./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:17,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:17,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:17,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:17,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:17,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:17,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:17,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:17,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:17,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:17,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:17,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:17,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:17,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:17,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:17,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:17,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:17,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:17,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:17,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:17,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:17,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:17,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:17,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:17,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:17,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:17,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:17,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:17,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:17,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:17,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:17,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:17,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:17,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:17,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:17,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:17,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:17,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:17,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:17,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:17,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:17,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:35:17,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:17,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:17,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:17,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:17,995 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:17,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:17,995 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:17,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:35:17,995 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:17,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:17,996 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:35:17,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:35:17,996 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:17,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:35:17,997 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:35:17,997 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:35:17,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:17,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:17,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:35:17,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:17,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:17,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:17,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:18,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:18,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:18,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:18,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:18,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:18,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:18,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:18,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:35:18,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:35:18,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:18,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:18,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:18,002 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_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-19 13:35:18,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:18,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:18,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:18,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:18,320 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:18,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-19 13:35:18,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/80b3f0cdd/6d36c60f2d874fcc9703c9f4c612ce3a/FLAG6db6e2b4a [2021-11-19 13:35:19,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:19,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-19 13:35:19,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/80b3f0cdd/6d36c60f2d874fcc9703c9f4c612ce3a/FLAG6db6e2b4a [2021-11-19 13:35:19,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/80b3f0cdd/6d36c60f2d874fcc9703c9f4c612ce3a [2021-11-19 13:35:19,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:19,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:19,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:19,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:19,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:19,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:19" (1/1) ... [2021-11-19 13:35:19,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317cf751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:19, skipping insertion in model container [2021-11-19 13:35:19,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:19" (1/1) ... [2021-11-19 13:35:19,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:19,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:19,829 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-19 13:35:19,919 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:19,933 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:35:19,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@994f65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:19, skipping insertion in model container [2021-11-19 13:35:19,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:19,935 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:35:19,937 INFO L158 Benchmark]: Toolchain (without parser) took 675.13ms. Allocated memory is still 123.7MB. Free memory was 79.1MB in the beginning and 82.8MB in the end (delta: -3.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-19 13:35:19,937 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 123.7MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:35:19,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 672.28ms. Allocated memory is still 123.7MB. Free memory was 78.9MB in the beginning and 82.8MB in the end (delta: -3.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-19 13:35:19,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 123.7MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 672.28ms. Allocated memory is still 123.7MB. Free memory was 78.9MB in the beginning and 82.8MB in the end (delta: -3.9MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 933]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:22,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:22,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:22,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:22,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:22,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:22,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:22,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:22,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:22,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:22,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:22,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:22,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:22,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:22,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:22,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:22,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:22,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:22,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:22,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:22,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:22,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:22,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:22,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:22,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:22,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:22,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:22,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:22,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:22,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:22,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:22,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:22,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:22,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:22,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:22,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:22,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:22,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:22,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:22,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:22,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:22,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:35:22,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:22,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:22,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:22,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:22,347 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:22,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:22,348 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:22,348 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:22,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:22,349 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:22,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:22,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:22,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:22,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:22,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:22,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:22,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:22,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:22,353 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:35:22,353 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:35:22,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:22,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:22,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:22,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:22,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:22,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:35:22,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:22,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:22,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:22,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:22,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:22,356 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:35:22,356 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:35:22,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:22,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:22,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:22,357 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_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-19 13:35:22,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:22,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:22,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:22,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:22,775 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:22,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-19 13:35:22,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/0c456365a/3b0818fa7d784a57a5c2f83752171a18/FLAGf69a02df9 [2021-11-19 13:35:23,422 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:23,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-19 13:35:23,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/0c456365a/3b0818fa7d784a57a5c2f83752171a18/FLAGf69a02df9 [2021-11-19 13:35:23,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/data/0c456365a/3b0818fa7d784a57a5c2f83752171a18 [2021-11-19 13:35:23,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:23,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:23,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:23,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:23,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:23,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:23" (1/1) ... [2021-11-19 13:35:23,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b7cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:23, skipping insertion in model container [2021-11-19 13:35:23,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:23" (1/1) ... [2021-11-19 13:35:23,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:23,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:24,302 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-19 13:35:24,474 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:24,498 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:35:24,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:24,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-19 13:35:24,676 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:24,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:35:24,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-19 13:35:24,804 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:24,840 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:35:24,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24 WrapperNode [2021-11-19 13:35:24,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:24,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:24,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:35:24,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:35:24,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,946 INFO L137 Inliner]: procedures = 101, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 923 [2021-11-19 13:35:24,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:24,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:35:24,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:35:24,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:35:24,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:24,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:25,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:25,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:25,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:35:25,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:35:25,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:35:25,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:35:25,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (1/1) ... [2021-11-19 13:35:25,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:25,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:35:25,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:35:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:35:25,156 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:35:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:35:25,156 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:35:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:35:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:35:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:35:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:35:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:35:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:35:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:35:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:35:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:35:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:35:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:35:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:35:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:35:25,159 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:35:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:35:25,159 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:35:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:35:25,159 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:35:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:35:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:35:25,160 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:35:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:35:25,160 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:35:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:35:25,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:35:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:35:25,161 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:35:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:35:25,162 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:35:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:35:25,162 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:35:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:35:25,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:35:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:35:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:35:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:35:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:35:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:35:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:35:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:35:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:35:25,164 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:35:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:35:25,165 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:35:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:35:25,166 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:35:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:35:25,168 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:35:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:35:25,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:35:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:35:25,169 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:35:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 13:35:25,169 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 13:35:25,375 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:35:25,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:35:26,682 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:35:26,706 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:35:26,706 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:35:26,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:26 BoogieIcfgContainer [2021-11-19 13:35:26,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:35:26,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:35:26,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:35:26,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:35:26,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:35:23" (1/3) ... [2021-11-19 13:35:26,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66017783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:26, skipping insertion in model container [2021-11-19 13:35:26,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:24" (2/3) ... [2021-11-19 13:35:26,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66017783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:26, skipping insertion in model container [2021-11-19 13:35:26,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:26" (3/3) ... [2021-11-19 13:35:26,719 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2021-11-19 13:35:26,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:35:26,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:35:26,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:35:26,798 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:35:26,798 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:35:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 605 states, 471 states have (on average 1.6772823779193207) internal successors, (790), 494 states have internal predecessors, (790), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:35:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:35:26,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:26,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:26,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -782155594, now seen corresponding path program 1 times [2021-11-19 13:35:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:26,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071630150] [2021-11-19 13:35:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:26,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:26,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:26,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:35:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:35:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:27,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:27,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:27,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071630150] [2021-11-19 13:35:27,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071630150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:27,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:27,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:35:27,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709475918] [2021-11-19 13:35:27,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:27,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:35:27,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:35:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:35:27,803 INFO L87 Difference]: Start difference. First operand has 605 states, 471 states have (on average 1.6772823779193207) internal successors, (790), 494 states have internal predecessors, (790), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 13:35:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:27,916 INFO L93 Difference]: Finished difference Result 626 states and 1030 transitions. [2021-11-19 13:35:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:35:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-19 13:35:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:27,949 INFO L225 Difference]: With dead ends: 626 [2021-11-19 13:35:27,950 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 13:35:27,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:35:27,970 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:35:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 13:35:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-19 13:35:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.675268817204301) internal successors, (779), 486 states have internal predecessors, (779), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 984 transitions. [2021-11-19 13:35:28,093 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 984 transitions. Word has length 60 [2021-11-19 13:35:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:28,094 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 984 transitions. [2021-11-19 13:35:28,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 13:35:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 984 transitions. [2021-11-19 13:35:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:35:28,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:28,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:28,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:28,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:28,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -20488219, now seen corresponding path program 1 times [2021-11-19 13:35:28,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:28,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589329946] [2021-11-19 13:35:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:28,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:28,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:28,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:35:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:35:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:29,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:29,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589329946] [2021-11-19 13:35:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589329946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:29,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:29,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:35:29,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657886457] [2021-11-19 13:35:29,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:29,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:35:29,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:35:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:35:29,170 INFO L87 Difference]: Start difference. First operand 597 states and 984 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:35:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:29,302 INFO L93 Difference]: Finished difference Result 1178 states and 1946 transitions. [2021-11-19 13:35:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:35:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-19 13:35:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:29,310 INFO L225 Difference]: With dead ends: 1178 [2021-11-19 13:35:29,310 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 13:35:29,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:35:29,317 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 15 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:29,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3877 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:35:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 13:35:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-19 13:35:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 465 states have (on average 1.6623655913978495) internal successors, (773), 486 states have internal predecessors, (773), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 978 transitions. [2021-11-19 13:35:29,361 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 978 transitions. Word has length 62 [2021-11-19 13:35:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:29,361 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 978 transitions. [2021-11-19 13:35:29,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:35:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 978 transitions. [2021-11-19 13:35:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:35:29,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:29,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:29,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:29,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:29,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 34631396, now seen corresponding path program 1 times [2021-11-19 13:35:29,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:29,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14563832] [2021-11-19 13:35:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:29,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:29,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:29,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:35:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:29,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:30,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:30,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:30,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14563832] [2021-11-19 13:35:30,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14563832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:30,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:30,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:35:30,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611656938] [2021-11-19 13:35:30,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:30,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:30,450 INFO L87 Difference]: Start difference. First operand 597 states and 978 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:35:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:30,691 INFO L93 Difference]: Finished difference Result 1136 states and 1863 transitions. [2021-11-19 13:35:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:35:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-19 13:35:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:30,700 INFO L225 Difference]: With dead ends: 1136 [2021-11-19 13:35:30,700 INFO L226 Difference]: Without dead ends: 591 [2021-11-19 13:35:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:30,708 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 193 mSDsluCounter, 6659 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 7624 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:30,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 7624 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-19 13:35:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-19 13:35:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 459 states have (on average 1.6557734204793029) internal successors, (760), 480 states have internal predecessors, (760), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 965 transitions. [2021-11-19 13:35:30,758 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 965 transitions. Word has length 67 [2021-11-19 13:35:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:30,760 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 965 transitions. [2021-11-19 13:35:30,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:35:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 965 transitions. [2021-11-19 13:35:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:35:30,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:30,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:30,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:30,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:30,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1238642586, now seen corresponding path program 1 times [2021-11-19 13:35:30,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:30,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257278653] [2021-11-19 13:35:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:30,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:30,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:30,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:35:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:35:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:31,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:31,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:31,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257278653] [2021-11-19 13:35:31,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257278653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:31,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:31,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:35:31,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406640843] [2021-11-19 13:35:31,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:31,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:35:31,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:35:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:35:31,686 INFO L87 Difference]: Start difference. First operand 591 states and 965 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:35:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:31,860 INFO L93 Difference]: Finished difference Result 1139 states and 1864 transitions. [2021-11-19 13:35:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:35:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-19 13:35:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:31,866 INFO L225 Difference]: With dead ends: 1139 [2021-11-19 13:35:31,867 INFO L226 Difference]: Without dead ends: 591 [2021-11-19 13:35:31,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:35:31,879 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 121 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:31,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 2735 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-19 13:35:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-19 13:35:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 459 states have (on average 1.6034858387799564) internal successors, (736), 480 states have internal predecessors, (736), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 941 transitions. [2021-11-19 13:35:31,919 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 941 transitions. Word has length 68 [2021-11-19 13:35:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:31,920 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 941 transitions. [2021-11-19 13:35:31,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:35:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 941 transitions. [2021-11-19 13:35:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 13:35:31,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:31,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:31,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:32,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1086078261, now seen corresponding path program 1 times [2021-11-19 13:35:32,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:32,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955034267] [2021-11-19 13:35:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:32,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:32,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:32,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:32,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:35:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:32,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:32,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:32,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955034267] [2021-11-19 13:35:32,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955034267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:32,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:32,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:35:32,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803962569] [2021-11-19 13:35:32,936 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:32,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:35:32,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:35:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:35:32,937 INFO L87 Difference]: Start difference. First operand 591 states and 941 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 13:35:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:33,073 INFO L93 Difference]: Finished difference Result 1130 states and 1826 transitions. [2021-11-19 13:35:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:35:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-19 13:35:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:33,080 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 13:35:33,080 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:35:33,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:35:33,084 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 117 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5511 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:33,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5511 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:35:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 13:35:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 438 states have (on average 1.6232876712328768) internal successors, (711), 459 states have internal predecessors, (711), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 916 transitions. [2021-11-19 13:35:33,110 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 916 transitions. Word has length 70 [2021-11-19 13:35:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:33,111 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 916 transitions. [2021-11-19 13:35:33,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 13:35:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 916 transitions. [2021-11-19 13:35:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:35:33,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:33,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:33,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:33,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1219091537, now seen corresponding path program 1 times [2021-11-19 13:35:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:33,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434331531] [2021-11-19 13:35:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:33,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:33,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:33,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:33,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:35:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:33,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:35:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:34,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:34,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434331531] [2021-11-19 13:35:34,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434331531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:34,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:34,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:35:34,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127731402] [2021-11-19 13:35:34,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:34,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:35:34,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:35:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:35:34,267 INFO L87 Difference]: Start difference. First operand 570 states and 916 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:35:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:34,461 INFO L93 Difference]: Finished difference Result 1103 states and 1790 transitions. [2021-11-19 13:35:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:35:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-19 13:35:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:34,471 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 13:35:34,471 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:35:34,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:35:34,476 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 44 mSDsluCounter, 8083 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8984 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:34,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8984 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:35:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 13:35:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 438 states have (on average 1.6210045662100456) internal successors, (710), 459 states have internal predecessors, (710), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 13:35:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 915 transitions. [2021-11-19 13:35:34,503 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 915 transitions. Word has length 73 [2021-11-19 13:35:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:34,503 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 915 transitions. [2021-11-19 13:35:34,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 13:35:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 915 transitions. [2021-11-19 13:35:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:35:34,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:34,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:34,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:34,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:34,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2003884773, now seen corresponding path program 1 times [2021-11-19 13:35:34,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:34,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298206495] [2021-11-19 13:35:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:34,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:34,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:34,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:35:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:35,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:36,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:36,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298206495] [2021-11-19 13:35:36,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298206495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:36,065 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:36,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 13:35:36,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638508164] [2021-11-19 13:35:36,065 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:36,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:35:36,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:35:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:36,066 INFO L87 Difference]: Start difference. First operand 570 states and 915 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 13:35:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:43,858 INFO L93 Difference]: Finished difference Result 2870 states and 4742 transitions. [2021-11-19 13:35:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:35:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2021-11-19 13:35:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:43,881 INFO L225 Difference]: With dead ends: 2870 [2021-11-19 13:35:43,881 INFO L226 Difference]: Without dead ends: 2345 [2021-11-19 13:35:43,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:35:43,887 INFO L933 BasicCegarLoop]: 1629 mSDtfsCounter, 6061 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 4539 mSolverCounterSat, 1681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6258 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 6220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1681 IncrementalHoareTripleChecker+Valid, 4539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:43,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6258 Valid, 3284 Invalid, 6220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1681 Valid, 4539 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 13:35:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-11-19 13:35:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2157. [2021-11-19 13:35:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 1648 states have (on average 1.6510922330097086) internal successors, (2721), 1713 states have internal predecessors, (2721), 419 states have call successors, (419), 86 states have call predecessors, (419), 89 states have return successors, (427), 384 states have call predecessors, (427), 414 states have call successors, (427) [2021-11-19 13:35:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3567 transitions. [2021-11-19 13:35:44,055 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3567 transitions. Word has length 74 [2021-11-19 13:35:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:44,056 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 3567 transitions. [2021-11-19 13:35:44,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 13:35:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3567 transitions. [2021-11-19 13:35:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:35:44,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:44,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:44,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:44,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1629547813, now seen corresponding path program 1 times [2021-11-19 13:35:44,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:44,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055812569] [2021-11-19 13:35:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:44,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:44,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:35:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:35:44,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:35:45,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:45,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055812569] [2021-11-19 13:35:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055812569] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:45,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:45,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:35:45,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925378238] [2021-11-19 13:35:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:45,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:35:45,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:35:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:35:45,542 INFO L87 Difference]: Start difference. First operand 2157 states and 3567 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:35:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:46,569 INFO L93 Difference]: Finished difference Result 4285 states and 7218 transitions. [2021-11-19 13:35:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:35:46,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-11-19 13:35:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:46,596 INFO L225 Difference]: With dead ends: 4285 [2021-11-19 13:35:46,596 INFO L226 Difference]: Without dead ends: 2173 [2021-11-19 13:35:46,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:46,617 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 857 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:46,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2274 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:35:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-11-19 13:35:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 2173. [2021-11-19 13:35:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 1660 states have (on average 1.6463855421686746) internal successors, (2733), 1725 states have internal predecessors, (2733), 419 states have call successors, (419), 90 states have call predecessors, (419), 93 states have return successors, (431), 384 states have call predecessors, (431), 414 states have call successors, (431) [2021-11-19 13:35:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3583 transitions. [2021-11-19 13:35:46,800 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3583 transitions. Word has length 129 [2021-11-19 13:35:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 3583 transitions. [2021-11-19 13:35:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:35:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3583 transitions. [2021-11-19 13:35:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:35:46,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:46,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:46,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:47,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:47,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash -217516115, now seen corresponding path program 1 times [2021-11-19 13:35:47,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:47,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205233929] [2021-11-19 13:35:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:47,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:47,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:47,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:47,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:35:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:35:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:35:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:35:48,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:48,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205233929] [2021-11-19 13:35:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205233929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:48,294 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:48,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:35:48,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434232183] [2021-11-19 13:35:48,295 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:48,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:35:48,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:35:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:35:48,297 INFO L87 Difference]: Start difference. First operand 2173 states and 3583 transitions. Second operand has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-19 13:35:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:55,902 INFO L93 Difference]: Finished difference Result 5763 states and 9496 transitions. [2021-11-19 13:35:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:35:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 130 [2021-11-19 13:35:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:55,939 INFO L225 Difference]: With dead ends: 5763 [2021-11-19 13:35:55,940 INFO L226 Difference]: Without dead ends: 3635 [2021-11-19 13:35:55,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:35:55,960 INFO L933 BasicCegarLoop]: 1876 mSDtfsCounter, 3481 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 6663 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3574 SdHoareTripleChecker+Valid, 4863 SdHoareTripleChecker+Invalid, 7942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 6663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:55,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3574 Valid, 4863 Invalid, 7942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 6663 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-11-19 13:35:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-11-19 13:35:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3163. [2021-11-19 13:35:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 2356 states have (on average 1.602716468590832) internal successors, (3776), 2447 states have internal predecessors, (3776), 657 states have call successors, (657), 133 states have call predecessors, (657), 149 states have return successors, (699), 615 states have call predecessors, (699), 652 states have call successors, (699) [2021-11-19 13:35:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 5132 transitions. [2021-11-19 13:35:56,228 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 5132 transitions. Word has length 130 [2021-11-19 13:35:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:56,230 INFO L470 AbstractCegarLoop]: Abstraction has 3163 states and 5132 transitions. [2021-11-19 13:35:56,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 11 states have internal predecessors, (125), 7 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-19 13:35:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 5132 transitions. [2021-11-19 13:35:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:35:56,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:56,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:56,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:56,458 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 203899311, now seen corresponding path program 1 times [2021-11-19 13:35:56,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:56,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530993770] [2021-11-19 13:35:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:56,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:56,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:56,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:35:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:35:57,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:35:57,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530993770] [2021-11-19 13:35:57,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530993770] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:57,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:57,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:35:57,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126048712] [2021-11-19 13:35:57,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:57,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:35:57,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:35:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:35:57,713 INFO L87 Difference]: Start difference. First operand 3163 states and 5132 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:35:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:58,749 INFO L93 Difference]: Finished difference Result 6331 states and 10462 transitions. [2021-11-19 13:35:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:35:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-19 13:35:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:58,777 INFO L225 Difference]: With dead ends: 6331 [2021-11-19 13:35:58,777 INFO L226 Difference]: Without dead ends: 3213 [2021-11-19 13:35:58,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:58,801 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 855 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:58,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 2275 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:35:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-11-19 13:35:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3213. [2021-11-19 13:35:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2396 states have (on average 1.5926544240400669) internal successors, (3816), 2487 states have internal predecessors, (3816), 657 states have call successors, (657), 143 states have call predecessors, (657), 159 states have return successors, (705), 615 states have call predecessors, (705), 652 states have call successors, (705) [2021-11-19 13:35:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 5178 transitions. [2021-11-19 13:35:59,019 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 5178 transitions. Word has length 131 [2021-11-19 13:35:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:59,020 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 5178 transitions. [2021-11-19 13:35:59,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:35:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 5178 transitions. [2021-11-19 13:35:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:35:59,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:59,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:59,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:59,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1750671259, now seen corresponding path program 1 times [2021-11-19 13:35:59,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:59,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101466952] [2021-11-19 13:35:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:59,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:59,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:59,245 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:59,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:35:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:35:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:36:00,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:00,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101466952] [2021-11-19 13:36:00,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101466952] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:00,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:00,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:36:00,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673039078] [2021-11-19 13:36:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:00,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:00,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:00,362 INFO L87 Difference]: Start difference. First operand 3213 states and 5178 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:01,205 INFO L93 Difference]: Finished difference Result 6441 states and 10554 transitions. [2021-11-19 13:36:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:36:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-19 13:36:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:01,234 INFO L225 Difference]: With dead ends: 6441 [2021-11-19 13:36:01,234 INFO L226 Difference]: Without dead ends: 3273 [2021-11-19 13:36:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:36:01,257 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 855 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:01,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 2275 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:36:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-19 13:36:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3273. [2021-11-19 13:36:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 2446 states have (on average 1.580539656582175) internal successors, (3866), 2537 states have internal predecessors, (3866), 657 states have call successors, (657), 153 states have call predecessors, (657), 169 states have return successors, (711), 615 states have call predecessors, (711), 652 states have call successors, (711) [2021-11-19 13:36:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 5234 transitions. [2021-11-19 13:36:01,531 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 5234 transitions. Word has length 133 [2021-11-19 13:36:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 5234 transitions. [2021-11-19 13:36:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 5234 transitions. [2021-11-19 13:36:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:36:01,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:01,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:01,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:01,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:01,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 426652647, now seen corresponding path program 1 times [2021-11-19 13:36:01,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:01,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996248687] [2021-11-19 13:36:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:01,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:01,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:01,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:01,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:36:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:36:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:36:02,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:36:02,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:02,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996248687] [2021-11-19 13:36:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996248687] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:02,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:02,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:36:02,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112707196] [2021-11-19 13:36:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:02,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:02,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:02,919 INFO L87 Difference]: Start difference. First operand 3273 states and 5234 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:03,839 INFO L93 Difference]: Finished difference Result 6571 states and 10666 transitions. [2021-11-19 13:36:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:36:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-11-19 13:36:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:03,865 INFO L225 Difference]: With dead ends: 6571 [2021-11-19 13:36:03,866 INFO L226 Difference]: Without dead ends: 3343 [2021-11-19 13:36:03,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:36:03,880 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 847 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:03,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 2275 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:36:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-19 13:36:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3343. [2021-11-19 13:36:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 2506 states have (on average 1.5666400638467677) internal successors, (3926), 2597 states have internal predecessors, (3926), 657 states have call successors, (657), 163 states have call predecessors, (657), 179 states have return successors, (717), 615 states have call predecessors, (717), 652 states have call successors, (717) [2021-11-19 13:36:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 5300 transitions. [2021-11-19 13:36:04,076 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 5300 transitions. Word has length 135 [2021-11-19 13:36:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:04,076 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 5300 transitions. [2021-11-19 13:36:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 5300 transitions. [2021-11-19 13:36:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:36:04,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:04,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:04,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:04,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:04,299 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1873600933, now seen corresponding path program 1 times [2021-11-19 13:36:04,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:04,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002160014] [2021-11-19 13:36:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:04,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:04,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:04,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:36:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:04,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:05,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:06,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:06,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002160014] [2021-11-19 13:36:06,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002160014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:06,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553118348] [2021-11-19 13:36:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:06,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:06,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:06,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:36:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:36:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:36:06,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:07,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553118348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:07,121 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:07,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:36:07,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656447858] [2021-11-19 13:36:07,122 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:07,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:07,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:36:07,123 INFO L87 Difference]: Start difference. First operand 3343 states and 5300 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:07,405 INFO L93 Difference]: Finished difference Result 9905 states and 15896 transitions. [2021-11-19 13:36:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-19 13:36:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:07,454 INFO L225 Difference]: With dead ends: 9905 [2021-11-19 13:36:07,454 INFO L226 Difference]: Without dead ends: 6609 [2021-11-19 13:36:07,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:36:07,471 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 861 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:07,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 2563 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6609 states. [2021-11-19 13:36:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6609 to 6564. [2021-11-19 13:36:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6564 states, 4929 states have (on average 1.5696895922093732) internal successors, (7737), 5102 states have internal predecessors, (7737), 1280 states have call successors, (1280), 315 states have call predecessors, (1280), 354 states have return successors, (1464), 1212 states have call predecessors, (1464), 1275 states have call successors, (1464) [2021-11-19 13:36:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6564 states to 6564 states and 10481 transitions. [2021-11-19 13:36:07,919 INFO L78 Accepts]: Start accepts. Automaton has 6564 states and 10481 transitions. Word has length 137 [2021-11-19 13:36:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:07,920 INFO L470 AbstractCegarLoop]: Abstraction has 6564 states and 10481 transitions. [2021-11-19 13:36:07,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:36:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6564 states and 10481 transitions. [2021-11-19 13:36:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:36:07,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:07,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:07,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:08,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:08,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:08,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1035162969, now seen corresponding path program 1 times [2021-11-19 13:36:08,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:08,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029957704] [2021-11-19 13:36:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:08,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:08,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:08,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:36:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:09,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:10,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:10,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029957704] [2021-11-19 13:36:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029957704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:10,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895915508] [2021-11-19 13:36:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:10,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:10,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:10,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:10,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:36:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:10,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895915508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:11,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:11,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:36:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615919387] [2021-11-19 13:36:11,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:36:11,195 INFO L87 Difference]: Start difference. First operand 6564 states and 10481 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:13,461 INFO L93 Difference]: Finished difference Result 17936 states and 29171 transitions. [2021-11-19 13:36:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 137 [2021-11-19 13:36:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:13,536 INFO L225 Difference]: With dead ends: 17936 [2021-11-19 13:36:13,536 INFO L226 Difference]: Without dead ends: 11417 [2021-11-19 13:36:13,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:36:13,573 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 2616 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:13,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 1512 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:36:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11417 states. [2021-11-19 13:36:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11417 to 10955. [2021-11-19 13:36:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 8115 states have (on average 1.5643869377695625) internal successors, (12695), 8454 states have internal predecessors, (12695), 2250 states have call successors, (2250), 496 states have call predecessors, (2250), 589 states have return successors, (2775), 2166 states have call predecessors, (2775), 2245 states have call successors, (2775) [2021-11-19 13:36:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 17720 transitions. [2021-11-19 13:36:14,332 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 17720 transitions. Word has length 137 [2021-11-19 13:36:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:14,333 INFO L470 AbstractCegarLoop]: Abstraction has 10955 states and 17720 transitions. [2021-11-19 13:36:14,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 17720 transitions. [2021-11-19 13:36:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:36:14,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:14,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:14,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:14,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:14,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:14,761 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2025573018, now seen corresponding path program 1 times [2021-11-19 13:36:14,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:14,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088029949] [2021-11-19 13:36:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:14,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:14,763 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:14,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:36:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:15,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:16,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:16,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088029949] [2021-11-19 13:36:16,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088029949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:16,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1333994674] [2021-11-19 13:36:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:16,512 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:16,521 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:16,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:36:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:17,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1333994674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:17,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:17,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:36:17,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418906160] [2021-11-19 13:36:17,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:17,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:17,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:36:17,644 INFO L87 Difference]: Start difference. First operand 10955 states and 17720 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:20,660 INFO L93 Difference]: Finished difference Result 32553 states and 54412 transitions. [2021-11-19 13:36:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:20,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 138 [2021-11-19 13:36:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:20,812 INFO L225 Difference]: With dead ends: 32553 [2021-11-19 13:36:20,813 INFO L226 Difference]: Without dead ends: 21643 [2021-11-19 13:36:20,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:36:20,874 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 2620 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:20,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2703 Valid, 1455 Invalid, 1615 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [654 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:36:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21643 states. [2021-11-19 13:36:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21643 to 20672. [2021-11-19 13:36:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20672 states, 15036 states have (on average 1.557927640329875) internal successors, (23425), 15777 states have internal predecessors, (23425), 4536 states have call successors, (4536), 858 states have call predecessors, (4536), 1099 states have return successors, (6337), 4444 states have call predecessors, (6337), 4531 states have call successors, (6337) [2021-11-19 13:36:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20672 states to 20672 states and 34298 transitions. [2021-11-19 13:36:22,498 INFO L78 Accepts]: Start accepts. Automaton has 20672 states and 34298 transitions. Word has length 138 [2021-11-19 13:36:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:22,498 INFO L470 AbstractCegarLoop]: Abstraction has 20672 states and 34298 transitions. [2021-11-19 13:36:22,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 20672 states and 34298 transitions. [2021-11-19 13:36:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:36:22,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:22,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:22,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:22,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:22,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:22,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1631457737, now seen corresponding path program 1 times [2021-11-19 13:36:22,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:22,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143854977] [2021-11-19 13:36:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:22,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:22,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:22,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:22,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:36:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:23,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:24,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:24,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143854977] [2021-11-19 13:36:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143854977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:24,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592389976] [2021-11-19 13:36:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:24,833 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:24,834 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:24,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:36:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:25,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592389976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:26,019 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:26,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:36:26,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338821941] [2021-11-19 13:36:26,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:26,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:26,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:36:26,022 INFO L87 Difference]: Start difference. First operand 20672 states and 34298 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:30,261 INFO L93 Difference]: Finished difference Result 65310 states and 114467 transitions. [2021-11-19 13:36:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-19 13:36:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:30,641 INFO L225 Difference]: With dead ends: 65310 [2021-11-19 13:36:30,642 INFO L226 Difference]: Without dead ends: 44683 [2021-11-19 13:36:30,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:36:30,789 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 2049 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:30,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 1438 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 13:36:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44683 states. [2021-11-19 13:36:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44683 to 42689. [2021-11-19 13:36:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42689 states, 30401 states have (on average 1.5504424196572482) internal successors, (47135), 32128 states have internal predecessors, (47135), 10064 states have call successors, (10064), 1582 states have call predecessors, (10064), 2223 states have return successors, (16571), 10028 states have call predecessors, (16571), 10059 states have call successors, (16571) [2021-11-19 13:36:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42689 states to 42689 states and 73770 transitions. [2021-11-19 13:36:34,239 INFO L78 Accepts]: Start accepts. Automaton has 42689 states and 73770 transitions. Word has length 139 [2021-11-19 13:36:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:34,240 INFO L470 AbstractCegarLoop]: Abstraction has 42689 states and 73770 transitions. [2021-11-19 13:36:34,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42689 states and 73770 transitions. [2021-11-19 13:36:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:36:34,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:34,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:34,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:34,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:34,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:34,671 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -964701944, now seen corresponding path program 1 times [2021-11-19 13:36:34,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:34,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014142451] [2021-11-19 13:36:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:34,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:34,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:34,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:36:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:36,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:36,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014142451] [2021-11-19 13:36:36,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014142451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:36,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505771167] [2021-11-19 13:36:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:36,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:36,747 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:36,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:36:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:37,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:37,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:38,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505771167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:38,150 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:38,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:36:38,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653501143] [2021-11-19 13:36:38,151 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:38,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:38,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:36:38,152 INFO L87 Difference]: Start difference. First operand 42689 states and 73770 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:46,184 INFO L93 Difference]: Finished difference Result 140491 states and 265426 transitions. [2021-11-19 13:36:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 140 [2021-11-19 13:36:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:47,075 INFO L225 Difference]: With dead ends: 140491 [2021-11-19 13:36:47,075 INFO L226 Difference]: Without dead ends: 97847 [2021-11-19 13:36:47,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:36:47,484 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 1979 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:47,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2060 Valid, 1578 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 13:36:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97847 states. [2021-11-19 13:36:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97847 to 93970. [2021-11-19 13:36:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93970 states, 65442 states have (on average 1.5422053115736072) internal successors, (100925), 69619 states have internal predecessors, (100925), 23776 states have call successors, (23776), 3030 states have call predecessors, (23776), 4751 states have return successors, (47717), 24068 states have call predecessors, (47717), 23771 states have call successors, (47717) [2021-11-19 13:36:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93970 states to 93970 states and 172418 transitions. [2021-11-19 13:36:55,540 INFO L78 Accepts]: Start accepts. Automaton has 93970 states and 172418 transitions. Word has length 140 [2021-11-19 13:36:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:55,541 INFO L470 AbstractCegarLoop]: Abstraction has 93970 states and 172418 transitions. [2021-11-19 13:36:55,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 13:36:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 93970 states and 172418 transitions. [2021-11-19 13:36:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:36:55,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:55,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:55,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:55,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-19 13:36:55,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:55,969 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:55,969 INFO L85 PathProgramCache]: Analyzing trace with hash 158730475, now seen corresponding path program 1 times [2021-11-19 13:36:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:55,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350480160] [2021-11-19 13:36:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:55,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:55,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:55,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:36:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:56,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:36:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:57,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350480160] [2021-11-19 13:36:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350480160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462633576] [2021-11-19 13:36:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:57,851 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:57,852 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:57,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0bb84cf-e5aa-41e9-9445-aa235a5abc46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 13:36:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:58,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:59,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [462633576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:59,029 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:36:59,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:36:59,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863007429] [2021-11-19 13:36:59,029 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:36:59,031 INFO L87 Difference]: Start difference. First operand 93970 states and 172418 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 5 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27)