 22:19:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:28,152 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 959 transitions. [2021-11-12 22:19:28,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 959 transitions. [2021-11-12 22:19:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:19:28,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:28,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:28,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:28,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:28,376 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1020101156, now seen corresponding path program 1 times [2021-11-12 22:19:28,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:28,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519570335] [2021-11-12 22:19:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:28,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:28,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:28,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:28,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:19:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:29,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:29,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:29,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519570335] [2021-11-12 22:19:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519570335] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:29,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842757845] [2021-11-12 22:19:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:29,374 INFO L87 Difference]: Start difference. First operand 580 states and 959 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:29,466 INFO L93 Difference]: Finished difference Result 1155 states and 1915 transitions. [2021-11-12 22:19:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-12 22:19:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:29,473 INFO L225 Difference]: With dead ends: 1155 [2021-11-12 22:19:29,473 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:19:29,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:29,477 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 13 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:29,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2834 Invalid, 35 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 43.34ms Time] [2021-11-12 22:19:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:19:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:19:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.6746724890829694) internal successors, (767), 479 states have internal predecessors, (767), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 964 transitions. [2021-11-12 22:19:29,506 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 964 transitions. Word has length 89 [2021-11-12 22:19:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 964 transitions. [2021-11-12 22:19:29,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 964 transitions. [2021-11-12 22:19:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:19:29,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:29,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:29,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:29,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:29,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1365390302, now seen corresponding path program 1 times [2021-11-12 22:19:29,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:29,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036436671] [2021-11-12 22:19:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:29,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:29,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:29,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:19:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:30,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:30,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:30,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036436671] [2021-11-12 22:19:30,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036436671] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:30,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:30,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:30,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290938362] [2021-11-12 22:19:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:30,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:30,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:30,724 INFO L87 Difference]: Start difference. First operand 586 states and 964 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:30,802 INFO L93 Difference]: Finished difference Result 1154 states and 1906 transitions. [2021-11-12 22:19:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-12 22:19:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:30,810 INFO L225 Difference]: With dead ends: 1154 [2021-11-12 22:19:30,810 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:19:30,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:30,815 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 8 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:30,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2835 Invalid, 30 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 29.41ms Time] [2021-11-12 22:19:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:19:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:19:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.6724890829694323) internal successors, (766), 479 states have internal predecessors, (766), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 963 transitions. [2021-11-12 22:19:30,846 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 963 transitions. Word has length 90 [2021-11-12 22:19:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:30,846 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 963 transitions. [2021-11-12 22:19:30,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 963 transitions. [2021-11-12 22:19:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 22:19:30,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:30,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:30,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:31,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:31,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1167027432, now seen corresponding path program 1 times [2021-11-12 22:19:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:31,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82042148] [2021-11-12 22:19:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:31,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:31,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:19:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:31,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:32,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:32,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82042148] [2021-11-12 22:19:32,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82042148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:32,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:32,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:32,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724066201] [2021-11-12 22:19:32,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:32,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:32,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:32,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:32,066 INFO L87 Difference]: Start difference. First operand 586 states and 963 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:32,161 INFO L93 Difference]: Finished difference Result 1154 states and 1905 transitions. [2021-11-12 22:19:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-12 22:19:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:32,167 INFO L225 Difference]: With dead ends: 1154 [2021-11-12 22:19:32,168 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:19:32,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:32,172 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 6 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:32,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2835 Invalid, 28 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 33.92ms Time] [2021-11-12 22:19:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:19:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:19:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.6703056768558953) internal successors, (765), 479 states have internal predecessors, (765), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 962 transitions. [2021-11-12 22:19:32,199 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 962 transitions. Word has length 91 [2021-11-12 22:19:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:32,200 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 962 transitions. [2021-11-12 22:19:32,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 962 transitions. [2021-11-12 22:19:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:19:32,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:32,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:32,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:32,423 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1535807462, now seen corresponding path program 1 times [2021-11-12 22:19:32,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:32,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341359659] [2021-11-12 22:19:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:32,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:32,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:32,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:19:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:33,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:33,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:33,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341359659] [2021-11-12 22:19:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341359659] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:33,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:19:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715577565] [2021-11-12 22:19:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:33,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:33,521 INFO L87 Difference]: Start difference. First operand 586 states and 962 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:33,746 INFO L93 Difference]: Finished difference Result 1171 states and 1933 transitions. [2021-11-12 22:19:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-12 22:19:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:33,779 INFO L225 Difference]: With dead ends: 1171 [2021-11-12 22:19:33,779 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 22:19:33,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 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 22:19:33,783 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 148 mSDsluCounter, 4623 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5569 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:33,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5569 Invalid, 85 Unknown, 0 Unchecked, 12.74ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 162.21ms Time] [2021-11-12 22:19:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 22:19:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2021-11-12 22:19:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 474 states have (on average 1.6687763713080168) internal successors, (791), 497 states have internal predecessors, (791), 102 states have call successors, (102), 27 states have call predecessors, (102), 28 states have return successors, (100), 94 states have call predecessors, (100), 97 states have call successors, (100) [2021-11-12 22:19:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 993 transitions. [2021-11-12 22:19:33,811 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 993 transitions. Word has length 92 [2021-11-12 22:19:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:33,812 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 993 transitions. [2021-11-12 22:19:33,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 993 transitions. [2021-11-12 22:19:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:19:33,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:33,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:33,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:34,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:34,030 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1892107609, now seen corresponding path program 1 times [2021-11-12 22:19:34,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:34,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213942504] [2021-11-12 22:19:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:34,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:34,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:34,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:19:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:19:34,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:34,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:34,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213942504] [2021-11-12 22:19:34,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213942504] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:34,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:34,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:19:34,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420916280] [2021-11-12 22:19:34,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:34,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:34,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:34,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:19:34,999 INFO L87 Difference]: Start difference. First operand 605 states and 993 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:35,094 INFO L93 Difference]: Finished difference Result 1184 states and 1955 transitions. [2021-11-12 22:19:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-12 22:19:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:35,101 INFO L225 Difference]: With dead ends: 1184 [2021-11-12 22:19:35,101 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 22:19:35,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:35,105 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 8 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:35,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2834 Invalid, 30 Unknown, 0 Unchecked, 9.12ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 43.77ms Time] [2021-11-12 22:19:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 22:19:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 22:19:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 472 states have (on average 1.6694915254237288) internal successors, (788), 494 states have internal predecessors, (788), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:19:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 986 transitions. [2021-11-12 22:19:35,133 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 986 transitions. Word has length 92 [2021-11-12 22:19:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:35,134 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 986 transitions. [2021-11-12 22:19:35,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 986 transitions. [2021-11-12 22:19:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:19:35,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:35,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:35,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:35,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:35,354 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 185942167, now seen corresponding path program 1 times [2021-11-12 22:19:35,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:35,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879642140] [2021-11-12 22:19:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:35,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:35,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:35,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:19:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:36,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:19:36,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:36,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879642140] [2021-11-12 22:19:36,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879642140] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:36,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:36,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:36,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599330485] [2021-11-12 22:19:36,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:36,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:36,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:36,293 INFO L87 Difference]: Start difference. First operand 601 states and 986 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:36,484 INFO L93 Difference]: Finished difference Result 1210 states and 2000 transitions. [2021-11-12 22:19:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-12 22:19:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:36,492 INFO L225 Difference]: With dead ends: 1210 [2021-11-12 22:19:36,492 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 22:19:36,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:36,498 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 134 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.11ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:36,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2642 Invalid, 131 Unknown, 0 Unchecked, 6.11ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 144.41ms Time] [2021-11-12 22:19:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 22:19:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 22:19:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 472 states have (on average 1.6588983050847457) internal successors, (783), 494 states have internal predecessors, (783), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:19:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 981 transitions. [2021-11-12 22:19:36,528 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 981 transitions. Word has length 93 [2021-11-12 22:19:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:36,529 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 981 transitions. [2021-11-12 22:19:36,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 981 transitions. [2021-11-12 22:19:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:19:36,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:36,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:36,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:36,746 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 544825241, now seen corresponding path program 1 times [2021-11-12 22:19:36,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:36,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745532311] [2021-11-12 22:19:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:36,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:36,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:36,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:19:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:19:37,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:37,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745532311] [2021-11-12 22:19:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745532311] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:37,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:37,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:37,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204862844] [2021-11-12 22:19:37,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:37,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:37,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:37,830 INFO L87 Difference]: Start difference. First operand 601 states and 981 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:38,038 INFO L93 Difference]: Finished difference Result 1210 states and 1990 transitions. [2021-11-12 22:19:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-12 22:19:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:38,045 INFO L225 Difference]: With dead ends: 1210 [2021-11-12 22:19:38,046 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 22:19:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:38,055 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 128 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.44ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:38,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2642 Invalid, 121 Unknown, 0 Unchecked, 7.44ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 157.27ms Time] [2021-11-12 22:19:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 22:19:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 22:19:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 472 states have (on average 1.6483050847457628) internal successors, (778), 494 states have internal predecessors, (778), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:19:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 976 transitions. [2021-11-12 22:19:38,080 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 976 transitions. Word has length 95 [2021-11-12 22:19:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:38,080 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 976 transitions. [2021-11-12 22:19:38,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 976 transitions. [2021-11-12 22:19:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:19:38,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:38,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:38,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:38,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:38,302 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:38,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -345355401, now seen corresponding path program 1 times [2021-11-12 22:19:38,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:38,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760118772] [2021-11-12 22:19:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:38,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:38,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:38,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:19:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:38,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:19:39,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:39,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760118772] [2021-11-12 22:19:39,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760118772] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:39,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:39,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:39,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282390334] [2021-11-12 22:19:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:39,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:39,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:39,291 INFO L87 Difference]: Start difference. First operand 601 states and 976 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:39,502 INFO L93 Difference]: Finished difference Result 1231 states and 2011 transitions. [2021-11-12 22:19:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-12 22:19:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:39,510 INFO L225 Difference]: With dead ends: 1231 [2021-11-12 22:19:39,510 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 22:19:39,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:39,516 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 143 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:39,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2652 Invalid, 131 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 164.17ms Time] [2021-11-12 22:19:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 22:19:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 616. [2021-11-12 22:19:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 487 states have (on average 1.6283367556468173) internal successors, (793), 508 states have internal predecessors, (793), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 990 transitions. [2021-11-12 22:19:39,545 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 990 transitions. Word has length 97 [2021-11-12 22:19:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:39,546 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 990 transitions. [2021-11-12 22:19:39,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 990 transitions. [2021-11-12 22:19:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:19:39,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:39,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:39,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:39,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:39,773 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash -469229833, now seen corresponding path program 1 times [2021-11-12 22:19:39,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:39,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490069146] [2021-11-12 22:19:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:39,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:39,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:39,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:19:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:40,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:40,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490069146] [2021-11-12 22:19:40,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490069146] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:40,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:40,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:19:40,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042979188] [2021-11-12 22:19:40,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:40,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:40,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:40,801 INFO L87 Difference]: Start difference. First operand 616 states and 990 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:40,980 INFO L93 Difference]: Finished difference Result 1195 states and 1932 transitions. [2021-11-12 22:19:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-12 22:19:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:40,987 INFO L225 Difference]: With dead ends: 1195 [2021-11-12 22:19:40,988 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 22:19:40,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 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 22:19:40,992 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 131 mSDsluCounter, 4588 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5537 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.81ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:40,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5537 Invalid, 75 Unknown, 0 Unchecked, 9.81ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 125.98ms Time] [2021-11-12 22:19:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 22:19:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 595. [2021-11-12 22:19:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 466 states have (on average 1.6223175965665235) internal successors, (756), 487 states have internal predecessors, (756), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 953 transitions. [2021-11-12 22:19:41,038 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 953 transitions. Word has length 97 [2021-11-12 22:19:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:41,039 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 953 transitions. [2021-11-12 22:19:41,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 953 transitions. [2021-11-12 22:19:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:19:41,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:41,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:41,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:41,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:41,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:41,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2043164419, now seen corresponding path program 1 times [2021-11-12 22:19:41,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:41,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420448834] [2021-11-12 22:19:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:41,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:41,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:41,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:19:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:41,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:19:42,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:42,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420448834] [2021-11-12 22:19:42,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420448834] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:42,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:42,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:42,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806314824] [2021-11-12 22:19:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:42,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:42,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:42,205 INFO L87 Difference]: Start difference. First operand 595 states and 953 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:42,323 INFO L93 Difference]: Finished difference Result 1159 states and 1870 transitions. [2021-11-12 22:19:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:42,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-12 22:19:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:42,329 INFO L225 Difference]: With dead ends: 1159 [2021-11-12 22:19:42,329 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:19:42,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:42,334 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 69 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:42,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2666 Invalid, 54 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 86.55ms Time] [2021-11-12 22:19:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:19:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 22:19:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 466 states have (on average 1.6201716738197425) internal successors, (755), 487 states have internal predecessors, (755), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 952 transitions. [2021-11-12 22:19:42,356 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 952 transitions. Word has length 98 [2021-11-12 22:19:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:42,357 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 952 transitions. [2021-11-12 22:19:42,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 952 transitions. [2021-11-12 22:19:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:19:42,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:42,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:42,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:42,573 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash -745955310, now seen corresponding path program 1 times [2021-11-12 22:19:42,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:42,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528953908] [2021-11-12 22:19:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:42,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:42,575 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:42,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:19:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:43,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:43,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:19:43,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:43,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528953908] [2021-11-12 22:19:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528953908] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:43,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:43,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:19:43,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261572437] [2021-11-12 22:19:43,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:19:43,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:19:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:43,530 INFO L87 Difference]: Start difference. First operand 595 states and 952 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:43,647 INFO L93 Difference]: Finished difference Result 1159 states and 1869 transitions. [2021-11-12 22:19:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 22:19:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:43,654 INFO L225 Difference]: With dead ends: 1159 [2021-11-12 22:19:43,654 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:19:43,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:43,658 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 67 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:43,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2666 Invalid, 52 Unknown, 0 Unchecked, 3.75ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 83.69ms Time] [2021-11-12 22:19:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:19:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 22:19:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 466 states have (on average 1.6180257510729614) internal successors, (754), 487 states have internal predecessors, (754), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 951 transitions. [2021-11-12 22:19:43,683 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 951 transitions. Word has length 99 [2021-11-12 22:19:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:43,683 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 951 transitions. [2021-11-12 22:19:43,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:19:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 951 transitions. [2021-11-12 22:19:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 22:19:43,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:43,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:43,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:43,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:43,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -833143810, now seen corresponding path program 1 times [2021-11-12 22:19:43,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:43,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698395755] [2021-11-12 22:19:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:43,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:43,909 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:43,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:19:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:19:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:44,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:45,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:45,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698395755] [2021-11-12 22:19:45,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698395755] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:45,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:45,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:19:45,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297625528] [2021-11-12 22:19:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:45,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:45,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:45,064 INFO L87 Difference]: Start difference. First operand 595 states and 951 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:45,341 INFO L93 Difference]: Finished difference Result 1164 states and 1876 transitions. [2021-11-12 22:19:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-12 22:19:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:45,347 INFO L225 Difference]: With dead ends: 1164 [2021-11-12 22:19:45,347 INFO L226 Difference]: Without dead ends: 606 [2021-11-12 22:19:45,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:45,352 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 109 mSDsluCounter, 5294 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6187 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:45,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6187 Invalid, 152 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 171.33ms Time] [2021-11-12 22:19:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-12 22:19:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 597. [2021-11-12 22:19:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 468 states have (on average 1.6132478632478633) internal successors, (755), 489 states have internal predecessors, (755), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 952 transitions. [2021-11-12 22:19:45,377 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 952 transitions. Word has length 100 [2021-11-12 22:19:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:45,378 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 952 transitions. [2021-11-12 22:19:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 952 transitions. [2021-11-12 22:19:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:19:45,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:45,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:45,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:45,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:45,601 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1200694819, now seen corresponding path program 1 times [2021-11-12 22:19:45,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:45,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836245006] [2021-11-12 22:19:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:45,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:45,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:45,604 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:45,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:19:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:46,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:46,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:46,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836245006] [2021-11-12 22:19:46,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836245006] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:46,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:46,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:19:46,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291358077] [2021-11-12 22:19:46,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:46,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:46,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:46,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:46,733 INFO L87 Difference]: Start difference. First operand 597 states and 952 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:46,949 INFO L93 Difference]: Finished difference Result 1156 states and 1857 transitions. [2021-11-12 22:19:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-12 22:19:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:46,956 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 22:19:46,956 INFO L226 Difference]: Without dead ends: 602 [2021-11-12 22:19:46,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:46,960 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 77 mSDsluCounter, 5300 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6195 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:46,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6195 Invalid, 152 Unknown, 0 Unchecked, 7.10ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 152.95ms Time] [2021-11-12 22:19:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-12 22:19:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 599. [2021-11-12 22:19:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 470 states have (on average 1.6085106382978724) internal successors, (756), 491 states have internal predecessors, (756), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 953 transitions. [2021-11-12 22:19:46,984 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 953 transitions. Word has length 101 [2021-11-12 22:19:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:46,984 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 953 transitions. [2021-11-12 22:19:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 953 transitions. [2021-11-12 22:19:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:19:46,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:46,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:47,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:47,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -990600280, now seen corresponding path program 1 times [2021-11-12 22:19:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:47,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617987935] [2021-11-12 22:19:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:47,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:47,209 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:47,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:19:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:47,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:48,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:48,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617987935] [2021-11-12 22:19:48,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617987935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:48,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:48,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:48,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592740037] [2021-11-12 22:19:48,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:48,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:48,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:48,157 INFO L87 Difference]: Start difference. First operand 599 states and 953 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:48,362 INFO L93 Difference]: Finished difference Result 1102 states and 1784 transitions. [2021-11-12 22:19:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-12 22:19:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:48,369 INFO L225 Difference]: With dead ends: 1102 [2021-11-12 22:19:48,369 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:19:48,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 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 22:19:48,373 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 55 mSDsluCounter, 8039 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8946 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:48,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 8946 Invalid, 131 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 157.66ms Time] [2021-11-12 22:19:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:19:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:19:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 463 states have (on average 1.6155507559395248) internal successors, (748), 484 states have internal predecessors, (748), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 945 transitions. [2021-11-12 22:19:48,395 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 945 transitions. Word has length 102 [2021-11-12 22:19:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:48,396 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 945 transitions. [2021-11-12 22:19:48,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 945 transitions. [2021-11-12 22:19:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:19:48,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:48,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:48,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:48,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:48,613 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2090501569, now seen corresponding path program 1 times [2021-11-12 22:19:48,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:48,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100600822] [2021-11-12 22:19:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:48,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:48,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:48,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:48,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:19:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:49,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:49,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:49,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100600822] [2021-11-12 22:19:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100600822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:49,664 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:49,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315282612] [2021-11-12 22:19:49,666 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:49,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:49,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:49,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:49,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:49,667 INFO L87 Difference]: Start difference. First operand 592 states and 945 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:49,836 INFO L93 Difference]: Finished difference Result 1107 states and 1798 transitions. [2021-11-12 22:19:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-12 22:19:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:49,842 INFO L225 Difference]: With dead ends: 1107 [2021-11-12 22:19:49,843 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 22:19:49,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 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 22:19:49,846 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 147 mSDsluCounter, 6230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 7129 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:49,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 7129 Invalid, 98 Unknown, 0 Unchecked, 31.64ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 103.74ms Time] [2021-11-12 22:19:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 22:19:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 22:19:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 460 states have (on average 1.6152173913043477) internal successors, (743), 481 states have internal predecessors, (743), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 940 transitions. [2021-11-12 22:19:49,868 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 940 transitions. Word has length 103 [2021-11-12 22:19:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:49,869 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 940 transitions. [2021-11-12 22:19:49,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 940 transitions. [2021-11-12 22:19:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:19:49,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:49,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:49,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:50,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:50,092 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2026682047, now seen corresponding path program 1 times [2021-11-12 22:19:50,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:50,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13335618] [2021-11-12 22:19:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:50,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:50,094 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:50,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:19:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:50,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:51,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:51,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13335618] [2021-11-12 22:19:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13335618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:51,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:19:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514947904] [2021-11-12 22:19:51,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:51,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:51,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:51,054 INFO L87 Difference]: Start difference. First operand 589 states and 940 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:19:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:51,190 INFO L93 Difference]: Finished difference Result 1104 states and 1793 transitions. [2021-11-12 22:19:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-12 22:19:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:51,196 INFO L225 Difference]: With dead ends: 1104 [2021-11-12 22:19:51,196 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 22:19:51,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:51,200 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 105 mSDsluCounter, 4427 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:51,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5325 Invalid, 68 Unknown, 0 Unchecked, 5.07ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 101.40ms Time] [2021-11-12 22:19:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 22:19:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 22:19:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 452 states have (on average 1.6194690265486726) internal successors, (732), 473 states have internal predecessors, (732), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 929 transitions. [2021-11-12 22:19:51,222 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 929 transitions. Word has length 103 [2021-11-12 22:19:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:51,223 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 929 transitions. [2021-11-12 22:19:51,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:19:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 929 transitions. [2021-11-12 22:19:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:19:51,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:51,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:51,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:51,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:51,446 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1370149036, now seen corresponding path program 1 times [2021-11-12 22:19:51,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:51,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502239073] [2021-11-12 22:19:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:51,448 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:51,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:19:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:19:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:52,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:52,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:52,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502239073] [2021-11-12 22:19:52,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502239073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:52,554 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:52,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:52,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101392994] [2021-11-12 22:19:52,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:52,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:52,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:52,560 INFO L87 Difference]: Start difference. First operand 581 states and 929 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:52,758 INFO L93 Difference]: Finished difference Result 1090 states and 1771 transitions. [2021-11-12 22:19:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-12 22:19:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:52,763 INFO L225 Difference]: With dead ends: 1090 [2021-11-12 22:19:52,763 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 22:19:52,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 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 22:19:52,767 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 101 mSDsluCounter, 7072 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7966 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:52,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7966 Invalid, 150 Unknown, 0 Unchecked, 6.41ms Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 146.75ms Time] [2021-11-12 22:19:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 22:19:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 22:19:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 452 states have (on average 1.6172566371681416) internal successors, (731), 473 states have internal predecessors, (731), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 928 transitions. [2021-11-12 22:19:52,788 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 928 transitions. Word has length 104 [2021-11-12 22:19:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:52,789 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 928 transitions. [2021-11-12 22:19:52,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 928 transitions. [2021-11-12 22:19:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:19:52,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:52,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:52,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:53,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:53,006 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:53,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1233294429, now seen corresponding path program 1 times [2021-11-12 22:19:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:53,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174950823] [2021-11-12 22:19:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:53,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:53,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:53,008 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:53,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:19:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:19:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:54,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:54,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174950823] [2021-11-12 22:19:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174950823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:54,114 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:54,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597071708] [2021-11-12 22:19:54,115 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:54,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:54,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:54,116 INFO L87 Difference]: Start difference. First operand 581 states and 928 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:54,381 INFO L93 Difference]: Finished difference Result 1134 states and 1828 transitions. [2021-11-12 22:19:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-12 22:19:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:54,386 INFO L225 Difference]: With dead ends: 1134 [2021-11-12 22:19:54,387 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 22:19:54,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:54,390 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 148 mSDsluCounter, 6999 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 7881 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:54,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 7881 Invalid, 140 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 167.40ms Time] [2021-11-12 22:19:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 22:19:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-12 22:19:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.6102449888641426) internal successors, (723), 470 states have internal predecessors, (723), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 920 transitions. [2021-11-12 22:19:54,410 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 920 transitions. Word has length 105 [2021-11-12 22:19:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:54,410 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 920 transitions. [2021-11-12 22:19:54,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 920 transitions. [2021-11-12 22:19:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:19:54,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:54,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:54,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:54,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:54,626 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -957714287, now seen corresponding path program 1 times [2021-11-12 22:19:54,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:54,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445570070] [2021-11-12 22:19:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:54,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:54,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:54,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:54,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:19:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:55,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:55,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:55,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445570070] [2021-11-12 22:19:55,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445570070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:55,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:55,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:55,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987941610] [2021-11-12 22:19:55,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:55,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:55,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:55,717 INFO L87 Difference]: Start difference. First operand 578 states and 920 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:55,969 INFO L93 Difference]: Finished difference Result 1081 states and 1751 transitions. [2021-11-12 22:19:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-12 22:19:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:55,975 INFO L225 Difference]: With dead ends: 1081 [2021-11-12 22:19:55,975 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 22:19:55,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 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 22:19:55,979 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 68 mSDsluCounter, 7861 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 8744 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:55,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 8744 Invalid, 148 Unknown, 0 Unchecked, 8.91ms Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 185.29ms Time] [2021-11-12 22:19:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 22:19:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-12 22:19:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.6080178173719377) internal successors, (722), 470 states have internal predecessors, (722), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 919 transitions. [2021-11-12 22:19:55,998 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 919 transitions. Word has length 106 [2021-11-12 22:19:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:55,998 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 919 transitions. [2021-11-12 22:19:55,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 919 transitions. [2021-11-12 22:19:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:19:56,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:56,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:56,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:56,214 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1013602802, now seen corresponding path program 1 times [2021-11-12 22:19:56,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:56,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216061799] [2021-11-12 22:19:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:56,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:56,216 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:56,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:19:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:56,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:57,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:57,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216061799] [2021-11-12 22:19:57,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216061799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:57,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:57,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:57,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987742630] [2021-11-12 22:19:57,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:57,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:57,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:57,311 INFO L87 Difference]: Start difference. First operand 578 states and 919 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:57,540 INFO L93 Difference]: Finished difference Result 1119 states and 1796 transitions. [2021-11-12 22:19:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:19:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-12 22:19:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:57,546 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 22:19:57,547 INFO L226 Difference]: Without dead ends: 575 [2021-11-12 22:19:57,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:57,550 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 111 mSDsluCounter, 7868 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 8749 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:57,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 8749 Invalid, 154 Unknown, 0 Unchecked, 6.61ms Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 166.64ms Time] [2021-11-12 22:19:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-12 22:19:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-12 22:19:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 446 states have (on average 1.600896860986547) internal successors, (714), 467 states have internal predecessors, (714), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 911 transitions. [2021-11-12 22:19:57,570 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 911 transitions. Word has length 107 [2021-11-12 22:19:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:57,571 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 911 transitions. [2021-11-12 22:19:57,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:19:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 911 transitions. [2021-11-12 22:19:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:19:57,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:57,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:57,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:57,790 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash 460453686, now seen corresponding path program 1 times [2021-11-12 22:19:57,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:57,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776002446] [2021-11-12 22:19:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:57,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:57,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:57,792 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:57,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:19:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:58,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:19:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:19:59,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:59,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776002446] [2021-11-12 22:19:59,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776002446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:59,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:59,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 22:19:59,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716918709] [2021-11-12 22:19:59,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:59,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:19:59,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:19:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:19:59,417 INFO L87 Difference]: Start difference. First operand 575 states and 911 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:20:01,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:03,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:05,472 WARN L515 Checker$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 22:20:07,478 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 22:20:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:16,791 INFO L93 Difference]: Finished difference Result 2755 states and 4566 transitions. [2021-11-12 22:20:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:20:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-12 22:20:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:16,804 INFO L225 Difference]: With dead ends: 2755 [2021-11-12 22:20:16,804 INFO L226 Difference]: Without dead ends: 2260 [2021-11-12 22:20:16,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:20:16,808 INFO L933 BasicCegarLoop]: 1576 mSDtfsCounter, 4933 mSDsluCounter, 2285 mSDsCounter, 0 mSdLazyCounter, 6301 mSolverCounterSat, 1282 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15848.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5115 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 7587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.40ms SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 6301 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17019.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5115 Valid, 3861 Invalid, 7587 Unknown, 0 Unchecked, 45.40ms Time], IncrementalHoareTripleChecker [1282 Valid, 6301 Invalid, 4 Unknown, 0 Unchecked, 17019.07ms Time] [2021-11-12 22:20:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-11-12 22:20:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2078. [2021-11-12 22:20:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 1599 states have (on average 1.6566604127579738) internal successors, (2649), 1664 states have internal predecessors, (2649), 394 states have call successors, (394), 81 states have call predecessors, (394), 84 states have return successors, (402), 359 states have call predecessors, (402), 389 states have call successors, (402) [2021-11-12 22:20:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3445 transitions. [2021-11-12 22:20:16,961 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3445 transitions. Word has length 108 [2021-11-12 22:20:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:16,962 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 3445 transitions. [2021-11-12 22:20:16,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:20:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3445 transitions. [2021-11-12 22:20:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:20:16,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:16,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:16,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:17,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:17,178 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1518309680, now seen corresponding path program 1 times [2021-11-12 22:20:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:17,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965172669] [2021-11-12 22:20:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:17,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:17,180 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:17,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:20:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:20:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:18,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:19,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:19,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965172669] [2021-11-12 22:20:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965172669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:19,465 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:20:19,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065954158] [2021-11-12 22:20:19,466 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:20:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:20:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:20:19,467 INFO L87 Difference]: Start difference. First operand 2078 states and 3445 transitions. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 22:20:21,498 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 22:20:23,504 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 22:20:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:26,808 INFO L93 Difference]: Finished difference Result 4613 states and 7803 transitions. [2021-11-12 22:20:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:20:26,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) Word has length 147 [2021-11-12 22:20:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:26,831 INFO L225 Difference]: With dead ends: 4613 [2021-11-12 22:20:26,831 INFO L226 Difference]: Without dead ends: 2615 [2021-11-12 22:20:26,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:20:26,846 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 2095 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 814 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6670.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.00ms SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7136.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:26,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 2368 Invalid, 3584 Unknown, 0 Unchecked, 17.00ms Time], IncrementalHoareTripleChecker [814 Valid, 2768 Invalid, 2 Unknown, 0 Unchecked, 7136.80ms Time] [2021-11-12 22:20:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-11-12 22:20:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2094. [2021-11-12 22:20:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 1611 states have (on average 1.6517690875232776) internal successors, (2661), 1676 states have internal predecessors, (2661), 394 states have call successors, (394), 81 states have call predecessors, (394), 88 states have return successors, (466), 363 states have call predecessors, (466), 389 states have call successors, (466) [2021-11-12 22:20:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3521 transitions. [2021-11-12 22:20:26,979 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3521 transitions. Word has length 147 [2021-11-12 22:20:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 3521 transitions. [2021-11-12 22:20:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 22:20:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3521 transitions. [2021-11-12 22:20:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:20:26,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:26,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:27,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:27,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:27,210 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash 442615556, now seen corresponding path program 1 times [2021-11-12 22:20:27,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:27,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141919459] [2021-11-12 22:20:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:27,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:27,212 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:27,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:20:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:27,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:20:27,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:28,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:28,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:28,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141919459] [2021-11-12 22:20:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141919459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:28,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:28,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:20:28,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050816000] [2021-11-12 22:20:28,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:28,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:20:28,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:20:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:20:28,771 INFO L87 Difference]: Start difference. First operand 2094 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 22:20:30,802 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 22:20:32,807 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 22:20:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:40,588 INFO L93 Difference]: Finished difference Result 5510 states and 9362 transitions. [2021-11-12 22:20:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:20:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) Word has length 147 [2021-11-12 22:20:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:40,617 INFO L225 Difference]: With dead ends: 5510 [2021-11-12 22:20:40,617 INFO L226 Difference]: Without dead ends: 3496 [2021-11-12 22:20:40,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:20:40,626 INFO L933 BasicCegarLoop]: 1831 mSDtfsCounter, 4013 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 7313 mSolverCounterSat, 1517 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10326.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4103 SdHoareTripleChecker+Valid, 4823 SdHoareTripleChecker+Invalid, 8832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.90ms SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 7313 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11285.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:40,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4103 Valid, 4823 Invalid, 8832 Unknown, 0 Unchecked, 39.90ms Time], IncrementalHoareTripleChecker [1517 Valid, 7313 Invalid, 2 Unknown, 0 Unchecked, 11285.95ms Time] [2021-11-12 22:20:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-12 22:20:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3022. [2021-11-12 22:20:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 2271 states have (on average 1.616908850726552) internal successors, (3672), 2362 states have internal predecessors, (3672), 616 states have call successors, (616), 112 states have call predecessors, (616), 134 states have return successors, (718), 580 states have call predecessors, (718), 611 states have call successors, (718) [2021-11-12 22:20:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 5006 transitions. [2021-11-12 22:20:40,897 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 5006 transitions. Word has length 147 [2021-11-12 22:20:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:40,897 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 5006 transitions. [2021-11-12 22:20:40,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 22:20:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 5006 transitions. [2021-11-12 22:20:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:20:40,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:40,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:40,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:41,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:41,126 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1300326544, now seen corresponding path program 1 times [2021-11-12 22:20:41,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:41,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362370182] [2021-11-12 22:20:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:41,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:41,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:41,134 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:41,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:20:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:20:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:42,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:20:42,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:42,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362370182] [2021-11-12 22:20:42,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362370182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:42,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:42,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:20:42,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114669357] [2021-11-12 22:20:42,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:42,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:20:42,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:20:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:20:42,826 INFO L87 Difference]: Start difference. First operand 3022 states and 5006 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:20:44,855 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 22:20:46,860 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 22:20:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:52,381 INFO L93 Difference]: Finished difference Result 9874 states and 16857 transitions. [2021-11-12 22:20:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:20:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 148 [2021-11-12 22:20:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:52,428 INFO L225 Difference]: With dead ends: 9874 [2021-11-12 22:20:52,428 INFO L226 Difference]: Without dead ends: 6932 [2021-11-12 22:20:52,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:20:52,445 INFO L933 BasicCegarLoop]: 1476 mSDtfsCounter, 4015 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 1144 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8364.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 3701 SdHoareTripleChecker+Invalid, 5520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.74ms SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9065.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:52,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 3701 Invalid, 5520 Unknown, 0 Unchecked, 26.74ms Time], IncrementalHoareTripleChecker [1144 Valid, 4374 Invalid, 2 Unknown, 0 Unchecked, 9065.84ms Time] [2021-11-12 22:20:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-11-12 22:20:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6590. [2021-11-12 22:20:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6590 states, 4961 states have (on average 1.6147954041523886) internal successors, (8011), 5179 states have internal predecessors, (8011), 1320 states have call successors, (1320), 272 states have call predecessors, (1320), 308 states have return successors, (1530), 1215 states have call predecessors, (1530), 1315 states have call successors, (1530) [2021-11-12 22:20:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 10861 transitions. [2021-11-12 22:20:52,979 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 10861 transitions. Word has length 148 [2021-11-12 22:20:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:52,979 INFO L470 AbstractCegarLoop]: Abstraction has 6590 states and 10861 transitions. [2021-11-12 22:20:52,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:20:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 10861 transitions. [2021-11-12 22:20:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:20:52,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:52,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:53,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:53,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:53,200 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1092412142, now seen corresponding path program 1 times [2021-11-12 22:20:53,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:53,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403298331] [2021-11-12 22:20:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:53,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:53,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:53,202 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:20:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:20:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:20:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:21:00,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:00,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403298331] [2021-11-12 22:21:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403298331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:00,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-12 22:21:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181293655] [2021-11-12 22:21:00,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:21:00,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:21:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:00,602 INFO L87 Difference]: Start difference. First operand 6590 states and 10861 transitions. Second operand has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-12 22:21:02,634 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 22:21:04,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:06,645 WARN L515 Checker$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 22:21:08,651 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 22:21:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:17,364 INFO L93 Difference]: Finished difference Result 16340 states and 27126 transitions. [2021-11-12 22:21:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:21:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) Word has length 150 [2021-11-12 22:21:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:17,470 INFO L225 Difference]: With dead ends: 16340 [2021-11-12 22:21:17,470 INFO L226 Difference]: Without dead ends: 9830 [2021-11-12 22:21:17,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:21:17,495 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 8428 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 5896 mSolverCounterSat, 2417 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14661.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8506 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 8317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.94ms SdHoareTripleChecker+Time, 2417 IncrementalHoareTripleChecker+Valid, 5896 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15719.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:17,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8506 Valid, 3478 Invalid, 8317 Unknown, 0 Unchecked, 35.94ms Time], IncrementalHoareTripleChecker [2417 Valid, 5896 Invalid, 4 Unknown, 0 Unchecked, 15719.20ms Time] [2021-11-12 22:21:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9830 states. [2021-11-12 22:21:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9830 to 9292. [2021-11-12 22:21:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 6915 states have (on average 1.608532176428055) internal successors, (11123), 7247 states have internal predecessors, (11123), 1945 states have call successors, (1945), 381 states have call predecessors, (1945), 431 states have return successors, (2251), 1784 states have call predecessors, (2251), 1940 states have call successors, (2251) [2021-11-12 22:21:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 15319 transitions. [2021-11-12 22:21:18,276 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 15319 transitions. Word has length 150 [2021-11-12 22:21:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:18,278 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 15319 transitions. [2021-11-12 22:21:18,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-12 22:21:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 15319 transitions. [2021-11-12 22:21:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 22:21:18,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:18,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:18,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:18,506 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1957515525, now seen corresponding path program 1 times [2021-11-12 22:21:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:18,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196422151] [2021-11-12 22:21:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:18,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:18,508 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:18,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:21:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:21:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:19,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:20,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:20,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196422151] [2021-11-12 22:21:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196422151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:20,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:21:20,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992834292] [2021-11-12 22:21:20,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:21:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:21:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:21:20,352 INFO L87 Difference]: Start difference. First operand 9292 states and 15319 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:21:22,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:24,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:26,402 WARN L515 Checker$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 22:21:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:36,603 INFO L93 Difference]: Finished difference Result 32440 states and 55361 transitions. [2021-11-12 22:21:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:21:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 154 [2021-11-12 22:21:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:36,793 INFO L225 Difference]: With dead ends: 32440 [2021-11-12 22:21:36,793 INFO L226 Difference]: Without dead ends: 23186 [2021-11-12 22:21:36,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:21:36,849 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 3718 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 7343 mSolverCounterSat, 1754 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13584.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3820 SdHoareTripleChecker+Valid, 4968 SdHoareTripleChecker+Invalid, 9100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.34ms SdHoareTripleChecker+Time, 1754 IncrementalHoareTripleChecker+Valid, 7343 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14679.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:36,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3820 Valid, 4968 Invalid, 9100 Unknown, 0 Unchecked, 40.34ms Time], IncrementalHoareTripleChecker [1754 Valid, 7343 Invalid, 3 Unknown, 0 Unchecked, 14679.23ms Time] [2021-11-12 22:21:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23186 states. [2021-11-12 22:21:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23186 to 18329. [2021-11-12 22:21:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 13163 states have (on average 1.588999468206336) internal successors, (20916), 13957 states have internal predecessors, (20916), 4348 states have call successors, (4348), 639 states have call predecessors, (4348), 817 states have return successors, (5242), 4150 states have call predecessors, (5242), 4343 states have call successors, (5242) [2021-11-12 22:21:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 30506 transitions. [2021-11-12 22:21:38,801 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 30506 transitions. Word has length 154 [2021-11-12 22:21:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 18329 states and 30506 transitions. [2021-11-12 22:21:38,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:21:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 30506 transitions. [2021-11-12 22:21:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 22:21:38,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:38,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:38,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:39,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:39,030 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 376150900, now seen corresponding path program 1 times [2021-11-12 22:21:39,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:39,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665774372] [2021-11-12 22:21:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:39,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:39,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:39,033 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:39,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:21:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:40,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:40,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:40,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665774372] [2021-11-12 22:21:40,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665774372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:40,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:40,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:21:40,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538143372] [2021-11-12 22:21:40,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:40,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:21:40,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:21:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:40,682 INFO L87 Difference]: Start difference. First operand 18329 states and 30506 transitions. Second operand has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:21:42,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:44,708 WARN L515 Checker$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 22:21:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:51,554 INFO L93 Difference]: Finished difference Result 64025 states and 109823 transitions. [2021-11-12 22:21:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 155 [2021-11-12 22:21:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:52,011 INFO L225 Difference]: With dead ends: 64025 [2021-11-12 22:21:52,011 INFO L226 Difference]: Without dead ends: 45779 [2021-11-12 22:21:52,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:52,098 INFO L933 BasicCegarLoop]: 1768 mSDtfsCounter, 4307 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 1476 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7363.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4408 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.04ms SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7914.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:52,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4408 Valid, 2931 Invalid, 4140 Unknown, 0 Unchecked, 21.04ms Time], IncrementalHoareTripleChecker [1476 Valid, 2662 Invalid, 2 Unknown, 0 Unchecked, 7914.16ms Time] [2021-11-12 22:21:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45779 states. [2021-11-12 22:21:55,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45779 to 42046. [2021-11-12 22:21:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42046 states, 28958 states have (on average 1.5747634505145383) internal successors, (45602), 31012 states have internal predecessors, (45602), 11379 states have call successors, (11379), 1163 states have call predecessors, (11379), 1708 states have return successors, (14275), 11201 states have call predecessors, (14275), 11374 states have call successors, (14275) [2021-11-12 22:21:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42046 states to 42046 states and 71256 transitions. [2021-11-12 22:21:55,860 INFO L78 Accepts]: Start accepts. Automaton has 42046 states and 71256 transitions. Word has length 155 [2021-11-12 22:21:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:55,860 INFO L470 AbstractCegarLoop]: Abstraction has 42046 states and 71256 transitions. [2021-11-12 22:21:55,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:21:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42046 states and 71256 transitions. [2021-11-12 22:21:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:21:55,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:55,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:55,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:56,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:56,084 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1523534936, now seen corresponding path program 1 times [2021-11-12 22:21:56,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:56,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396001299] [2021-11-12 22:21:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:56,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:56,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:56,087 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:56,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:21:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:57,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:57,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:57,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396001299] [2021-11-12 22:21:57,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396001299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:57,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:57,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:21:57,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071938625] [2021-11-12 22:21:57,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:57,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:21:57,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:21:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:57,731 INFO L87 Difference]: Start difference. First operand 42046 states and 71256 transitions. Second operand has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:21:59,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:01,758 WARN L515 Checker$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 22:22:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:15,211 INFO L93 Difference]: Finished difference Result 163407 states and 286118 transitions. [2021-11-12 22:22:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:22:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 156 [2021-11-12 22:22:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:16,506 INFO L225 Difference]: With dead ends: 163407 [2021-11-12 22:22:16,506 INFO L226 Difference]: Without dead ends: 121446 [2021-11-12 22:22:16,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:22:16,932 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 5441 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 1810 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7285.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5543 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 4431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.79ms SdHoareTripleChecker+Time, 1810 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7860.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:16,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5543 Valid, 2873 Invalid, 4431 Unknown, 0 Unchecked, 20.79ms Time], IncrementalHoareTripleChecker [1810 Valid, 2619 Invalid, 2 Unknown, 0 Unchecked, 7860.55ms Time] [2021-11-12 22:22:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121446 states. [2021-11-12 22:22:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121446 to 110132. [2021-11-12 22:22:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110132 states, 72723 states have (on average 1.5646356723457504) internal successors, (113785), 78466 states have internal predecessors, (113785), 33410 states have call successors, (33410), 2211 states have call predecessors, (33410), 3998 states have return successors, (43960), 33744 states have call predecessors, (43960), 33405 states have call successors, (43960) [2021-11-12 22:22:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110132 states to 110132 states and 191155 transitions. [2021-11-12 22:22:28,621 INFO L78 Accepts]: Start accepts. Automaton has 110132 states and 191155 transitions. Word has length 156 [2021-11-12 22:22:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:28,622 INFO L470 AbstractCegarLoop]: Abstraction has 110132 states and 191155 transitions. [2021-11-12 22:22:28,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:22:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 110132 states and 191155 transitions. [2021-11-12 22:22:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:22:28,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:28,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:28,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:28,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:28,842 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 980508985, now seen corresponding path program 1 times [2021-11-12 22:22:28,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:28,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138835319] [2021-11-12 22:22:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:28,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:28,844 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:28,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90aa30ae-055a-403b-9d59-d3b4a01c0a61/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:22:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:22:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:29,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:30,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:30,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138835319] [2021-11-12 22:22:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138835319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:30,787 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:30,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:22:30,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528808469] [2021-11-12 22:22:30,788 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:22:30,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:22:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:22:30,790 INFO L87 Difference]: Start difference. First operand 110132 states and 191155 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:22:32,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:34,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []